Biomass - Science topic
Biomass are total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop.
Questions related to Biomass
Can I get updated allometric models developed for Ethiopia to estimate above-ground and below-ground biomass?
I need to know any method for loading of powdered metal on biomass based activated carbon?
According to the studies, we can know biomass (crop residues) technologies are high-water-consumed, and about 90% water consumed in cultivation phase, if we considered the crop residues are by-products of crops. And almost all studies point out we should reduce the irrigation water in cultivation phase so as to reduce water footprint of biomass technologies. I want to ask what's the meaning of these studies? The crop residues will always be whether we use it or not (Of course, the considtion we considered is that the use of crop residues would not cause food competition). Thus, in this condition, would this be better that we consider the crop residues as the waste, and the water consumption for crop residues is zero?
If we consider the crop residues as the waste, the biomass technologies would be not high-water-consumed compared to the traditional fossil fuel technologies. And we could try to figure out the really water-consumed process in whole system.
That's my problem and it's always bothered me. Hope your help, please!
Currently I'm synthesize an activated carbon for heavy metal from biomass. I need a verification on the way I wash my activated carbon after pyrolysis. Briefly here's my step on washing the activated carbon;
1. mix AC with deionized water
2. check the pH
3. remove the water
4. add acid to AC and mix for few minutes
5. rinse with deionized water
6. check the pH
7. repeat until it reach pH 7
Also, do I need to repeat the above steps until the mixture of AC and water turns clear even if the water already reach pH 7? Is there any recommendation for this process to be more efficient? Thank you in advance for your help. Really appreciate it.
I am getting error when trying to react gypsum with biomass (ultimate) in a Gibbs reactor.
RGIBBS DID NOT CONVERGE. MAXIMUM ITERATIONS EXCEEDED
Sugarcane filter cake is one of the sugar industry waste which produce in a large quantities and has a potency to process as a biomass. What is the future idea for the utilization of sugarcane filter cake in industry?
I am presently writing a python script DFT based microkinetic model for a biomass project I am working on. At the moment, I needed to calculate the DRC but I am having the challenge writing the appropriate code in python. I will be very grateful if anyone can assist me get pass through this stage.
I look forward to your kind response.
Hiii, I am working on the determination of kinetic parameters of biomass. I want to know is there any possibility or way that i can calculate the kinetic parameters of Biomass by using Aspen plus software like other models such as KAS OFW Coats- redfern methods? Kindly give your comment and provide some links.
I m trying to estimate the concentration of lignin in rice husk. I m using TAPPI T222 method for this purpose. On treating with 72% sulphuric acid, the husk powder is still visible. Is it correct or I m missing somewhere.
Since after this water will be added and 4 hrs boiling will be done and then protocol says to filter and weigh the filtrate. Under such condition the filtrate will have husk powder as well.
Defining the dilution factor is very important when we are working at the level of ppb (parts per billion) or ppt (parts per trillion). Other day, I was working on plant biomass samples to analyze available Si (Silicon) in plant biomass. I have gone through several steps of dilution and became so confused about what is DILUTION FACTOR. I did several dilutions at several steps (digestion, adding chemicals, again diluting to come up with the range of AAS) and it became so complicated. As always, I approached Dr. Rafael Santos and he solved this problem very easily, I would say just in 10 minutes when I was struggling for an hour. Finally, Dr. Santos made a good explanation with their whiteboard and step by step he came up with the solution. Again, doing a Ph.D. is not just collecting and analyzing data but also needs to understand the chemistry happening in between. If you don't know how to do it then seek help. Asking someone doesn't mean your basics are not strong, asking someone means you know what you're looking for but you don't know how to approach it. I am thankful to have Dr. Santos as my mentor, peer and guide. PS: Here's complex whiteboard solution in the picture :) #ppb #ppt #help #academia #PhD #chemistry #data #AAS
In the Van Soest method, after treating the biomass with NDS and ADS, the next step is the ADL analysis by acid destruction with 72% H2SO4. But during this step, my entire sample turns black like a char. So is it normal with all types of biomass or my sample is acid sensitive? Should I get correct results after following the next steps?
In ecology, we generally could observe the positive relationship between plant diversity (A) and plant biomass (B). Also, we could observe the positive relationship between plant biomass (B) and soil carbon storage (C). But here, I got a negative relationship between plant diversity (A) and soil carbon storage (C). The data is collected from field investigation of grassland.
Biochar is a stabilized, recalcitrant organic carbon compound, created when biomass is heated to temperatures usually between 300 and 1000°C, under low (preferably zero) oxygen concentrations. It is produced from a variety of biomass feedstock, such as agricultural residues, wood chips, manure, and municipal solid waste, through a variety of thermal treatments, among which slow pyrolysis is the most widely used due to its moderate operating conditions and optimization of biochar yields. Due to their unique properties (e.g., high specific surface area, microporosity, and sorptive capabilities). Primarily focused on the use of biochar as a soil amendment in agriculture.
In all the literature, I came across, I couldn't find the exact calculation for finding out the percentage of cellulose before and after extraction (from biomass) using ionic liquid.
I am growing H. psuedoflava DSM 1084 autotrophically. When I compare cell dry weight produced to CO2 consumed, I find that more CO2 is consumed than expected.
I wonder if this is because my bacteria is accumulating an intracellular storage compound like PHA. It's been suggested to me, though, that such intracellular compounds would not necessarily affect CDW that much if PHA and biomass had similar carbon oxidation states. Therefore, I would like to know:
- What is the oxidation state of carbon in PHA and in bacterial biomass? Are they far off from each other?
- Could the formation of intracellular storage compounds (PHA) affect the OD-CDW correlation factor for my bacteria?
Please I am doing GO synthesis using biomass in place of graphite. I have tried two different routes. The improved method with phosphoric acid and the modified method with sodium nitrate and double the amount of potassium per manganate. In each case after 12 hours of stirring when I add peroxide the reaction mixture doesn’t turn to yellow but black instead .
I did it the third time and allowed it to sit for 3 days before I added peroxide but it still turned black. The carbon content of the biomass is 70%. Please what do you think is causing this. I need urgent help.
I am looking into the carbon content in algal biomass. For this work, I have done the COD tests, now I need to determine the carbon content from the COD resuls.
We can assess WUE by biomass as well as by grain yield. Then why should we prefer one over the other? Is there any specific and technical reason behind it?
Are there any alternative methods (faster/convenient) to determine Soil microbial biomass, besides the traditional Fumigation-extraction method? Thank you
I have taken 0.75g biomass and hydrolyzed this in a 5 ml enzyme and buffer solution(Final), and this solution was further analyzed by DNS reagent by taking 1 ml of this and further diluted by 10 times by taking 200ul, and I have observed 715ug/ml concentration from absorption vs concentration graph. Now I need to calculate the g/g value? Could you please instruct me on how to calculate this?
In an table showing element contents of marine zooplankton published in 1985, I encountered two units: ug per gram dry weight (used for Fe, Cu, etc.) and dpm per gram dry weight (used for Pb). According to my literature search, values are in the same order of magnitude and should be comparable, but why would someone use then different units to express the same? Can I convert dpm into ug per gram dry weight? Can someone explain that to me?
Your assistance is much appreciated.
Hello everyone. I am currently carrying out a research project using the FAO's AquaCrop crop modelling software, calibrated and validated with data from field trials on wheat in Morocco. I have imported observed climate and soil data from my study site for several seasons, as well as creating several wheat crop files for different cultivars, based on field observations, taking care only to alter the cultivar specific and not the conservative crop parameters.
When I run the simulation, the harvest index seems to be constant throughout, no matter which of the three seasons I have climate data I use, or which planting date or water regime I specify. The different seasons, planting dates and water regimes obviously affect the amount of water the crop receives, and this should affect the harvest index (as indeed it does in the yield results I have from the field trials). However in my simulations the harvest index is always around 46%, just below the reference HI of 48%. The total biomass (and so yield) varies considerably, but not the HI. This is definitely not right, and is totally out of step with the field trial results, where total biomass and HI (and so yield) both vary depending on the season, water regime and planting date. I've attached two screenshots of my results from AquaCrop for two different planting dates for the same crop in the same year, where the second planting date receives much less water. The second date has much less total biomass but the same HI, which doesn't seem to be affected by the water stress at all. Has anyone else experienced a similar problem and have any ideas? Thanks very much!
I have a data set that includes percentages of algal biomass increase in a growth medium over time. In the majority of the groups, algal biomass has more than doubled and therefore percentage increase is well over the 100% mark. Moreover, my current data does not follow the equality of variance assumption of ANOVA. Will I be able to perform ANOVA with percentage data that are over 100? And if yes, what data transformations do you suggest?
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.
The question is about determining the effective particle size of biomass for a thermochemical process. can the same method of determining the fineness modulus of sand for fine, medium and coarse sand be considered here?
Microalgae considered a a noble biomass for production of high value products, food and feed, Pharmaceuticals as well as Biofuels.
I wound like to evaluate the biomass of MRSA biofilm cultured on ex vivo porcine skin tissue. I found CV stain is not suitable. Is there any other methods I can use?
I have different parameters, i.e. Shoot length, root length, F/D biomass, etc. Similarly, I have 18 varieties and each variety has 3 groups (Control group, Treatment 1, Treatment 2), each group contains 15 replicates. I want to s screen out some varieties. I don't know how to set this data in excel for PCA analysis. Here is a file in the attachment which gives the complete information. Please, guide me on how to set this data for PCA analysis?
I want to examine the relationship of wood density with tree growth rates expressed as (i) diameter growth rates and (ii) biomass growth rates. In your opinion, what would be the best way to compare these two relationships, for example in terms of strength and/or the slope. Any advice on R packages or functions would be very valuable.
I'm quite new to this topic of research. I'm seeking advice on how to increase bacterial CFU and biomass yield on a fermenter level. The bacteria is one of the Bacillus species. The current yield is around 10^8 - 10^9 CFU/ml culture (24 hours culture duration, batch fermentation using BHI broth) and the (wet) biomass is around 7-8 g/L. I'm aiming for >10^10 CFU/ml titre and >10 g/L (or even higher) biomass yield.
Hope to get some great bits of advice here. Have a nice day!
How can i calculate the stoichiometric air to fuel ratio if i have a biomass having an emperical formula of C H1,41 O0,52 N0,02 S0,016?
Not yet answered
I have a biomass with the following ultimate and proximate analisys:
Volatile Matter 57% (dry basis)
Fixed Carbon 12,19 % (dry basis)
Ash 30,81% (dry basis)
Carbon 40,44% (dry basis)
Hydrogen 4,75% (dry basis)
Oxygen 21,13% (dry basis)
Nitrogen 0,94% (dry basis)
Sulfur 1,72% (dry basis)
Cl 0,21% (dry basis)
How can i calculate the stoichiometric air (oxygen)/biomass ratio??
biomass gasification, biomass combustion, stoichiometric air fuel ratio, equivalence ratio
I am doing LIVE/DEAD staining of biofilms on different surfaces and taking z stack images by CSLM ( Olympus Fluoview FV1000).
Then I am using COMSTAT to estimate biomass thickness roughness coefficient etc.
I am following the procedure detailed on COMSTAT 2.1 manual for making the stacks and image conversion and so, but I am getting different values for these parameters depending on the channel (red of green), and the two value are sometimes very different.
Is this usual or I am doing something wrong?
I would like to count the amount of biomass for phytosociological relevés I have done on meadows last summer. I have the information about species composition, species richness, cover of herbs and graminoids and the heights of species groups. I have measured 5 heights (of randomly selected species) within each of the 4 groups of species (flowering graminoids, non-flowering graminoids, flowering herbs and non-flowering herbs). In total I have 20 different heights for each of the plots. Is it possible to count the amount of biomass for each of my relevés from the data I have? I have also counted NDVI for each of the relevés if that might help.
Thank you very much for your answers and ideas!
Mycelium is cultured on PDB medium. Mycelium biomass is extracted by simple filtration with Whatman filter paper but the live biomass contains PDB on its surface. To get clean biomass can I give the biomass an ultrasonic bath? If so, then for how long at what power and temperature?
An example of this; it would be silly to measure the weight of ship plus a person on it, and then measure the weight of a ship by itself and determine that the difference in weight measurements is the weight of the person.
I am having this type of problem during a gasification experiment where biomass is continuously fed into a reactor, and my load cell (which has the reactor placed on it) is unable to accurately detect the small changes in mass. The load cell by itself works perfectly fine and can measure objects with a precision of up to 0.5 grams. I can't seem to find an explanation as to why once something heavy is put on the load cell, it stops detecting small changes in weight.
In case if we don't get the volume equation, Biomass expansion factor and root shoot ratio for a particular species, how to calculate the carbon stock of a tree?
What are the factors on which the adsorption of toxic metal ions by the adsorbent depends??
If so ??
How is/are the mechanism of adsorption confirmed (on what basis , physical /chemical characterization using instruments or through simulation study)
For example ion exchange/ diffusion .. .. ..
Can someone kindly explain the core concept behind the adsorption of metal ion on the adsorbent (biochar,/activated carbon)
I have tried to extract nanocellulose fibres from algae powder and have yielded 15% of the total biomass taken. I want a suggestion for how to extract maximum yield of nanocellulose from it.
I would like to evaluate in the first chapter of my Ph.D. biomass availability in Togo. The one we can use to produce green hydrogen.
Thanks for helping
I would like to learn more about carbon emissions, stock related assessments based on remote sensing techniques. But most of the time for developing countries it is difficult to get above ground biomass information. And it is expensive as well as time-consuming to get in situ measurements. So, what is the best remote sensing solution for this problem?
I have been pyrolysing my biomass 3 times under the same conditions using microwave technology to compare the yield. I have noticed that the yield of the biochar changed every time. I am wondering what could be the reasons for this to happen?
MODIS-NPP algorithm is valid for biomass assessment in tropical forests? or are there any better remote sensing products? (except the Vegetation Dynamics Models to estimate NPP)
The mycelium biomass is used for heavy metal bioaccumulation in vitro settings, which will be subject to Atomic absorption spectroscopy. In order to get the dry/wet weight of mycelial biomass and to prepare samples for AAS analysis how can I separate and get clean mycelial biomass from PDB?
Anyone who can share the standards or guidelines required for wood/biomas to produce charcoal. E.g. Moisture content values, fixed carbon, volatile mater, ash of the wood.
Soil microbes help to breakdown soil organic matter and release C, N, P, and other nutrients to soil which improve soil quality and crop productivity. At the same time, this process releases CO2 to the atmosphere and high temperatures increase the microbial activity which leads to higher CO2 emission. We need to mitigate CO2 and increase soil microbial biomass to enhance soil quality and increase crop productivity, what about this dilemma? is CO2 emission will be temporary and we still need to enhance soil microbial biomass or what is happening in this process?
Thanks in advance for sharing your answer.
In most circumstances, the existence of a large diversity of soil organisms is critical for soil functions and ecological services. And the major short-term indicators of soil health include soil microbial biomass, particle organic matter, mineralizable N, and soil respiration. But how does the structure/community of soil microbiomes relate to the above-mentioned soil metrics and overall soil health status? Is there a clear link between the taxa/functional units of soil microbiomes and soil health?
If someone tries to explain something to me, I appreciate and acknowledge it!
Hello, so I am trying to develop a simple model for calculating the cooling impact of green roofs, but am having trouble trying to incorporate the variable of building height. Specifically, I am trying to find the relationship between building height and green roof cooling impact, where I could calculate how a green roof's cooling effect/impact will change based on how high up it is, such as comparing the cooling effect of a green roof on a one-story building compared to the cooling effect of the same green roof on a 10-story building. The theory and general consensus I have found throughout the literature is that the higher the green roof is off the ground, the lower its cooling impact is on reducing the urban heat island effect. If we are just talking about land surface temperature here, this would seem quite intuitive, e.g. we would want the green roof cooling to be closer to the ground where people actually need it.
The trouble I am having is finding that actual quantitative relationship between green roof cooling impact and building height, such as a specific multiplier or coefficient I could use to multiply a green roof's cooling effect by to account for its height off the ground. Would anyone know if such a relationship has actually been documented in the literature?
I have seen this paper "Impact of Morphological Characteristics of Green Roofs on Pedestrian Cooling in Subtropical Climates" by Zhang et al. (2019) that concludes the reduction in green roof cooling effect the higher the building height is:
I have also seen this paper "Effect of vegetation biomass structure on thermal performance of tropical green roof" by C.Y. Jim (2012) that describes the relationship between building height and green roof cooling effect as a "height-decay function", where the green roof cooling "decays" the higher it is off the ground:
And then this paper "Green-Roof Effects on Neighborhood Microclimate and Human Thermal Sensation" by Peng and Jim (2013) that describes that height decay as linear:
It is great to see that this important relationship between building height and green roof cooling effect has been well studied, and I can see that the consensus is that yes, the cooling effect of a green roof will be reduced as a function of how high the green roof is off the ground (if we are talking about its effect on land surface temperature). However, I cannot find in these papers or anywhere else in the literature what these coefficients, relationships, or functions actually are, such as a percentage cooling effect reduction per meter of building height, or something like that. I am looking for something that I could simply multiply a green roof cooling impact by to account for the height of the building. Would anyone know is such a quantitative relationship has been documented?
Can I extract carotenoid pigment from microalgae (C. sorokiniana and D. salina) without freeze-drying?
I already searched and read references about drying process that we can use heat-drying method but that wasn't recommended because could cause degradation of carotenoid content. So if I don't have a freeze-dryer, can still extract the pigments from wet biomass?
I’m looking for numbers (rather then general statments) on the energetic cost of different biomass pretreatments before enzyme digestion for sugar release. I am especialy intrested in steam explosion but will be glad with other pretreatment as well. Citable sources are best. I looked at paper but found mainly generlized statments (both stating “steam explosion is energy efficient” and “steam explosion is energy intensive”)... I do understand this is not a trivial question as the answer depends on biomass source, but still, any data?
This research aimed to systematically review the development studies pertaining to forest biomass and bioenergy supply chain resilience.
According to the assessment, the findings of this research on the definition, barriers and enablers of forest biomass and bioenergy supply chain resilience can be applied as a basis for the comprehension and optimization of the structure of supply chains in the forest biomass and bioenergy industries.
Please click/use the link below to freely access the article file:
I have the proximate and ultimate analysis of biomass and using this, I want to convert it into conventional components using a reactor like Ryield but I'm not able to do this calculation. Can anyone please help me with how to do it?
Thanks & Regards,
hello dear scientists,
I am facing problems to separating my nanoparticles from lignocellulosic biomass after hydrolysis. What happens is that: I apply nanocatalysts to perform the hydrolysis of plant residues, but I have difficulties to recover these same nanocatalysts because they adhere strongly to the biomass and when I bring the magnet barr close, the biomass decants along with the nanoparticles. My hypothesis is that these nanocatalysts enter the biomass pores and therefore they stick together, I thought of using some surfactant to remove the plant biomass but I don't know the validity of the technique. I've already tried using thames and filter paper but both didn't work. The picture demonstrates a flask with the biomass strongly adhered to the magnetic nanoparticles
Any insights or tips? Thank you for your attention
I m attempting to isolate lignin from waste biomass and doing a FTIR study on it. After isolation the FTIR peaks show some noise in 750 cm-1. So I need to re precipitate it to reduce the noise in FTIR. Can anybody suggest a way to do so.
I want to screen fenugreek germplasm for early seedling growth, particularly biomass. If biomass of seedling, during early stages like 7-21 days, is associated with seed weight or size, then I can avoid evaluating certain lines based on test weight or size of seed. Or these traits unrelated. Pulse crops may be useful reference.
Is there any way to determine the composition of biomass using thermogravimetry? I've tried DTG curve deconvolution using Origin software but was not able to get the correct composition. Can anyone please help with how to do this?
Thanks & Regards,
Root length, root biomass and types of root determine the nutrients absorption, tolerance to drought and lodging and ultimately optimum plant growth and productivity. Is there any simple field based procedure to grow maize plant in field and to determine total length and biomass of root? An efficient and simple protocol may help in screening maize germplasm for root parameters.
In our two -year field experiment, white clover pure stand resulted in higher biomass yield compared to its respective mixtures with grasses and as well as with the mixture of red clover with grasses. Although other legumes such as alfalfa and red clover pure stands resulted in lower biomass yield compared to their respective mixtures. However, overall alfalfa and red clover mixtures were more productive than that of mixture of white clover. What are the possible reasons for white clover to produce more biomass yield in pure stand but when it mixed with grasses its mixture produce lower biomass yield compared to the mixtures of alfalfa with grasses or red clover with grasses.
Opinion about combining rgo and carbon derived from biomass
Composite focus on watertreatment and eergy storage
In thorn forests, woody plants generally produce multiple shoots from the ground. Most of the allometric formulae are meant for the estimation of biomass of single-stemmed woody plants (usually branching above the breast height). Kindly help me in this regard. Also, I am looking for collaboration who are working on plant functional traits.