- Kostyantyn Pivnenko added an answer:MFA-studies of e-waste quantities in households' closets, garages, attics etc.?
I am looking for MFA-studies making inventories/estimations of the amounts of hibernating (i.e. not in-use) e-products in people's homes. My specific interest lies with survey/questionnaire-based bottom-up studies (preferably on rare earth metals). Recommendations on how to engage with this methods-wise are also greatly appreciated, i.e. what to think of when designing a questionnaire, pitfalls in making the quantitative estimations and so on.
I know of a few already (see below), but please provide me with more!
• Chan, M. Hibernating Copper in Connecticut Residences and Corporations. Master’s Thesis, School of Forestry and Environmental Studies, Yale University, New Haven, CT, 2004.
• Lin, C., (2008) "A model using home appliance ownership data to evaluate recycling policy performance" Resources, Conservation and Recycling 52 1322-1328.
• Milovantseva, N., and Saphores, J-D. (2012) “Time bomb or hidden treasure? Characteristics of junk TVs and of the US households who store them”, Waste Management 33(3) 519-529.
• Murakami, S., Oshugi, H., Murakami-Suzuki, R., Mukaida, A., Tsujimura, H. (2009) “Average lifespan of mobile phones in in-use and hibernating stocks in Japan”, Journal of Life Cycle Assessment, Japan 5(1) 139-145. In Japanese.
• Ongondo, F.O., and Williams, I.D. (2011) "Greening Academia: Use and disposal of mobile phones among university students" Waste Management 31 1617-1634.
• Saphores, J-D. M., Nixon, H., Ogunseitan, O.A., Shapiro, A.A. (2009) ”How much e-waste is there in US basements and attics? Results from a national survey. Journal of Environmental Management 90(11) 3322-3331.
Feng Wanga, Jaco Huismana, Ab Stevelsb, Cornelis Peter Baldéa, Enhancing e-waste estimates: Improving data quality by multivariate Input–Output Analysis. Waste Management (2013). The authors provide no quantification, but an estimation approach that could be useful in your case.Following
- Hadi Nasiri added an answer:How can I remove ethanol from water rom water waste from a petrochemical company?
We have been asked to research the removal of ethanol from water waste from a petrochemical company. They only want the water as the ethanol can be disposed of. Will RO or hyperfiltration membranes remove ethanol? We need to retain the water and not damage the membranes in any way. Salt, or sulphur ethanol-removal processes may not be viable options.
I made a pilot plant to separate ethanol from dilute mixture by pervaporation and it works well.Following
- Tuan M. Ha added an answer:Is it possible to apply the lean six sigma methods to waste management?
I'm interested to conduct a research of a lean six sigma method on the waste management especially on e-waste management.
You may also explore other systems dynamic modelling tools such as sensitivity modelling, Vensim for developing causal loop diagrams, ithink for modelling stock and flows, Netica for scenario testing, and agent-based modelling,... Those are quite handy and generic, meaning that you can apply the software in any fields (including waste management).
- Doha Hammad added an answer:What are the cheap alternatives and sustainable options available for cleanup of large-scale oil spills in developing countries?
Sustainable development assessment.
may this file help youFollowing
- Gunda Mohanakrishna added an answer:Is it possible to remove pesticides from water-logged soils using microbial assemblages?
Looking for viable options for remediation of pesticide-contaminated water-logged soils.
Here I can suggest bioelectrochemical system (BES) for the treatment of the recalcitrant and toxic compounds. This is the novel system where the complex mechanisms works for the degradation of organic molecules. Microbial fuel cells (MFCs), one of the applications of BES that treats organic pollutants and simultaneusly generates bioelectricity. Many recalcitrant organic pollutants including, chemical wastewater, distillery wastewater, dye wastewater, pesticide wastewater, phenol related wastewaters were stuided for the suitability to use as substrates. A large array of articles can be find in literature.
As the MFCs were found to perform very good in sediments and water-logged soils, MFCs is best option to work for the pesticides degradation.
Even though, the energy/bioelectricity produced is less, when the major aim is pollutant degradation, MFCs perform good. The energy input for MFC operation is minimum.
Few articles that cited below can give youbasic information
- Edward Calt added an answer:What is the environmental impact of sugar cane bagasse on soil and water pollution?I am currently looking into the potential impacts of open field burning /stockpiling and landfilling of excess bagasse on soil and water pollution.
Integrated BioChem has found most cellulosic feed stocks yield approximately 80% water, 6% methane, 4% carbon dioxide, 4% protein, 2% lipids, 2% volatile fatty acids, and 2% ash. The residual water is processed through zeolite to produce a slow release fertilizer that captures the residual phosphate and nitrate. The protein produced contains twice the protein of soybean meal. The lipids can be used for the production of biodiesel or separated into multiple applications.Following
- Omaima Sayed Hussein added an answer:What is the LJ characteristic length for limonene?
Can anybody suggest me a reference in which i can find LJ Characteristic length for Limonene ?LJ
Dear Dr. Sumanth
This book is about medicinal plants and may be useful for you. Author : Dr. Shafik Balba.
- Pouneh Shahrouz Ebrahimi added an answer:Can you suggest sources for decomposition of wet paper waste after compaction?
I am trying to develop a waste management model to support and prove the following. I am having difficult sourcing relevant literature.
1. That source separation/recycling at source results in higher quality paper products and more paper overall that can be recovered/recycled (i.e. as the paper has not decomposed or been damaged).
2. That various waste paper products rapidly decompose and lose significant value after becoming wet, dirty and compacted.
For context, the paper waste being recycled is taking place in a tropical country. Humidity rates (70%), paper moisture content rate (50%).
The type of fiber affects decomposition. Short cellulose fiber papers include newspapers. Office paper consists of long cellulose fiber papers. Cellulose is a chemical found in plant cell walls. The difference between the fiber types is that long cellulose fiber papers can be recycled more times than short and can be used for several different types of products. Short cellulose fiber products do not have this same quality and can deteriorate more quickly in landfills.
The results of the experiment reveal that the computer printer paper decomposed the most, followed by the magazine paper, and the newspaper. The results reveal that the paper towels decomposed the least.
Recycled paper and nonrecycled paper can become a variety of products. Regardless of the type of paper, coatings, adhesives and other materials can affect decomposition. Coatings such as you would find on a page in a magazine provide a barrier that can slow the breakdown of the paper, as can adhesives or other materials. Their presence affects the quality of recovered paper.
Even paper that cannot be recycled into paper anymore can become fuel, insulation or roofing. In many ways, recycled paper does not decompose as paper because it is used for something else.so for having a good composite i suggest that separate papers because some papers can't get decomposited.Following
- Rama Kant Dubey added an answer:Can you suggest a suitable plant for phytoremediation of pesticide-contaminated soils?
We are looking to model phytoremediation techniques for the remediation of soils contaminated by huge agricultural pesticides but, are looking for previous studies carried out in similar environments.
More specifically it will depend upon the type of contamination in the soil, In general you can use the Leucaena leucocephala, Jatropha curcas, Ricinus communis, Withania somnifera, Spinacia oleracia for the better uptake of the pesticide from contaminated soil.
For more detail kindly go through the following link.
- Nirmala Menikpura added an answer:Should a small island state choose a plasma gassification waste to energy plant or undertake a national zero waste initiative?
The small island state is rapidly running out of landfill space, and there is a risk of nitrates entering the water supply.
As correctly pointed out by Cebrian, gasification and pyrolysis technologies are not mature as of yet and many cities are facing problems with those technologies. Integrated waste management seems to be the most appropriate technique moving towards zero waste. Incineration with energy recovery (cogeneration) seems to be a good option, however it should design carefully to match with local conditions. Organic waste which has high moisture content should not use in incinerators as it reduces energy recovery potential. Therefore, organic waste should be separated as source and can be used to produce energy using anaerobic digestion technology or can be used as a feeding materials at animal farms (if available) .Following
- Ana Jiménez Rivero added an answer:Is anyone familiar with Material Flow Analysis method for electronic waste?
MFA is a structured material flow analysis and systematic waste management as a model elemental composition of waste and material management performance evaluation of recycling facilities and management. I want to know how the application of this method in the management of electronic waste.Following
- Amit Roy added an answer:Is plasma gassification considered a proven and sustainable technology?
The island of Barbados, which has a reasonably successful national recycling program, is proposing to construct a Plasma Gassification Waste to Energy Plant.
Plasma Gasification now is in commercial use because it has many advantages like clean destruction of hazardous waste, no harmful emission of waste except high initial cost.Following
- K V V Sagari Kudaligama added an answer:How does the UK particularly manage used engine-oils generated from vehicle garages, ship yards and industrial sites?
Interested in understanding how sustainable use of hydrocarbons are carried out to avoid environmental pollution.
We have developed a low cost sealant using used engine oil, rubber and china clay. It also has adhesive propertiesFollowing
- Marcell Nikolausz added an answer:I'm looking for the methanogenic potential of sugarcane residue or straw (Nm3Ch4/tTS)? Can someone help me?I am trying to determine the energetic power of sugarcane straw in my region, but I can't find the biogas potential.
You may check this article as well:
- Manfred Fehr added an answer:Does it make economic sense to subsidize waste items at the wholesale level in order to stimulate reverse logistics?A questionable alternative is to hand out direct financial support to recyclers.
Thank you kindly for your ideas.. You are right with the comparison of prices between virgin and recycled material. I was thinking of the costs of collection, tipping and landfill maintenance. If they are higher than a subsidy aimed at getting the materia out of town, then the subsidy seems to make sense from the point of view of the municipa budget.. Where the subsidized material would end up is another question that I have no answer for at this time. I am studying the problem and any input is welcome.
- Arun Babu Vathsalan added an answer:I m looking for any paper or formula which can provide me detail to carryout waste collection point and their mapping as a part of urban design?
We are carrying out a research on planning waste collection points at a city. So we wanted to know if any formula is there to formulate at what distance this waste collection centre can be adopted? If any guideline on the same is available? Please let me know
pls see the links. it may be useful for youFollowing
- Dushyant Panwar added an answer:Does anyone know how to fix the matter with floating particles in COD test?
Hi All, I will appreciate if anyone could share his/her experience or any info about this matter with me. I am doing COD test on some industrial waste samples. to make it economic, i make reagents solution by myself by following the standard method. after all sample and standards preparation, two hours digestion in oven , and cooling down to ambient temperature, when i was gonna transfer samples from cod vials to spectrophotometer cuvette to read the absorbency, the problems with floating particles in cuvette comes out (sedimentation). no one has faced this matter and if you know the reason or anyway that can fix it. Actually i am not using the ready COD vials with solution which is in market (like Hach) and i dont have COD spectrophotometer that be able to put COD vial directly inside to read the absorbency. i just have a general use spectrophotometer that just support its own cuvette.
I am not sure about the problem because i never face this type of problem...I am also determine the COD of industrial effluent with the help of close reflux method in this method i ti-trate the solution with FAS after 2 hour digestion, u can try this to follow APHA.Following
- Charles Anukwonke added an answer:What are the affordable soild waste managent systems for low income groups?
Research papers those are already working on it
Ketan the low income group is an issue here... Integrated Solid waste management incorporates a lot of factors including governance where the entire members of the public must be involved via campaigns/ public enlightenment and other means that facilitates attitudinal change for better and improved solid waste management in a an area.
There is also the concern on the aspects of management of the informal participants in waste management in form of scavengers to actively participate in the quest for the zero waste control and other approaches within the integrated framework.
Pls go through some of the files that have been sent to you above. some of them are so usefulFollowing
- Tinus Pulles added an answer:What are the correct emission factors for a comprehensive emission inventory in waste management covering all the processes? I need your help.
Most inventory cover only the main emissions and do not provide details. I am considering all emissions. For instance under transportation - CO2, NOx, CO, NMVOCs, HC, PM10, N2O, CH4, SO2 and NH3.
Please check http://www.eea.europa.eu/themes/air/emep-eea-air-pollutant-emission-inventory-guidebook to find a full set recent air pollutant emission estimation methods and default emission factors for all relevant processes. These methods also follow those of the IPCC 2006 Guidelines for Greenhouse Gases: http://www.ipcc-nggip.iges.or.jp/public/2006gl/index.html.Following
- Mujeeb Irukulangara added an answer:Which technology is highly adapted for Bio medical waste management in India ?
Status of Bio medical waste management in India.
We are in Saudi Arabia using Physical/chemical incineration for medical waste treatment, I was able to visit a company named 'SEPCO environment' to see their collection-transportation-incineration and disposal management. This is the company who deal with most of the hospitals in Saudi Arabia for their medical waste disposal.Following
- Attila Haris added an answer:Is there a rigorous, scientific methodology for determining the origin of beach waste/litter (e.g. moisture, density, lab based analysis)?
Most studies and guidelines I have found provide estimates on waste origin (e.g. from tourists, from ships, from the port, from dumpsites) based on the indexing of materials found and spatial analysis. Is there no way to examine specific waste items in a lab (e.g. chemical, physical analysis) to determine origin?
This could be a "bit arrogant" but in many companies from IBM to GE this is the practice. :)
1. Experts, engineers, advisors etc. receive a project
2. After their investigation they set a theory
3. To verify their theory, they send samples to labs. and they specify which tests they need and also for which componensts. (also depend on lab. prices).
4. They receive lab. results evaluate it and based on lab results:
a. modify theory or
b. find other solution for problem
c. their theory is supported by lab results in this case: project closed, problem resolved.Following
- A. Subba Rao added an answer:Circular Economy: what is beneath it? Will it solve resource challenges?
Recently, the buzz word 'circular economy' has been highly popularized, especially, in the developed countries.
Is it just another name for traditional resource recovery approaches as Costas Velis highlights in the editorial section of 'Waste Management and Research' May 2015 issue?
How will it affect already developed waste management sector in developed countries?
What can a circular economy offer to developing countries with economically inferior waste streams?
To what extent does the speed of 'circularity' matters?
The circular economy may be a better proposition for mineral nutrient like phosphorus in countries like India which are not endowed with rich reserves of rock phosphate which is the main source from which phosphate fertilizers are made.Phosphorus from plant ,animal,human and water system need to be recovered and reused.P from crop residues, animal manures, urban solid and liquid wastes including foodwaste and sewage water need to be recovered and used in agriculture.One good example is recovery of P as struvite from municipal sewage water and manure slurries and use it as fertilizer.Some countries in Europe and Japan made good progress and country like India need to take initiave in recovering and using P from urban sanitary treatment systems,manures and food waste.So circular economy as I understand is important for both developed and developing countries.Following
- Mukut Gohain added an answer:Is anyone familiar with the green disposal of both organic and inorganic wastes in bulk, of a Pharmaceutical Industry?
I want to know about convenient and efficient recent green technologies which we can use in waste disposal in bulk scale that’s generated by a chemical industry during synthesis of Active Pharmaceutical Ingredients.
Thank you Dear Franz Xaver Strohmer for response, we may contact you via your email to know details about installation and installation cost.Following
- Maibritt Pedersen Zari added an answer:What projects, designs, initiatives, research is there that investigates 'designing out waste' in the construction process?
We have been asked by the New Zealand Government, in partnership with elements of the NZ construction industry, to establish the feasibility of significantly reducing the amount of waste generated in the plasterboard and treated timber sectors.
We are seeking to do this by establishing suitable strategies, initiatives and tools for designing out waste i.e. preventing, avoiding or eliminating waste in these two sectors. The target is to reduce generated waste by 20% in these sectors by 2017.
We are well aware that designing out waste measures are already in place in several other countries around the world. As an essential first stage in our research we are seeking to find out what these are and how effective they have been. As you might be aware there are strong links between the concept of designing out waste, resource efficient design and lean design
Do you know of any research investigating Designing out Waste in the construction sector?
Thanks very much Douglas, that's very helpful! This is actually John Storey's project - I have just agreed to help out with the initial research. He will know Andy. I will pass all of this on to him. Thanks again.Following
- Mina Kolagar added an answer:Does anyone know about the advantage of statistical entropy in waste management (based on Shannon entropy) in compare to mass distribution?
Statistical entropy is used to calculate concentration or dilution of a specific component in a process but a simple mass balance gives this data too. I like to know if there is any other point that statistical entropy gives more information in compare to simple mass balance!
thank you Alessio for your comprehensive description.Following
- Miroslav Vysoudil added an answer:What is the emissivity of black liquor in order to get the image by infrared camera?
It must be known for the droplets of black liquor.
Average emisivity of water is 0,988 (see http://www.icess.ucsb.edu/modis/EMIS/html/em.html ).Following
- Alfons Buekens added an answer:Is high temperature smelting reduction of industrial waste possible?
High temperature smelting reduction is possible or not?
Oxides at high temperature are reduced to metal in the presence of carbon monoxide and hydrogen (cf. blast furnace operation).
Plasma is an expensive heating method, so other methods are much more economic. Conversely, plasma may be used to enhance already high temperatures, e.g., to ensure slag melt flow. Yes ago, this possibility was used in the Andco-Torrax plant at Créteil/Paris.Following
- Sergio E. Gómez added an answer:Why does garbage in a flowing river tends to segregate rather than distribute homogeneously in the surface?
Why the garbage in a flow river tends to segregate rather than distribute homogeneously in the surface? Is it related to the flow dynamics?
Similarly, with a forced flow field, is the second phase particles (such as SiC in Al melt) in the melt easy to segregate (in the liquid state rather than during solidification process)?
YA CONTESTE LA PREGUNTA !!!!!! S. GómezFollowing
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