Science topic

Biogas - Science topic

Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal dung, and kitchen waste can be converted into a gaseous fuel called biogas. Biogas originates from biogenic material, for example through anerobic digestion, and is a type of biofuel.
Questions related to Biogas
  • asked a question related to Biogas
Question
2 answers
Example:
The biogas yield of a feedstock with TS content of 7.5% and VS content of 84% on the 15th day is 510 ml. The total mass of the slurry is 700 g (350 g feedstock + 350 g distilled water)
Relevant answer
Answer
Thank you very much sir
  • asked a question related to Biogas
Question
2 answers
#Anaerobic digestion using brewery spent grain, What amount of biogas can this produced
Relevant answer
Answer
BITECO BIOGAS - Calculator Main (biteco-energy.com)
  • asked a question related to Biogas
Question
3 answers
Bio-gas composition with different properties?
Relevant answer
As the other colleagues pointed out, gas chromatography allows ascertaining the biogas composition. Nevertheless, in Chapter 2 of the bibliography mentioned at the end of my answer are presented several methods that enable the calculation of biogas potential and composition.
Best regards,
Roberto Hernández
Weinrich, S., Schäfer, F., Bochmann, G., Liebetrau, J., (2018). Value of batch tests for biogas potential analysis; method comparison
and challenges of substrate and efficiency evaluation of biogas plants. Murphy, J.D. (Ed.) IEA Bioenergy Task 37, 2018: 10
ISBN: 978-1-910154-49-6 (eBook electronic edition), 978-1-910154-48-9 (printed paper edition)
  • asked a question related to Biogas
Question
1 answer
I am looking the solubility of H2S in water at 1 atm and 313.15 K (4O c) to conduct feasibility study on water scrubber for biogas treatment.
Relevant answer
Answer
  • asked a question related to Biogas
Question
4 answers
What is A/F ratio is required in biogas venturi in biogas engine?
Relevant answer
Answer
  • asked a question related to Biogas
Question
9 answers
The advantages of using maize for Biogas
Relevant answer
Answer
Maize in the form of silage provides high yields (10–30 t of total solids—TS per hectare [1–3]) and is thus a suitable energetic crop for biogas production.
Regards,
Shafagat
  • asked a question related to Biogas
Question
15 answers
Does anyone have any case studies on the Environmental Impact of Milk Production?
Environmental Impact of a Dairy is what I studied but unfortunately it is completely different with that of the Milk Production
Relevant answer
Answer
Faraed Salman THankyou for sharing both the links and I personally read the shared articles and publications and the second one is quite interesting which shows the environmental impact of the dairy industry which is yes connected to the question raised by me and this is in the circular economy and the part of the question, thank you for your time and the publications you had shared.
  • asked a question related to Biogas
Question
4 answers
There is a point in the text: at lower pH, organic matter can exist in its molecular form, enabling it to readily access the gas-liquid interface of cavitation bubbles. The organic matter would then be thermally decomposed at the gas-liquid interface and involved in free radical reactions efficient in the cavitation air bubbles. In contrast, the ionic form of organic matter cannot access the interface and disperse into the air bubbles easily.
Is there more literature to explain the forms of organic matter at low pH?
Relevant answer
Answer
Ky Ky Yes i do agree with the comment of Prem Baboo and it makes sense as i was reading both the comments and comparing my comment with the Prem Baboo and obviously many reasons to be shared
  • asked a question related to Biogas
Question
10 answers
Capacity of plant is around 2-3 m3 . After critical survey on the literature I found there is lack of ideas and suggestions on agitation of slurry inside  such mid-size digester (6-8 feet) .Many of Methods encountered on internet are practically not feasible. I request researchers to suggest for the the same.
Thanking you.
Relevant answer
Answer
Rishi Pareek Etiher with the help of Mechanical seal or one of the simple way is to immerse the pipeline much below the slurry level to avoid gas loss from the system.
  • asked a question related to Biogas
Question
4 answers
I want to know the subject deeply.
Relevant answer
Answer
bhaskor jyoti Bora Amazon or Flipcart are the right places to look for the latest additions of the Books in this space and I had once purchased a book from Germany and it was amazing which I myself term or say it to be the Bible of Biogas and that had various sections/phases which was "Biogas from Waste and Renewable Resources" by Dieter Deublein and Angelika Steinhauser but I feel this was 7-8 years back and I am sure there are many alternative to this books with much much upgraded version
  • asked a question related to Biogas
Question
4 answers
Dear reaserchers,
I study biohydrogen production via dark fermentation by activated sludge microorganisms. We conduct lab scale batch-experiment in AMTPS Bioprocess Controll (working volume of single reactor is 400 ml). I wonder what is the best way to collect the biogas samples from our experiments. So far, we have taken samples by connecting the batch reactor with a tedlar bag (volume 600 ml) with a hose. Unfortunetely this way is not good enought for avoid air contamination of the samples and rapid hydrogen dyffusion.
Relevant answer
Answer
I would recommend foil bags with screw valve fittings for collecting biogas over standard tedlar bags. Foil bags generally have better stability for low molecular weight compounds and are less prone to oxygen diffusion. I also think that bags with a built in screw valve are less prone to leakage as well as being easier to connect to fittings.
Though you can easily test if the bag is your source of contamination by filling it with a known gas, leaving it for a representative time and then analaysing the gas.
  • asked a question related to Biogas
Question
7 answers
Hello, I am asking about calculating the water volume required for a gas boiler with a thermal efficiency of 94% and operating at a pressure of 1.25 MPa, with a rated capacity of 20 t/h. The temperature of the input water is 20 ℃ and the output steam is 194 ℃.
Thanks in advance!
Relevant answer
Answer
Exactly correct this answer. In general (as thumb rule) 1 lit of F/O or 1 m3 of LPG can generate 12 - 14 kg of steam. As I understood, Mr. Ahmaed question was the water requirement. In my view, it depends on the steam demand. If the boiler operates at it's maximum capacity (i.e. 20 ton/hr.) and the evaporation /leakage/blowdown losses are negligible, the water requirement is same as the boiler capacity.
  • asked a question related to Biogas
Question
3 answers
Hello,
I am performing a batch experiment of producing biogas from cow dung and chlorella. After performing CHNS, I found the C:N ratio of cow dung to be 12.34 and chlorella would be around 5. I want to increase the ratio to come in the range of 20-30. Please provide me with any suitable measures as to how to increase this ratio.
Relevant answer
Answer
Agricultural crop residues (for example, straw or stalks), cereal wastes of food production or fallen leaves with high C:N ratio can be added as co-substrates. Alternatively, carbon sources such as fat waste or glycerol in small amounts can be added. The most easy way is to add glucose or other carbohydrate but it depends on the purpose of the study. Some references:
  • asked a question related to Biogas
Question
22 answers
Dear colleagues
I want to write a review paper entitled" The potential use of biogas to meet electrical and thermal loads of building" please anyone wants distribution inform me.to
1-Introduction
2-Evaluation the use of biogas in different parts of the world
3-Different usages of biogas
4-Recent progress in biogas production
5-Biogas fueled electrical power production systems
1-5-Micro gas turbine
2-5-Fuel cell
3-5-IC engine
6-Energy analysis of biogas fueled system
7-Exergy analysis of biogas fueled system
8-Economic analysis of biogas fueled system
9-Conclusion
Relevant answer
Answer
Mehdi Aliehyaei I would love to be the part of this review and like to contribute to a chapter if still time is available and you permit
I can be contacted on srinivaskasulla@gmail.com and my whatsapp number is +91 8317585217
I am from India
  • asked a question related to Biogas
Question
4 answers
I am trying to analyze a biogas sample using gas chromatography. The report in my GC shows area and area percentages. How do I calculate the concentration of each component of the biogas from the area obtained from the report?
Relevant answer
Answer
  • asked a question related to Biogas
Question
9 answers
Fermentation is the decomposition of organic materials by microorganisms in the absence of oxygen. Biogas, which is mostly composed of methane and carbon dioxide, is one of the fermentation products. Multi-substrate fermentation can be carried out to boost output yield.
Fermentation methods are frequently used to stabilize liquid and solid waste. Biogas generation from agricultural wastes, animal dungs, municipal and industrial wastes has the potential to be a viable alternative energy source for many nations. A cubic meter of biogas may generate 2.1 kWh of electricity and 2.9 kWh of heat energy. Multiple benefits of biogas were discovered in the 1990s, as well as a wide range of biomass sources that may have been used to produce this resource. One of the techniques of usage is such production. Sugar wastewater, for example, is one of the wastes from the food sector that may be used in this way. Not only is biogas made up of methane(CH4) and CO2, but it also contains hydrogen(H2). Hydrogen is increasingly being referred to as the fuel of the future, and ways for producing it are the focus of extensive research. Sugar industry and cellulose manufacturing wastes, as well as other wastes with high carbohydrates concentrations, are one of the sources of bio-hydrogen, because to its high concentration with comparatively low nitrogen rate. It's also important thinking about the waste produced by watering plants. Plants reduce nitrogen levels, but wastes remain a major source of hydrogen. The creation of hydrogen from fermentation effluent is an intriguing solution. The process is a two-phase fermentation in which hydrogen is produced in the first phase and methane is produced in the second. Some algae, such as Laminaria japonica, can be used as a substrate, but food industry wastes can also be used, which is more useful from a recycling standpoint.
Relevant answer
Answer
Ok i will go through all these articles
  • asked a question related to Biogas
Question
3 answers
Both in small scale digester as well as large scale digester.
For Feedstock 1. Manure only 2.Manure mixed with straw, urine, and grasses.
Relevant answer
Answer
Many fungi produce acids but they are not normally a problem in anaerobic digesters specially if there is enough alkalinity available. Often fungal enzymes are more aggressive than many bacterial enzymes and may enhance the first step of methanogenesis (hydrolysis of macro molecules which is the slowest step.. AKA rate determining step)...so they can help instead of inhibit. However,
If pH drops below 7 for any reason (bacterial or fungal) the lower pH causes methanogens to be inhibited or die. If there is a very high increase of bacteria or fungi added suddenly, the hydrolysis step may increase too fast not allowing the next step of methanogenesis to catch up and to metabolize the organic acids produced in the hydrolysis step causing drop in pH.
  • asked a question related to Biogas
Question
8 answers
Performance evaluation of a laboratory scale digesters of methane in biogas produced from solid waste using cow dung and chicken droppings
Relevant answer
Answer
Nosa Ogbeide i guess the above answers including mine which was answered earlier solves your question however the answers raised by Ca Dr. Gaurav Bhambri the link about the poultry litter looks best to me and yes there are many instances of poultry litter to biogas along with co digestion I have personally installed few lab scale then pilot scale then field scale small plants then medium and large scale plant.
I have personally installed one 50 tonnes per day of chicken litter to biogas project which works best with 10% of the cow manure or wood char or green waste which is rich in carbon and tried digesting chicken litter but due to mono digestion and ammonia toxification there were times when the digester used to stop producing gas in the initial stages.
  • asked a question related to Biogas
Question
5 answers
Hi,
I would like to make biogas in a laboratory scale by mixing methane and carbon dioxide. Is there any specific protocol to follow, or safety considerations i must keep in mind?
And can i achieve this by simple mixing of gases using check valves and rotameters? Or is some specific equipment required?
Thanks in Advance
Advait Palakodeti
Relevant answer
Answer
Advait Palakodeti couldnt understand your question as methane and carbon dioxide is already present in the biogas so how can we blend it together further?
  • asked a question related to Biogas
Question
5 answers
Hi,
I would like to ask where I can get a dataset for an Artificial Neural Network I would like to build for the prediction of biogas yield and methane content. Ideally, I will require at least 500 cases.
I have searched many articles on databases, but so far I have been able to download only 1 dataset from the article (Modeling of biogas production from food, fruits and vegetables wastes using artificial neural network (ANN), Goncalves, et al, 2021)
The input data for my ANN will be: OLR (g VS/l.d), HRT, Temperature, pH, Reactor volume and the expected outputs are biogas yield (L/(g VS) and methane content (%).
Can someone please share some information as to where I can get a dataset for my project or if anyone would like to share the data from their experiments, it will be much appreciated.
Regards
W
Relevant answer
Answer
Ramón Piloto-Rodríguez YES I am about to publish a paper on this and working towards the neura network dataset for biogas production as well
  • asked a question related to Biogas
Question
10 answers
what are the most needed devices or measuring device needed in a renewable energy lab. for education and research in
solar energy
biogas
wind energy
others
related to agriculture and agricultural engineering
-----
thanks in advance
Relevant answer
Answer
Ashrf Abdel Galil Anwer the experts above have already cited and for solar equipment, one can easily understand the requirements for the laboratory related to solar products and these are available online as well meanwhile there are laboratories in every city for this requirement
  • asked a question related to Biogas
Question
6 answers
I am starting to run a biogas experiment, but finding problem ordering the best lab equipment as most of what i see on the market is Chinese, and i seem not to trust Chinese stuff! so i need help locating the best apparatus for accurate results as am looking at publishing a paper out of the experiments.
Relevant answer
Answer
Charles Sendaaza There are many equipments when we talk about the Biogas laboratories however Hamit Can has cited few in the attached copies and we do also help companies and institutes/projects to install these laboratories especially to work on Biogas/Anaerobic digestion
Srinivas kasulla
+91 8317585217 (whatsapp)
  • asked a question related to Biogas
Question
8 answers
Hi All,
I am a Master student doing research in biogas and need some guidance to do my experiment.
I am researching the effects of a Pulsed Electric Field (PEF) as pretreatment of lignocellulosic biomass with the later addition of nanoparticles (magnetite) into the digester to improve the biogas and methane yield. My aim is to do this at a laboratory scale.
However, I don't know which is the equipment and tools required to conduct this experiment in the laboratory. I need to present a list to the laboratory technician so that he can assess the feasibility of doing this experiment at the lab. Based on my research and aiming to treat a small volume of biomass (1L-5L) I may require the following equipment and tools:
- A PEF device. Not sure if a simple electric circuit that generates pulses can be built at the lab and which are the materials required?. Likewise, a PEF device requires a PEF chamber to treat the material and I also don't know if this can be built at the lab or is more complicated.
- I plan to use an Erlenmeyer flask (5000ml) as the biodigester chamber. Not sure if I should use a 10,000mL flash.
- A gas analyzer to measure the biogas composition (methane and CO2, etc) during/after Anaerobic digestion. The lab doesn't have a gas chromatograph. Likewise, would it be easier and more precise if I use the water displacement method?
- As the experiment will be conducted at a mesophilic temperature I assume the Erlenmeyer (5000ml) will need to be submerged in a water bath for at least 30 days. What device or equipment I need for this? Is there any other alternative?
- Tubes, syringes, a bottle or flask to store the biogas?
Please let me know if my list is correct or I missed anything else. I am especially concern about the PEF device construction and PEF chamber as I don't have much technical knowledge in this area.
Thanks.
Relevant answer
Answer
William Anam we do provide the laboratory digester for anaerobic digestion projects and most of the laboratories in India do use our equipment and we have several models and pricing are based on the models and the requirements
  • asked a question related to Biogas
Question
3 answers
Is it possible to get a theoretical biogas yield if you change the retention time in an anaerobic process? This is assuming that I have actual data from using say, 40 days retention time and I want to find the effect of changing HRT into 20 or 60 days theoretically.
  • asked a question related to Biogas
Question
3 answers
I want to calculate the GHG emission reduction in transport after replacing diesel with Hydrogen or biomethane fuel made from green sources.
I want to find difference in GHG emission with various types of feedstocks i.e. manure, maige etc.
Relevant answer
Answer
Consider this research article for exhaustive combustion, performance and emission analysis.
It will be helpful.
"Combustion investigation of ternary blend mixture of biodiesel/n-butanol/diesel: CI engine performance and emission control"
  • asked a question related to Biogas
Question
7 answers
dear all, does anybody knows the typical size and price of an anaerobic digester to be used for local purposes? what of we it would be used in a cattle farm?
Relevant answer
Answer
Saba Gholizadeh There are many factors d on which the cost part depends right from the size of the plant, feedstock on daily basis, environment, end use of gas etc etc and to give you an example do we need based on the feedstock capacity or the digester volume.
Suppose we assume 100 cows and they produce approximately 10 kgs of cowdung per head which means the total cowdung available for gas generation is 1000 kgs and this typically has around 12-16% solids so assuming 1:1 water/recircualte/slurry we can go ahead with 2m3 * 25 days + gas volume digester design and this might roughly cost you approximately INR 4-7 lacs for the digester and other equipment and accessories separate.
  • asked a question related to Biogas
Question
4 answers
Agricultural biogas plants require a certain amount of energy, both electricity and heat, to work and produce biogas. How can I quantify this value? Not considering the energy necessary to convert biogas into electricity (biogas is addressed to upgrading) and considering agricultural substrate (cattle manure, sillage, ... ).
Relevant answer
Answer
Anaerobic digestion has two types: mesophilic and thermophilic. Thermophilic uses heat and the amount of input energy is the decision of the operator. If you're using electricity then you can determine from the rated wattage of the heater, or by measuring the current and voltage using meters to determine the electric power consumption. For mesophilic, basically no energy is used unless you count in auxiliary things such as transportation etc., which may vary depending on local conditions.
  • asked a question related to Biogas
Question
3 answers
As ADM1 needs lots of parameters related to the kinetics of chemical reactions, I am looking for some dynamic models which need less parameters than ADM1 but still give accurate results for biogas analysis and different gases contribution to the final biogas produced and their modification due to time. Is there anyone who can help me with this?
Does anybody know the parameters and constants for bio-degradation needed in ADM1 model for cattle and poultry manures?
Thank you for your time
Relevant answer
  • asked a question related to Biogas
Question
4 answers
Hello everyone,
If anyone can help me with desulfurizing my biogas in a simple way or by using equipment that I can buy from the local market, so I can rid of the correctional material to use this biogas in an electric generator, knowing that my gas production is relatively small (30 m3/day) and my raw material are only cow dung and water ?
Relevant answer
  • asked a question related to Biogas
Question
6 answers
Currently Im working on dark fermentation in the batch experiment (100 ml serum bottles). So I am wondering how long does the reaction time and if I should prepare different serum bottles for different reaction time?
Another question is what should be the best response to look for ie. COD removal efficiency, biogas percentage, H2 yield. 
Relevant answer
Answer
Hi guys. This is a great topic to discuss, in that way, to answer this question, I suggest reading the following articles:
and...
Let me know if they were helpful to you folks doing a recommendation and citation of them.
Best Regards.
  • asked a question related to Biogas
Question
9 answers
Hello everyone and thank you for reading.
For a student research project, I need data/information concerning the environmental impacts of sulphur and CO2 removal technologies used in biogas plants. The technologies analyzed in our paper are absorption in water, chemical absorption using NaOH/FeCl3/Fe(OH)3, adsorption with activated carbon, membranes and biotechnological approaches (oxygen dosing, biotrickling filter, bioscrubber).
As this description is very broad and our paper should just give an overview, I would be very thankful for any sources.
Relevant answer
Answer
Hi guys. This is a great topic to discuss, in that way, to answer this question, I suggest reading the following articles:
and...
Let me know if they were helpful to you folks doing a recommendation and citation of them.
Best Regards.
  • asked a question related to Biogas
Question
9 answers
I am currently formulating a farm model for AD of a highly biodegradable substrate of maximum biogas yield of about 485 mL biogas/gVS. I want to include a percentage to account for the headspace and would appreciate any suggested literature for the ideal headspace.
Relevant answer
Answer
Hi guys. This is a great topic to discuss, in that way, to answer this question, I suggest reading the following articles:
and...
Let me know if they were helpful to you folks doing a recommendation and citation of them.
Best Regards.
  • asked a question related to Biogas
Question
13 answers
Dear specialists in biogas upgrade, I am interested in your opinion on the economic feasibility of enriching biogas in CH4 by methanizing CO2 with hydrogen (either using CO2 as a component of biogas or CO2 resulting from the burning of biogas), on selective catalysts, at temperatures of 400-600 deg.C. Methanization of carbon dioxide at high temperatures and pressure is a well-known technique for the synthesis of CH4 but can it be applied / connected to industrial biogas plants for increasing their energy efficiency? I am particularly interested in justifying the feasibility regarding the energy balance. Thank you!
Relevant answer
Answer
Hi guys. This is a great topic to discuss, in that way, to answer this question, I suggest reading the following articles:
and...
Let me know if they were helpful to you folks doing a recommendation and citation of them.
Best Regards.
  • asked a question related to Biogas
Question
9 answers
Can anybody suggest the best Portable Biogas analyzer for the measurement of CH4 and CO2?
Relevant answer
Answer
Hi guys. This is a great topic to discuss, in that way, to answer this question, I suggest reading the following articles:
and...
Let me know if they were helpful to you folks doing a recommendation and citation of them.
Best Regards.
  • asked a question related to Biogas
Question
9 answers
Could you please share with us your latest scientific achievements (i.e. papers, books, etc) regarding anaerobic digestion technology? Your worthwhile findings would definitely respond to the need for "Engineers without borders" worldwide for tackling the energy crisis, especially in the Global South.
Plaese discuss about your achivements.
Relevant answer
Answer
Biogas recovery for sustainable ciities the critical review shared by Mariana Cardoso Chrispim is really good and am sure that might be of some help to you Dr Mohammad Javad Bardi and yes as I said it depends on personal basis and have loads of 20+ years of exp and yes I can share on individual basis whenever we can and would like to exchange ideas
+91 8317585217 (whatsapp)
  • asked a question related to Biogas
Question
6 answers
We are working on the economics of biogas plant.
Relevant answer
Answer
Navindu Gupta depends on many factors for example
size of the digester
feedstock of the plant
location of the digester
what are the separation techniques used after the slurry is generated
price of the feedstock including transportation/landing cost at site
etc etc
and once these are tabulated one can easily see based on different prices the scenarios can be drafted and selected or finlazed accordingly.
If the project is large enough and if it is in INDIA i do bjy the organic manure on regular basis.
  • asked a question related to Biogas
Question
6 answers
Hi every one
Is it possible to define biogas as a fuel in the reformer process(scwg) in Homer software?
Biogas fuel is not available in the options
thanks
Relevant answer
Answer
Amir Hossein Zakeri yes might need more details to comment on the same and yes I can help you out with the designs aswell
  • asked a question related to Biogas
Question
9 answers
I'm doing research on biogas plants (low cost-polyethylene tube digesters) and I'm trying to determine the construction time it would take to build, innoculate, and start the anaerobic digestion process.
If we need to inoculate the system first for better performance, how much time does this inoculation take? How much time will it take for bacteria to grow and start degradation if the feedstock is a mixture of feces and fat, oils, and greases?
I appreciate the help in advance.
Relevant answer
Answer
As mentioned earlier depends on many factors but 15-30 days
  • asked a question related to Biogas
Question
5 answers
When working with a high volume of organic wastewaters with TS concentration around 5-7%TS, such as cheese whey, digesters volume are very high when working with typical CSTR or plug flow digesters. Considering the homogeneous nature of these type of substrates and their properties (easy flow, no separation of phases...), I wonder if reactors such as UASB or others where there is a mechanism to differentiate solid and liquid retention time can help in reducing significantly digester volume without affecting biogas production and organic matter removal.
Relevant answer
Answer
Yes it does and also depends on the technology where I always suggest if the waste has less than 4-5% Total solid content then always one should select UASB or modified version of UASB
  • asked a question related to Biogas
Question
6 answers
dear all,
i'am searching for some good reviews in the field of hydrogen out of dark fermentation including some financial data, scale up etc. maybe some studies with comparisons between electrochemical h2 and h2 out of dark fermentation.
please share your papers with me.
beste regards
torsten
  • asked a question related to Biogas
Question
6 answers
I'm doing a research on the enhancement of biogas production using grass, chicken manure, cow dung and pig manure.I have attached the bottles with sample to a gasbag. So that afterwards the gasbag can be used to measure the volume of gas produced. I have repeated this experiment 3 times without succes. I have increased the mass and changed the temperature from mesophilic to thermophilic. After 32 days there is still no swelling of the gasbags. However in the lab near the gasbags there is a smell of gas production. 
Relevant answer
Answer
Depends on the gas bag weight
simple remove the gas or air from the bag and ensure it hangs on a support and make sure that the gas entrance into the bag is not holded automatically the gas will fill in for sure
  • asked a question related to Biogas
Question
8 answers
We know HRT of fresh cow manure to produce biogas is more than 25 days(Ambient temperature around 30 degree centigrade) . But biogas can be produced in around 2-3 days during activation period (initial period of bio-digester activation). I installed the system, put fresh cow manure in the system and start to get gas in 2-3 days.
Relevant answer
Answer
Bashu Gautam basically the balloon or the bag or the fabrics used for these type of bag digesters are usually quite thin and the temperature is maintained by exposing it to the air/atmosphere at the same time the L/D ratio is completely different in this case and more bacteria gets more surface area and thus the gas enhancement or production is seen more in this case
  • asked a question related to Biogas
Question
8 answers
I want to produce biomethane from grasses and agricultural waste.
Relevant answer
Answer
Sataluri Satagopa Raja Ayyangar most of the experts have already answered it and they are absolutely correct
  • asked a question related to Biogas
Question
3 answers
Hi,
Can someone share the Standard methods file to measure TS, VS, C/N ratio, VFA, COD, etc, during anaerobic digestion of waste in a laboratory?
Relevant answer
Answer
William Anam nice question and i do agree with Kien Vu and there are standard testing parameters available with many laboratories
  • asked a question related to Biogas
Question
4 answers
I have the daily biogas generation data for one year. From this data how to convert the GHG mitigation potentials of Biogas compared to other sources of energy like petrol, diesel, electricity etc. in terms of their particular energy conversion values for CO2 emission.
Relevant answer
Answer
https://www.eesi.org/papers/view/fact-sheet-biogasconverting-waste-to-energy this should answer or give you an idea Shrinivas Deshpande and there are many companies who do calculations based on baseline scenarios u can approach them too
  • asked a question related to Biogas
Question
4 answers
Hello
Is there paper and article that express the amount of carbon content(%) , LHV ( Lower Heating Value ) and Gasification ratio ( kggas / kgbiomass ) in fruits and vegetables waste in order to convert biomass to biogas?
Thanks
Relevant answer
Answer
Look at:
"Anaerobic Digestion of Agricultural Waste: State of the Art and Future Trends" by G. Melin & H. Bolleau
"Pretreatment Methods of Ligno-Cellulosic Biomass: A Review" By Aritra Das, Chanchal Midak and Shyamel Roy, Journal of Engineering Science and technology
  • asked a question related to Biogas
Question
12 answers
Does anyone have data or articles on carbon footprint for a whole lifecycle of a biogas plant? For other parts of lifecycle, i.e. feedstock, biogas production and so on, I can find easily. However, studies which would include also plant construction (and preferably demolition) are not available.
Relevant answer
Answer
Thanks Sanna Taskila for posting such an informative question.
  • asked a question related to Biogas
Question
2 answers
I need the guidance of PF-8000 RESPIROMETER, how to calibrate, what are the protocols and standards, and the procedure for biogas, how to monitor parameters, I mean each and everything. So, please guide me and if anyone has step by step procedure then kindly send me. Thanks
Relevant answer
Answer
Thanks but it is not enough for guidance. I need to use it for biogas
  • asked a question related to Biogas
Question
4 answers
OLR is given 3g VS/L
biogas yield 0.6L/g VS
methane content =65%
Energy content =650 Btu/ft3
Relevant answer
Answer
Assuming TS of your food waste is 18% (TS or DM)
in this case whatever u feed to the digester has to be less than 10% so 2000 lbs of food waste homogenized with either slurry of the same plant or 2000 lbs of additional water has to be crushed together and fed to the digester.
HRT has to be anything above 26 days in case of Food waste so u can consider 4000 x 25 or 4000 x 30 as the liquid volume and after this u need some volume of gas
  • asked a question related to Biogas
Question
1 answer
Hi everyone
How to model Supercritical water gasification (SCWG) process in Homer software?
Relevant answer
Answer
Did you check the possibilities of Homer pro Biomass Module to integrate this Special fiel combination?
  • asked a question related to Biogas
Question
3 answers
Joint Initiative
International Partnerships for Sustainable Societies (IPaSS)
15/02/2013
The International Development Research Centre (IDRC) and the Social Sciences and Humanities Research Council of Canada (SSHRC) are pleased to announce the International Partnerships for Sustainable Societies (IPaSS) joint initiative.
The deadline for submissions is 8 pm EST February 15, 2013.
This joint initiative will support international partnerships that will produce high-quality research to inform academic, public, and policy debates in ways that can help create just, inclusive, and sustainable social and economic development.
IPaSS thematic areas
Information and Networks: The digital revolution, characterized by the widespread use of mobile technology and the internet in the developing world, has created opportunities for disadvantaged communities to improve learning outcomes, benefit from greater government openness and accountability and create new economic prospects. Researchers will work to develop understanding of how accelerated advances in networked technologies, will transform governance, science, learning and livelihoods.
Inclusive Growth: Despite overall economic growth and fewer people living in poverty, growth has not always led to better jobs or to increased income opportunities for the poor. Researchers will seek to develop policies and practices that create decent jobs and encourage the development of enterprises, particularly for women and young people.
Governance, Security, and Justice: As some 1.5 billion people live in areas affected by violent conflict and organized crime, researchers will help States and societies build secure, equitable, and responsive societies.
Green Growth: At a time when the global economy and climate change top policy agendas around the globe, researchers will deepen understanding how societies can spur economic growth in a way that simultaneously promotes environmental sustainability.
Key eligibility criteria
Partnerships must be led by a project director based in an eligible low- or middle-income country (LMIC) and a project director based in Canada.
Application process
This funding opportunity involves a two-stage application process:
Stage 1: Letter of Intent (LOI) application
Eligible applicants must coordinate the submission and apply as follows:
1. The Canadian project director must submit a proposal on behalf of the Canadian and LMIC (Low-Medium Income Countries) partnership to SSHRC’s Partnership Grants – Letter of Intent funding opportunity. This proposal will describe in its entirety the research program, the partnership, and the budget request from SSHRC and IDRC.
2. In addition, the LMIC project director must submit the IDRC Supplementary Information Form to IDRC.
SSHRC and IDRC will combine the application forms to conduct the merit review process.
Stage 2: Formal application
Applicants who are successful at the LOI stage will be invited to submit, again jointly, a formal application. They will be given instructions on how to complete the application at that time.
Value and duration
At the LOI stage, up to 10 applicants will be awarded a grant to prepare a formal application. The value of a LOI grant is CA$20,000. However, SSHRC may consider requests of up to CA$30,000 if well justified.
Requests for support at the formal application stage would typically be in the range of CA$500,000 to CA$2,500,000 over four to seven years. The project director based in an eligible LMIC may request up to CA$1,250,000 from IDRC and the project director based in Canada may request up to CA$1,250,000 from SSHRC.
Deadline for submission: 8 pm EST, February 15, 2013
Download the IPaSS Description and the IDRC Supplementary Information Form.
Questions? Email us at cf@idrc.ca
Relevant answer
Answer
can any Indian Company support this from India?
  • asked a question related to Biogas
Question
3 answers
The biomass that I have analysed is characterized by high ash content (about 10 wt%).
I know that I could burn the residue for the evaluation of the ashes, but I have used all the residue from holocellulose evaluation procedure for other analyses.
The procedure used for holocellulose evaluation is the following
Holocellulose is a water-insoluble carbohydrate fraction of wood materials.
It can be extracted by the chlorination method by getting rid of the lignin.
A 2.5 g of extractive-free dry sample is placed in a 250 ml Erlenmeyer
flask. Then 80 ml hot distilled water, 0.5 ml acetone, and 1 g of sodium chlo-
rite (NaClO 2 ) are added to it. The mixture is heated in a water bath at 70 C
for 1 h. After this, another dose of 0.5 ml acetone, 1 g NaClO 2 are added and
heated further for 1 h. This process is repeated for 6
8 h until the lignin is
completely removed. The mixture is left for 24 h and then it is filtered through
a tarred and fritted disk glass thimble (Rowell, 2005, p. 63). The residue is
washed with acetone and left in a vacuum oven to dry at 105 C for 24 h.
ASTM E 1721 uses 72% sulfuric acid instead to hydrolyze the sample
instead of sodium chlorite used in the above process.
The solid whitish residue left on the filter gives the weight of the lignin-
free holocellulose.
Relevant answer
Answer
Hi
This reference can help you:
  • asked a question related to Biogas
Question
28 answers
My students are doing bio-gas production for their undergraduate programme; they are in need of measure the amount of production.
Relevant answer
Answer
The below links shall gie you an idea about measuring methane emissions
Thanks and regards
Srinivas Kasulla
  • asked a question related to Biogas
Question
7 answers
Good day! I want to conduct research on the multi-fuel gas turbine, tell me the compositions of various biogas for modeling the composition. and assessing the effect of fuel gas on the operation of the gas turbine.For carbon-free energy, what fuels do you think will be promising?
Relevant answer
Answer
Combustion equipment overview can be studied from this link...explained in a very good way
  • asked a question related to Biogas
Question
1 answer
Dear colleagues I want to write a review paper entitled" The potential use of biogas to meet electrical and thermal loads of building" please anyone wants distribution to inform me.to 1-Introduction 2-Evaluation the use of biogas in different parts of the world 3-Different usages of biogas 4-Recent progress in biogas production 5-Biogas fueled electrical power production systems 1-5-Micro gas turbine 2-5-Fuel cell 3-5-IC engine 6-Energy analysis of biogas fueled system 7-Exergy analysis of biogas fueled system 8-Economic analysis of biogas fueled system 9-Conclusion
Relevant answer
Answer
Good day! I am just studying the influence of various fuels on the operation of a gas turbine, it would be interesting to look at the composition of your biogas. You can jointly write an article in a magazine on the operation of a gas turbine on your train
  • asked a question related to Biogas
Question
12 answers
Currently, I'm working on biohydrogen production. I need to do gas analysis. Could any one tell me the best method for analyzing biogas (Probable mixture of CO, CO2, CH4 and H2) by using Gas Chromatography (TCD). I have nitrogen (Carrier gas) and Molecular sieve 5a (80/100 mesh) available with me.
What temperature conditions for all three (injection, column and detector), flow rate and ramp time I should follow?
Relevant answer
Answer
Natural gas is a robust form of energy which is rich in methane content and is low in impurities. ... Gas Chromatography is implemented as the optimal analytical tool for quantifying the components of the biogas including methane, carbon dioxide, hydrogen sulfide and siloxanes.
  • asked a question related to Biogas
Question
9 answers
If the gas mixture is sparged through the distilled water, would the CO2 gas being soluble in the distilled water.
I am thinking of using distilled water instead of alkaline water to purify biogas.
Could you give me suggestions on whether this method is effective or not?
Thanks
Relevant answer
Answer
There are dissolved gases in most purified water. What are they? How much is there? How do they get there? What effects do they have?
All purified water is produced by removing impurities from natural or municipal waters. We need, therefore, to consider the gases possibly present in these feed-waters, their fates as the waters is purified and any potential contamination with the same or other gases during or after purification.
Gases in Natural Waters
Natural waters are, to a greater or lesser extent, in contact with air. Most of the dissolved gases are absorbed from the air plus CO2 which can come in part from soil and rocks in contact with the water. Municipal waters are obtained by treating natural waters to make them safe to drink. These processes tend to have very little effect on the dissolved gas content of the water, generally increasing their contact with ambient air and reducing the variability due to local sources.
Every atmospheric gas is in equilibrium with that gas dissolved in water. The amount dissolved in water depends on the temperature and the partial pressure of the gas in the atmosphere.
The molar concentration of a gas, i, dissolved in water in contact with air is given by:
[gasi(aq)] = Pi/KH where Pi is its volume proportion in air and KH is its equilibrium constant.
  • asked a question related to Biogas
Question
3 answers
I'm currently designing a laboratory scale anaerobic digester with a working volume of about 7 liters. This will be used to study the decomposition of textile waste in landfills, in production of biogas and leachate quality. I'm trying to find the best/safest way to dispose of the produced biogas that others have used. I'm aware that the gas can be flared or captured for energy, but it should be scrubbed before use, which adds more moving parts to the setup. What ways have researchers found to dispose of/use this biogas?
Relevant answer
Answer
Dear Evan, I agree with Abhijeet and want to support his suggestion. As a preparation I suggest you do some math and calculate the expected volume of biogas generated in your setup. Any ideas regarding the COD in the leachate of the landfill you want to model? From what I know, about 60 to 65% of it will be converted to methane then. So you will know what do expect. If the reactor volume is 7 l liquid and you are working in batch, assuming a COD of 10 g/l, after a couple of days you will end up with 50 g biogas, assuming a density of anything around 1,2 kg/m³ you will generate from a batch 40 l of biogas.
if you are really going for it, and the university has somewhat skilled people in a workshop, you could convert a motor for RC controlled vehicles and burn the gas in it. In this case you check the gas for sulfure, in case there are sources for sulfure in your landfill.
good luck!
Johannes
  • asked a question related to Biogas
Question
7 answers
After the production of biogas from cow dung the remaining semi liquid substances in the fermentation tank are called slurry or biogas effluent. It is applied as organic manure to the soil as highly enriched with different essential plant nutrient elements. As it is made of cow dung, so it is very important to know which is better.
Relevant answer
Answer
Md. Abul Kalam Azad Biogas effluent or the slurry based on cow manure or any manure is obviously more enriched and since all the biodegradable part is digested and other compounds are also digested which other wise if applied directly with burn the leafs or have burning effect on the new leafs
  • asked a question related to Biogas
Question
8 answers
We produce biogas via anaerobic digestion of biowaste, sludge, organic matters. The produced biogas is upgraded to “natural gas standard” so called biomethane.
In the upgrading process, if I use renewable energy to compress biogas, to heat up absorbent, solvent and water.
Can I call the new biogas as “Green Methane?” Tks
Relevant answer
Answer
Luong N Nguyen Green Methane is the New Biomethane.... GREEN IS IN
yes i do agree with the above answers already cited by the experts in the field
  • asked a question related to Biogas
Question
6 answers
Biogas recovery methods are still the most usual way of extracting biogas from the landfill waste mass. However, a huge potential of biogas recovery remains inside the landfill mass. Due to the usual lack of monitoring, how efficient should we expect biogas recovery methods to be on MSW landfills?
Relevant answer
Answer
Javier Rodrigo-Ilarri Recovery of methane or biogas from MSW landfills is an interesting topic and I have been associated with a project in India where soon the recovery and upgradation shall be started...stay tuned for the results which i am gonna share within the next 4 months
  • asked a question related to Biogas
Question
11 answers
I have used 15kg vegetable waste as substrate in the anaerobic batch reactor with 5 kg cowdung as inoculum and closed it .Even after 30days the biogas is not produced and the pH level is 4 .
how can i increase the pH , even if i increase the pH does biogas production starts ?
Relevant answer
Answer
Try adding some more of the Chicken litter or Cow manure whichever is available based on the digester volume and the feed per day to the digester.
Apart from this if you are looking for immediate results try adding Lime Stone powder again you have to calculate and add it in water and then feed it to the digester.
  • asked a question related to Biogas
Question
19 answers
i made an experiment in 4 l digester with inoculum 10% V/V, the digester produced biogas in the first week but other researchers say its not possible to produce before about 21 day, any one have an explanation? 
Relevant answer
Answer
It is not surprising if you use 10% of seed sludge from existing working digester and get biogas in a week.
You also need to maintain pH, temperature, alkalinity etc for proper reaction to get the result immediately..
  • asked a question related to Biogas
Question
10 answers
I want to know if it is possible to measure biogas using GC-MS instead of GC and what is the procedure for that?
Relevant answer
Answer
Yes you can
  • asked a question related to Biogas
Question
5 answers
In the MFC reactor during the process of gas production pH value decreases only, the initial pH of the substrate was 8.32 and was not adjusted. But during the digestion process of 30 days pH value decreases up to 5.1 need to understand the reason for it.
Relevant answer
Answer
Biogas is a mixture of gases (mainly methane) produced by the breakdown of organic matter in absence of oxygen under controlled environment (pH, temp, volatile acids, HRT, OLR....).
Volatile fatty acids are the intermediate in the methane formation pathway of anaerobic digestion. We need to maintain a balance between the volatile acid produced and consumed inside the digester. If there is accumulation of volatile fatty acid then the digester pH will drop along with the COD, BOD reduction and biogas production.
So, if your digester pH is becoming acidic means there is accumulation of VFA (also reducing the alkalinity / buffering capacity) and need to find the reason by reducing the feed rate (intake of COD or BOD). The reason may be overloading, high / low temperature in the digester, dead culture (inoculum) etc...
  • asked a question related to Biogas
Question
5 answers
I need a description of how tomodify convenal natural gas stove to burn biogas for domestic cooking and heating.
Relevant answer
Answer
Methane content is biogas varies from 55% to 75% .
Our conventional gas stove need larger gas jets when it is used for biogas combustion. These stoves can be used with biogas by modifying their burner for proper combustion.
  • asked a question related to Biogas
Question
23 answers
Planning on direct conversion of domestic sewage tank to biogas production.
Relevant answer
Answer
I think it can be done with some initial design like:
1. Proper mixing arrangement
2. Biogas collection and storage
  • asked a question related to Biogas
Question
10 answers
Being a poultry farmer, I am really worried about the energy crisis - it's too hard to meet.
Relevant answer
Answer
Yes you can reduce your energy requirement by producing and using biogas from chicken litter.
Chicken litter has high nitrogen concentration. This nitrogen is converted to ammonia which inhibits the biogas production. We need to maintain a low ammonia concentration in the digester.
  • asked a question related to Biogas
Question
10 answers
I am handling an ETP of food processing plant. The COD: BOD ratio is between 3 and 4, keeps varing. I use Caustic soda for neutralization and further process is anerobic digestion folowed by anerobic digestion. I want to expand the plant by addition of one aerobic or anaerobic plant. Main aim is to reduce COD values drastically not to get biogas. Untreated water COD is about 5000 mg/Ltr
Any recommendation ?
Relevant answer
Answer
As it is well explained by other researchers that any treatment plant is designed on the input parameters of influent and the desired output parameters / results.
Operating cost of an aerobic plant is always higher than an anaerobic one.
Why you want to add a 03rd anaerobic / aerobic digester when you already have 02 anaerobic digesters? Instead you should focus on the treatment efficiency of these digesters and do any rectification (if required).
  • asked a question related to Biogas
Question
12 answers
I'm Director of Research & Development for a company that specializes in new Alternatives, Exotic and/or Green Technologies for use in Environmental Remediation, Alternative Energies, Waste-to-Energy, Compost/Biogas, Oil Spill Recovery, Water Generation (desalination alternatives) and Protective Materials for Nuclear Fallout and Contamination. Clean Nature Solutions (thecnsgroup(dot)eu) is looking for the latest technologies to help promote and utilize in various projects World Wide. Please contact me if you have something unique.
Relevant answer
Answer
Most probably degenerate parametric amplification circuits are what you are looking for.
Unfortunally for you, USA and Soviet applications are secreted, and control of energy produced by these as well.
  • asked a question related to Biogas
Question
3 answers
Is power-to-gas a possible solution to this issue? Storing renewable energy in the form of H2 and CH4 and using them as fuels can increase the penetration of renewable energy in the transportation sector?
Relevant answer
Answer
I agree with Mohammed. In addition, sustainable H2 and CH4 (from renewables) can be stored in the Natural Gas Pipeline network and underground for seasonal balancing of Electricity Demand and Supply. Sustainable H2 and methane can also power heavy duty fuel cell vehicles year-round. When wildfires and other natural disasters crash the grid, or lead to rolling preventive blackouts, the redundancy and security of the underground natural gas pipeline network and storage fields can provide stable energy supplies to distributed fuel cells.
  • asked a question related to Biogas
Question
3 answers
what will happen if we combined process of washing hydrogen sulfide from biogas and
denitrification on the WWTP line
Relevant answer
Answer
Let's not forget that the hydrogen sulfide H2S as well as the carbon dioxide CO2 in the biogas and the nitrates NO3- in the STP/WWTP are all ACID. Hence sufficient alkalinity would be needed to neutralize these. It is unlikely that the required alkalinity would be available in the sewage/wastewater after full nitrification (NH3+ > NO3-) which consumes a lot of alkalinity. Hence most likely caustic lye NaOH or lime would need to be added just for neutralisation of the wastewater.
However this does not remove/convert the H2S or NO3-.
The nitrates NO3- could in theory provide the chemical oxygen to oxidize the hydrogen sulfide H2S to sulfur S (partial oxidation) and/or to sulfate SO4-- (full oxidation). Unfortunately, the reaction rate is (very) low resulting in (very) large chemical oxidation reactors.
Instead of trying to chemically oxidizing H2S by NO3-, biological H2S oxidation would be more efficient and much faster as we apply successfully in our full scale biological biogas desulfurization units since many years (mainly in Asia).
  • asked a question related to Biogas
Question
16 answers
Dear all, i am working on matlab simulation and i need biomass plant model into it so rather than i using direct programmable source can i used this by other ways?
Relevant answer
Answer
SIMBA#biogas is a powerful biogas plant simulation software
  • asked a question related to Biogas
Question
3 answers
when we incorporate sugar straw as a co-digestion to sludge in the digestion process we expect to enhance the biogas production also change the percentage of methane in produced biogas.
Relevant answer
Answer
I would say yes- lignocellulosic content will determine biogas availability, even when the plant materials are shredded: lignin content can determine methanization level since lignin structure and/or distribution per plant-based waste material determines surface area that can be hydrolyzed from solids to acids to gas, "in time", by the mixed organisms present and where they are established in your gas production system: this would determine the methane value of the mixed materials since lignin is less responsive to enzyme hydrolyzation, protective of the materials in your mix from the (hydrolytic/acidogenic/methanogenic) microorganisms present. Also, co-digestion as suggested by Dr. Kabir could increase methanogen activity since this might allow more defined separate-phase production from hydrolyzing organisms (aerobic, acidogenic) with more reliable flow to methanogens in your system - so more reliable gas output. This does not directly address lignin content but may improve stability of methanogenesis from the materials you use or have available for gas production.
  • asked a question related to Biogas
Question
6 answers
I have pretreated my biogas feedstock using a steam explosion at various process conditions (temperature and retention time). The biogas/methane yields significantly reduced when the severity of the steam explosion was getting more and more. However, the methane concentration was constantly increased as severity increases. Is there someone who can tell me about the probable reason?
Relevant answer
Answer
For this question, I suggest reading this article:
Optimization of methane production parameters during anaerobic co-digestion of food waste and garden waste.
DOI: 10.1016/j.jclepro.2020.123130.
  • asked a question related to Biogas
Question
18 answers
Dear all,
is it possible to calculate the amount of material digested in an anaerobic digester, knowing the starting feedstock and the amount of biogas produced?
Thank you in advance
Claudio
Relevant answer
Answer
Knowing the daly biogas volume production and CH4% and CO2 % mean values.On using CH4 and CO2 densities, you can then calculate the digested mass by adding m(CH4) and m(CO2) : which are the main biogas content.
  • asked a question related to Biogas
Question
40 answers
Which kinds of biomass, byproducts and waste are the most interesting for new research development in anaerobic digestion and gasification?
Relevant answer
Answer
From a more generalized viewpoint, the promising kinds of feedstock for renewable fuels should:
  • Exploit energy plants of high heating value (HHV) and low moisture content.
  • Follow low carbon footprints.
  • Be cost-effective, in terms of feedstock transportation from the source to bio-refineries.
  • Satisfy energy demand to local and remote residential areas, having no stable connection to the mainland grid.
  • asked a question related to Biogas