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Friday, July 31, 2020 | History

2 edition of Methanogenesis in landfill sites. found in the catalog.

Methanogenesis in landfill sites.

Elizabeth Rosemary Fielding

Methanogenesis in landfill sites.

by Elizabeth Rosemary Fielding

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  • 23 Currently reading

Published by University of East Anglia in Norwich .
Written in English


Edition Notes

Thesis(Ph.D), University of East Anglia, School of Biological Sciences, 1988.

ID Numbers
Open LibraryOL13925553M

Methanogens, a key contributor in global carbon cycling, methane emission, and alternative energy production, generate methane gas via anaerobic digestion of organic matter. The methane emission potential depends upon methanogenic diversity and activity. Since they are anaerobes and difficult to isolate and culture, their diversity present in the landfill sites of Delhi and marshlands of Cited by: 6. A secure landfill is a carefully engineered depression in the ground or built on top of the ground) into which municipal solid wastes are put. And such landfills are constructed in such a way that the effluents from such sites (i.e. the leachate) do not contaminate the nearby environments or groundwater.

The results of technical-scale work carried out at a landfill site for municipal waste in Poland are presented. Sewage sludges (raw and digested) were introduced into the waste layer at the site and the composition of the generated biogas was determined. Addition of the sludge to the deposited waste once every 3 months assured production of biogas with methane concentration above 30% v/v, even Cited by: Landfills have between.1% and 1% oxygen as a permanent condition, according to the American EPA, after the slow decline in oxygen which follows covering of the landfill. This percentage has actually been measured by many scientists in many different studies.

  Methane can be, and often is, collected at landfill sites and used for power generation. Furthermore, methanogens break down solid waste as they go, . proportion ofdomestic refuse is disposed ofin landfills (1, 11). The methane generated by anaerobic digestion of the refuse in United Kingdom landfills is a potential energy resource of approximately 35 GJ per year (11). To realize this potential, landfill management practices should be adapted to optimize conditions for methanogenesis. Hith-Cited by:


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Methanogenesis in landfill sites by Elizabeth Rosemary Fielding Download PDF EPUB FB2

Methanogenesis, or biomethanation, is a form of anaerobic respiration that uses carbon as the terminal electron acceptor, resulting in the production of methane.

The carbon is sourced from a small number of low molecular weight organic compounds, such as carbon dioxide, acetic acid, formic acid (formate), methanol, methylamines, dimethyl sulfide, and methanethiol.

Landfill gas consists largely of methane, a gas that is formed within landfills as a result of methanogenesis that occurs during the decomposition of organic waste.

Methanogenesis can be defined as either: 1) “Bacterial conversion of methanogenic substrates [acetate, formats, hydrogen, carbon dioxide] into methane and carbon dioxide” (Leverenz et al, ); or 2) “The production of methane. Archaebacteria of the oceans also consume methane (reverse methanogenesis) and reduce the level of this environmentally undesirable gas (Hallam SJ et al Science ).

Sphagnum mosses in peat bogs cover 10–15% of their C need from the microbially liberated CO 2 (Raghoebarsing AA et al Nature [Lond] ). Enhancement of Methanogenesis at a Municipal Landfill Site by Addition of Sewage Sludge Article in Environmental Engineering Science 23(4) July with 20 Reads How we Methanogenesis in landfill sites.

book 'reads'. This occurrence could lead to long lag time before the initiation of methanogenesis and to the production of strong leachate. Simulated landfill columns with forced aeration, with natural ventilation, and with no aeration, were monitored regarding their organics degradation rate with leachate by: 7.

It was thus recommended that leachate concentrations of acetate and propionate should be closely monitored, since the onset of methanogenesis in landfill sites may be delayed by elevated levels of.

Some acetoclastic Methanosarcinales and at least one Methanogenesis in landfill sites. book of the Methanomicrobiales can also use a second pathway, methylotrophic methanogenesis, in which methanol or methylamines serve as substrates. Acetoclastic methanogenesis is most active and important in freshwater sediments and anaerobic digestors, where acetate contributes roughly two-thirds of total methane formation.

Supplemented with hundreds of helpful drawing, tables, and photos, Design of Landfills and Integrated Solid Waste Management, Third Edition is an indispensable resource for environmental engineers, hydrogeologists, and landfill operators and owners.

It is also an excellent text for environmental science and engineering courses related to waste Cited by: A landfill site is typically excavated and lined with a system that includes layers to (1) minimize the migration of leachate to the groundwater, and (2) collect leachate for treatment.

A typical cross section of a landfill is illustrated in Figure 3. Fig 4. Typical cross-section of a landfill. Daniel A. Vallero, in Waste, Landfill Design Considerations.

So-called “dry tomb” landfill designs produce strata within the bioreactor system with low moisture content. Although this decreases the amount of leachate, it also severely limits biodegradation, because moisture is a limiting factor for biofilm production and microbial metabolism.

gas regime at one landfill site was monitored over a month period via a series of probes and perforated pipes installed at three different layers as waste disposal operations progressed.

Bulk gas concentration data demonstrated that methanogenesis was evident after only ~ months. Methane production by anaerobic digestion of wastewater and solid wastes T.Z.D.

de Mes, A.J.M. Stams, J.H. Reith and G. Zeeman1 4 Introduction Anaerobic conversion of organic materials and pollutants is an established technology for envi-ronmental protection through the treatment of wastes and wastewater.

The end product is biogas. Methanogenesis in landfill sites. Author: Fielding, Elizabeth Rosemary. ISNI: Awarding Body: University of East Anglia Current Institution: University of East Anglia Date of Award: Availability of Full Text: Access from EThOS.

Abstract. Methane is a greenhouse gas contributing about 19% to the enhanced greenhouse effect (IPCC, ). Anthropogenic activities, such as rice cultivation, animal production, fossil fuel burning and waste management have resulted in a dramatic increase of the atmospheric CH 4 concentration during the last years.

Its actual concentration is ppmv, currently increasing at a rate of Cited by: This book was originally published in and was the first text to consider the definitive fundamental science of landfill biotechnology.

Since then, major research initiatives, particularly in the U.K. and South Africa, have resulted in considerable advancement in our knowledge of landfill microbiology. The Second Edition details this progress. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): period for the onset of methanogenesis and examined the scale of methane (CH4) fluxing from waste surfaces during the waste placement phases before gas control systems were installed.

The gas regime at one landfill site was monitored over a month period via a series of probes and perforated pipes installed at three. Methanogenesis or biomethanation is the formation of methane by microbes known as methanogens.

Organisms capable of producing methane have been identified only from the domain Archaea, a group phylogenetically distinct from both eukaryotes and bacteria, although many live in close association with anaerobic bacteria. The production of methane is an important and widespread form of microbial metabolism.

In anoxic environments, it is the final step in the decomposition of biomass. Methanogenesis i. Find landfill sites (waste and recycling) books and publications, the world’s largest environmental industry marketplace and information resource.

With the objective of assessing methanogenesis yield and rate under actual landfill conditions a field experiment was undertaken at the Mountain View Landfill (California). Six landfill cells each filled with approximately tons (dry weight basis) of San Francisco municipal solid waste were constructed and their performance monitored in terms of gas production, cell internal temperature, and cell settlement.

title = {Studies of methanogenesis in samples from landfills}, author = {Hartz, K.E.}, abstractNote = {Increasing demand for energy, in particular natural gas, has prompted interest in the biological convertion of organic waste materials to methane, a natural gas substitute.

Solid waste is largely organic material and therefore amenable to biological decomposition with the generation of methane under. landfills for non-hazardous waste (these landfills may be used for (i) municipal waste (ii) non-hazardous waste of any orgin, which fulfil the criteria for the acceptance of waste at landfill for non-hazardous waste set out in accordance with annex II (and Council decision /33/EC) iii).

Landfills are significant global sources of atmospheric methane, but little is known about the ecology and community structure of methanogens in these sites. Here, we investigated the methanogen community based on methyl coenzyme M reductase A gene amplicons in the vertical profiles of three different sites at a municipal landfill complex in by: 1.Most of this landfill methane currently comes from developed countries, where the levels of waste tend to be highest.

Landfills provide ideal conditions for methanogenesis, with lots of organic material and anaerobic conditions prevalent. The huge amounts of waste that are buried in landfill sites can mean that methane is produced for years.