Consulta: subjectFacets:"Anaerobic digester"
Registros recuperados: 8
Data/hora: 02/06/2024 01:13:40

Continuous enrichment culture and molecular monitoring to investigate the microbial diversity of thermophiles inhabiting deep-sea hydrothermal ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Postec, Anne; Urios, Laurent; Lesongeur, Francoise; Ollivier, Bernard; Querellou, Joel; Godfroy, Anne.
The microflora developing during a continuous enrichment culture from a hydrothermal chimney sample was investigated by molecular methods. The culture was performed in a gas-lift bioreactor under anaerobic conditions, at 90 degrees C and pH 6.5, on a complex medium containing sulfur as the terminal electron acceptor. Archaeal and bacterial diversity was studied. Microorganisms affiliated with the genera Pyrococcus, Marinitoga, and Bacillus were detected through DGGE analysis of 16S rDNA. Additional sequences phylogenetically related to Thermococus and epsilon-Proteobacteria were detected by cloning and sequencing of 16S rDNA from two samples of the enrichment culture. In comparison, the sequences retrieved from cloning analysis from an enrichment culture...
Tipo: Text
Palavras-chave: Sequence alignment; Anaerobic digester; Thermotogales; Thermophile; Deep sea vent.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-364.pdf

Financial Analysis of Implementing an Anaerobic Digester and Free Stall Barn System on a Mississippi Dairy Farm
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Denley,   Jonathan; Herndon,   Cary W., Jr.
The installation of an anaerobic digestion system and a free stall barn on a Mississippi dairy farm is only feasible with the presence of a cost-share plan. A 60% cost-share plan is the minimum amount of support a farmer must receive in order to install both facilities.
Tipo: Conference Paper or Presentation
Palavras-chave: Anaerobic digester; Dairy farm; Cost-share plan; Farm Management.
Ano: 2008
URL: http://purl.umn.edu/6786

Investing in Methane Digesters on Pennsylvania Dairy Farms: Implication of Scale Economies and Environmental Programs
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Leuer,   Elizabeth R.; Hyde,   Jeffrey; Richard,   Tom L.
A stochastic capital budget was used to analyze the effect of net metering policies and carbon credits on profitability of anaerobic digesters on dairy farms in Pennsylvania. We analyzed three different farm sizes—500, 1,000, and 2,000 cows—and considered the addition of a solids separator to the project. Results indicate that net metering policies and carbon credits increase the expected net present value (NPV) of digesters. Moreover, the addition of a solids separator further increases the mean NPV of the venture. In general, the technology is profitable only for very large farms (1,000+ cows) that use the separated solids as bedding material.
Tipo: Journal Article
Palavras-chave: Anaerobic digester; Stochastic capital budget model; Dairy farm; Alternative energy; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/45662

PERSPECTIVAS DE OBTENCIÓN DE ENERGÍA RENOVABLE DE LA BIOMASA DEL ESTIÉRCOL DEL GANADO LECHERO EN LA REGIÓN CENTRO-SUR DE CHIHUAHUA
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Rivas Lucero,   Bertha Alicia; Zuniga Avila,   Gabriel; Saenz Solis,   Jorge Iram; Guerrero Morales,   Sergio; Segovia Lerma,   Armando; Morales Morales,   Hugo Armando.
Currently almost all energy is provided by fossil fuels that increase greenhouse gas emissions contributing to global warming. These emissions can be reduced with the use of renewable energy produced from biomass such a livestock manure. The manure is raw material for production of electricity and thermal energy. Anaerobic digestion of waste can reduce emissions by capturing methane, a greenhouse gas produced by waste in facilities large and small scale. The South Central region of the state of Chihuahua has the potential for renewable energy production from biomass and waste are approximately 58,000 head of cattle, valuing a daily output of 2,900 m3 of sewage and 10,000 m3 of waste water can cause environmental problems. The estimated biogas production...
Tipo: Article
Palavras-chave: Anaerobic digester; Biogas; Biomass; Renewable energy.; Agribusiness.
Ano: 2012
URL: http://purl.umn.edu/120496

Carbon Markets and Methane Digesters:  Potential Implications for the Dairy Sector
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Key,   Nigel D.; Sneeringer,   Stacy E.
Anaerobic digesters that capture and burn manure methane can provide a renewable source of energy and reduce greenhouse gas emissions. Paying producers for these emission reductions—either directly or through a carbon offset market—could substantially increase digester adoption. However, there is likely to be wide variation in the scale, location, and characteristics of adopters, so these policies could have long run structural implications for the livestock sector. Using a model of digester profits and data from a nationally-representative survey of dairy operations we estimate the likely distribution of digester adoption and profits under different carbon price scenarios.
Tipo: Journal Article
Palavras-chave: Anaerobic digester; Carbon offsets; Climate change; Distribution; Livestock; Methane; Environmental Economics and Policy; Q12; Q16; Q42; Q54; Q58.
Ano: 2011
URL: http://purl.umn.edu/117952

Estudio de Factibilidad para la puesta en marcha de los Digestores Anaerobicos en Establos Lecheros en la Cuenca de Delicias, Chihuahua, Mexico
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Casas Prieto,   Miguel Angel; Rivas Lucero,   Bertha Alicia; Soto Zapata,   Manuel; Segovia Lerma,   Armando; Morales Morales,   Hugo Armando; Cuevas Gonzalez,   Martha Isela; Kiessling Davison,   Christian Mauricio.
The energetic value as end product is among several benefits from effective waste management programs at intensive feedlots. It is increasing around the world since organic waste is a source of environmental pollution. The biogas can be obtained from simple to complex scale anaerobic digesters. Currently, there is in Mexico official instruments supporting clean technologies to promote the sustainable developing at regional levels. Based on Kyoto Protocol principles, Mexico has been promoting the emissions bonus to reduce the greenhouse gases such as methane from intensive feedlots. It is understood, that feedlots are a rich source of potential green energy. There are 58 000 milking cows in active production at Delicias, Chihuahua region, it is a potential...
Tipo: Journal Article
Palavras-chave: Anaerobic digester; Biogás; Carbon credits; Feasibility; Environmental quality.; Agribusiness.
Ano: 2009
URL: http://purl.umn.edu/48604

Carbon Prices Required to Make Digesters Profitable on U.S. Dairy Farms of Different Sizes
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Lazarus,   William F.; Goodkind,   Andrew; Gallagher,   Paul W.; Conway,   Roger K.
Replaced with revised version of paper 02/15/11.
Tipo: Working or Discussion Paper
Palavras-chave: Anaerobic digester; Biogas plant; Livestock manure; Electricity; Methane; Carbon offset value; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/98628

Carbon Emissions, Renewable Electricity and Profits:   Comparing Alternative Policies to Promote Anaerobic Digesters on Dairies
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Key,   Nigel D.; Sneeringer,   Stacy E.
Biogas recovery systems that use methane from manure to generate electricity have not been widely adopted in U.S. mainly because the costs of constructing and maintaining these systems have exceeded the value of the benefits provided.  Climate change mitigation and renewable energy policies could increase profits for the operators of such systems thereby making digester adoption more widespread.  For the U.S. Dairy sector, we examine digester adoption rates, emissions reductions, net returns, electricity generation, and program costs under different policy scenarios.  We find that 3% or fewer dairies would need to adopt digesters to meet the policy goals of reducing 25% of greenhouse gas emissions from dairy manure or generating one million megawatt hours...
Tipo: Conference Paper or Presentation
Palavras-chave: Anaerobic digester; Methane; Dairy; Renewable electricity; Subsidy; Carbon offsets; Climate change; Environmental Economics and Policy; Livestock Production/Industries; Q5.
Ano: 2011
URL: http://purl.umn.edu/103440