Consulta: subjectFacets:"Anaerobic digestion"
Registros recuperados: 36
Data/hora: 11/06/2024 11:53:51

Hydrothermal multivariable approach: Full-scale feasibility study
Provedor de dados: 69
Autores: Pérez-Elvira,Sara I; Fernández-Polanco,Fernando; Fernández-Polanco,María; Rodríguez,Pilar; Rouge,Philippe.
A process configuration combining thermal hydrolysis (TH) and anaerobic digestion (AD) of sludge has been studied with the objective of analysing the feasibility of the technology for full scale installations. The study has been performed through pilot scale experiments and energy integration considerations, and a scheme of the most profitable option is presented: thermal hydrolysis unit fed with 7% total solids (TS) secondary sludge, anaerobic digestion of the hydrolysed sludge together with fresh primary sludge, and a cogeneration unit to produce green electricity and provide hot steam for the thermal hydrolysis process. From a technical and practical point of view, the process scheme proposed is considered to be feasible. Based on the results of the...
Tipo: Journal article
Palavras-chave: Anaerobic digestion; Biogas; Sludge; Sludge properties; Thermal hydrolysis.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000400007

Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
Provedor de dados: 69
Autores: Chelme,Susana; Fonseca,Pamela; Mercado,Rodrigo; Alarcon,Nelson; Sánchez,Omar.
The effect of sequencing batch reactor (SBR) operating conditions on sludge macromolecular composition and the effect of sludge macromolecular composition on the anaerobic degradation of the sludge produced in SBR was investigated in this work. A SBR, fed with synthetic wastewater, was operated at different air flow rates. The resulting sludge was analyzed in terms of protein, carbohydrate, phospholipid and polyhydroxybutyrate concentrations. Methane production during anaerobic digestion of the sludge was also measured. Ammonium, nitrite, nitrate, dissolved oxygen and chemical oxygen demand (COD) track studies in the SBR were carried out in order to relate SBR performance and sludge macromolecular composition. The lowest air flow rate at which the SBR was...
Tipo: Journal article
Palavras-chave: Anaerobic digestion; Sequencing batch reactor; Sludge.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000300010

Effect of sulphate concentration and sulphide desorption on the combined removal of organic matter and sulphate from wastewaters using expanded granular sludge bed (EGSB) reactors
Provedor de dados: 69
Autores: Valdés,Freddy; Muñoz,Edmundo; Chamy,Rolando; Ruiz,Gonzalo; Vergara,Christian; Jeison,David.
During the application of anaerobic processes to high sulphate concentration wastewaters, operational problems are expected due to the occurrence of sulphate reduction. Sulphide production reduces effluent quality and may produce inhibition. The application of Expanded Granular Sludge Bed (EGSB) reactors for the combined removal of organic matter and sulphate was studied at different COD/sulphate and 3 values of pH. During the EGSB reactor operation, most of the sulphide remains in the liquid phase reducing effluent quality. The inclusion of a desorption column in the recirculation of the EGSB reactor promotes mass transfer to the gas phase, reducing the sulphide concentration in the liquid phase, significantly decreasing the chemical oxygen demand of the...
Tipo: Journal article
Palavras-chave: Anaerobic digestion; EGSB; Sulphate reduction; Sulphide.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400004

PCR-based DGGE and FISH analysis of methanogens in an anaerobic closed digester tank for treating palm oil mill effluent
Provedor de dados: 69
Autores: Tabatabaei,Meisam; Zakaria,Mohd Rafein; Rahim,Raha Abdul; Wright,André-Denis G.; Shirai,Yoshihito; Abdullah,Norhani; Sakai,Kenji; Ikeno,Shinya; Mori,Masatsugu; Kazunori,Nakamura; Sulaiman,Alawi; Hassan,Mohd Ali.
16S ribosomal RNA (rRNA)-targeted fluorescent in situ hybridization combined with polymerase chain reaction (PCR)-cloning, light microscopy using Gram stains, scanning electron microscopy and denatured gradient gel electrophoresis were used to reveal the distribution of methanogens within an anaerobic closed digester tank fed with palm oil mill effluent. For specific detection of methanogens, 16S rRNA-cloning analysis was conducted followed by restriction fragment length polymorphism (RFLP) for presumptive identification of methanogens. To cover the drawbacks of the PCR-cloning study, the organization of the microorganisms was visualized in the activated sludge sample by using fluorescent oligonucleotide probes specific to several different methanogens,...
Tipo: Journal article
Palavras-chave: Anaerobic digestion; DGGE; FISH; Methanogens; POME.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000300012

Cassava starch extraction effluent treatment in a one phase tubular horizontal pilot reactor with support medium
Provedor de dados: 70
Autores: Kuczman,Osvaldo; Tavares,Maria H. F.; Gomes,Simone D.; Guedes,Luciana P. C.; Grisotti,Geovane.
The cassava starch industries generate a large volume of wastewater effluent that, stabilized in ponds, wastes its biogas energy and pollutes the atmosphere. To contribute with the reversion of this reality, this manipueira treatment research was developed in one phase anaerobic horizontal pilot reactor with support medium in bamboo pieces. The reactor was excavated into the ground and sealed with geomembrane in HDPE, having a volume equal to 33.6 m³ and continuous feeding by gravity. The stability indicators were pH, volatile acidity/total alkalinity ratio and biogas production. The statistical analyses were performed by a completely randomized design, with answers submitted to multivariate analysis. The organical loads in COD were 0.556; 0.670; 0.678 and...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Biodigester; Biogas; Anaerobic digestion; Cassava; Cassava wastewater.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600021

Performance of UASB reactors in two stages followed by post-treatment with activated sludge in wastewater batch of wet-processed coffee
Provedor de dados: 70
Autores: Bruno,Marcelo; Oliveira,Roberto A. de.
In this study it was evaluated the efficiency of the treatment of wet-processed coffee wastewater in upflow anaerobic sludge blanket (UASB) reactors in two stages, in bench scale, followed by post-treatment with activated sludge in batch. The first UASB reactor was submitted to an hydraulic retention time (HRT) of 6.2 d and organic loading rates (OLR) of 2.3 and 4.5g CODtotal (L d)-1, and the second UASB reactor to HRT of 3.1 d with OLR of 0.4 and 1.4g CODtotal (L d)-1. The average values of the affluent CODtotal increased from 13,891 to 27,926mg L-1 and the average efficiencies of removal of the CODtotal decreased from 95 to 91%, respectively, in the UASB reactors in two stages. The volumetric methane production increased from 0.274 to 0.323L CH4 (L...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Methane; Nitrogen; Phosphorus; Phenols.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400020

ENERGY POTENTIAL OF BIOGAS FROM PIG FARMS IN THE STATE OF MINAS GERAIS, BRAZIL
Provedor de dados: 70
Autores: Sousa,Izabelle de P.; Rosa,André P.; Borges,Alisson C.; Renato,Natália dos S.
ABSTRACT Pig farming stands out as an alternative for decentralized electrical energy production from the use of biogas energy. However, its use is still limited. Thus, this study aimed to estimate and map the biogas production, as well as determine the electric power originated by the use of biogas produced in covered lagoon biodigester from pig farms of different sizes in the state of Minas Gerais, Brazil. The research was based on data provided by the Instituto Mineiro de Agropecuária (IMA). Three forms of electric power were estimated, as follows: (i) total, (ii) current, and (iii) installed. They were estimated from the volume of manure generated at each development stage of the animals. The total electric power corresponded to 31 MW, while the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Covered lagoon biodigester; Energy recovery; Biogas; Pig farming.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300396

Performance of UASB reactors in two stages under different HRT and OLR treating residual waters of swine farming
Provedor de dados: 70
Autores: Urbinati,Estevão; Duda,Rose M.; Oliveira,Roberto A. de.
In this study it was evaluated the effects of hydraulic retention time (HRT) and Organic Loading Rate (OLR) on the performance of UASB (Upflow Anaerobic Sludge Blanket) reactors in two stages treating residual waters of swine farming. The system consisted of two UASB reactors in pilot scale, installed in series, with volumes of 908 and 188 L, for the first and second stages (R1 and R2), respectively. The HRT applied in the system of anaerobic treatment in two stages (R1 + R2) was of 19.3, 29.0 and 57.9 h. The OLR applied in the R1 ranged from 5.5 to 40.1 kg CODtotal (m³ d)-1. The average removal efficiencies of chemical oxygen demand (COD) and total suspended solids (TSS) ranged, respectively, from 66.3 to 88.2% and 62.5 to 89.3% in the R1, and from 85.5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Swine excrements; Methane gas; UASB reactors in series; Two stage treatments.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200015

Biodegradabilidade anaeróbica dos resíduos provenientes das cadeias produtivas dos biocombustíveis: línter.
Provedor de dados: 14
Autores: LEITAO, R. C.; COSTA, A. G.; CASSALES, A. R.; ALEXANDRE, L. C.; PINHEIRO, F. G. C.; PINHEIRO, G. C.; VIANA, A. F.; SANTAELLA, S. T.; SANTOS, A. B. dos; ROSA, M. de F.
bitstream/item/103341/1/BPD13016.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Resíduos lignocelulosicos; Biocombustível de segunda geração; PPM; Lignocellulosic waste; MPP; Second-generation biofuel.; Digestão Anaeróbia; Metano.; Anaerobic digestion; Methane.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/982117

Produção de hidrogênio e metano a partir de glicerol oriundo de biodiesel.
Provedor de dados: 14
Autores: LEITAO, R. C.; VASCONCELOS, E. A. F.; VIANA, M. B.; VALE, M. S.; MEDERO, R. I. D.; PINHEIRO, G. C.; FREITAS, I. B. F.; DANTAS, L. P.; NUNES, V. F.; SANTAELLA, S. T.
O glicerol oriundo da produção de biodiesel é uma fonte renovável de carbono para produzir energia via digestão anaeróbia. O objetivo deste trabalho foi maximizar a geração de energia por meio da produção de hidrogênio e metano a partir de glicerol residual proveniente da indústria de biodiesel. Utilizaram-se dois reatores UASB, em escala de laboratório, sendo um hidrogenogênico e outro metanogênico.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Digestão Anaeróbia; Glicerina; Biogás; Biocombustível; Anaerobic digestion; Biofuels.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1102061

Tratamento de dejetos no âmbito do programa do ABC.
Provedor de dados: 14
Autores: BARROS, E. C.; NICOLOSO, R. da S.; HIGARASHI, M. M.; KUNZ, A.
bitstream/item/135752/1/final7572.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Biodigestão anaeróbica; Manejo de dejetos.; Biogás; Compostagem.; Waste treatment; Anaerobic digestion.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1031844

Estudo interlaboratorial em digestão anaeróbia: relato de atividades e desempenho em 2014.
Provedor de dados: 14
Autores: STEINMETZ, R. L. R.; KUNZ, A.; AMARAL, A. L. do; TÁPPARO, D. C.; CORREA, J. C.; GASPARETO, T. C.; SOARES, H. S.
bitstream/item/135071/1/edit7954.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Digestão anaeróbica.; Biometano; Biogás; Dejeto; Biodigestor; Experiência de laboratório.; Animal wastes; Anaerobic digestion; Laboratory experimentation.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1030914

Biodegradabilidade anaeróbia dos resíduos provenientes das cadeias produtivas dos biocombustíveis: bagaço de cana-de-açúcar.
Provedor de dados: 14
Autores: LEITAO, R. C.; COSTA, A. G.; CASSALES, A. R.; ALEXANDRE, L. C.; PINHEIRO, F. C. C.; PINHEIRO, G. C.; VIANA, A. F.; SANTAELLA, S. T.; SANTOS, A. B. dos; ROSA, M. de F.
bitstream/item/98675/1/BPD13009.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Digestão anaeróbica; Resíduos lignocelulósicos; Biocombustível de segunda geração; PPM; Lignocellulosic waste; Second-generaltion biofuel.; MPP; Metano.; Anaerobic digestion; Methane.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/981748

Carbon conversion efficiency and population dynamics of a marine algae–bacteria consortium growing on simplified synthetic digestate: First step in a bioprocess coupling algal production and anaerobic digestion
Provedor de dados: 5
Autores: Vasseur, Christophe; Bougaran, Gael; Garnier, Matthieu; Hamelin, Jérôme; Leboulanger, Christophe; Le Chevanton, Myriam; Mostajir, Behzad; Sialve, Bruno; Steyer, Jean-philippe; Fouilland, Eric.
Association of microalgae culture and anaerobic digestion seems a promising technology for sustainable algal biomass and biogas production. The use of digestates for sustaining the growth of microalgae reduces the costs and the environmental impacts associated with the substantial algal nutrient requirements. A natural marine algae–bacteria consortium was selected by growing on a medium containing macro nutrients (ammonia, phosphate and acetate) specific of a digestate, and was submitted to a factorial experimental design with different levels of temperature, light and pH. The microalgal consortium reached a maximum C conversion efficiency (i.e. ratio between carbon content produced and carbon supplied through light photosynthetic C conversion and acetate)...
Tipo: Text
Palavras-chave: Optimization; Nannochloris; Heterotrophic bacteria; Anaerobic digestion; Bioenergy.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19642/17419.pdf

開発途上国における家畜糞尿からのバイオガス生産とその展望
Provedor de dados: 19
Autores: Ishibashi, Kenichi; Day, Donald L; Zhang, Ruihong; Hironaka, Kazunori; Koaze, Hiroshi.
Fuel, feed, and fertilizer are critical resources that often must be imported. Especially for agriculturalists in developing countries, the high cost of these resources and high interest rates create significant economic problems.     These economic problems, the decreased availability of renewable sources of fuel, and the need for pollution control and fertilizer conservation have forced people to look for new sources of these resources. Methane fermentation technology is one alternative that has received widespread interest in developing countries because it converts locally available byproducts into fuel, feed, and fertilizer. Through a microbial process, agricultural waste material and byproducts can be converted into valuable products. This conversion...
Palavras-chave: Biogas; Anaerobic digestion; Livestock waste; Digester tank; Economics; バイオガス; 嫌気性消化; 家畜糞尿; 消化槽; 経済性.
Ano: 1992
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1884

乳牛スラリーの中温嫌気発酵における発酵温度の影響
Provedor de dados: 19
Autores: Umetsu, Kazutaka; Takahata, Hidehiko; Kawamoto, Tsunemi; 梅津, 一孝; 高畑, 英彦; 川本, 常美.
Palavras-chave: Biogas; Methane gas; Anaerobic digestion; Dairy slurry.
Ano: 1992
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1694

Effects of premixing digested and raw cow slurry for anaerobic digestion
Provedor de dados: 19
Autores: Umetsu, Kazutaka; Takahata, Hidehiko; Kawamoto, Tsunemi; Sato, Tetsuya; 梅津, 一孝; 高畑, 英彦; 川本, 常美; 佐藤, 哲也.
Palavras-chave: Biogas; Methane gas; Premixing; Anaerobic digestion; Cow slurry.
Ano: 1990
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1636

Expanding biogas on UK dairy farms: a question of scale
Provedor de dados: 31
Autores: Butler,   Allan J.; Hobbs,   Phil; Winter,   Michael.
Expanding Anaerobic Digestion (AD) in the UK will not only depend upon finding appropriate economic structures to support on‐farm developments but also an appreciation of environmental issues such as less Greenhouse Gas (GHG) emissions; reduced use of artificial fertilisers; and better management of farm wastes. At the core of this paper is the Anaerobic Digestion Analytical Model (ADAM) that examines the economic and environmental impacts of integrating AD into UK farming systems. However, the average dairy farm in the UK is not of sufficient size to enable profitable biogas production. Indeed, farm size, as represented by FBS/FAS data used in ADAM, needs to be scaled by three to four times for a biogas enterprise to break‐even. To boost profitability,...
Tipo: Conference Paper or Presentation
Palavras-chave: Anaerobic digestion; Biogas; Dairy farming; Carbon dioxide; Nutrients; Digestate; Environmental Economics and Policy; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/108937

Economic feasibility of converting cow manure to electricity: A case study of the CVPS Cow Power program in Vermont
Provedor de dados: 31
Autores: Wang,   Qingbin; Thompson,   Ethan; Parsons,   Robert L.; Rogers,   Glenn.
A case study of the Central Vermont Public Service Corporation (CVPS) Cow Power program examines the economic feasibility for dairy farms to convert cow manure into electricity via anaerobic methane digestion. The study confirms that it is technically feasible to convert cow manure to electricity on dairy farms but the economic returns highly depend on the base electricity price paid by CVPS, premium rate paid by CVPS customers, financial supports from government agencies and other organizations, and sales of the by-products of methane generation. Lessons learned from this program will be useful to other dairy farms and communities interested in converting cow manure into electricity.
Tipo: Conference Paper or Presentation
Palavras-chave: Anaerobic digestion; Dairy farms; Renewable energy; Economic feasibility; Vermont.; Agricultural Finance; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011
URL: http://purl.umn.edu/104564

Carbon and Energy Life-Cycle Assessment for Five Agricultural Anaerobic Digesters in Massachusetts on Small Dairy Farms
Provedor de dados: 31
Autores: Morris,   Chelsea; Jorgenson,   William; Snellings,   Sam.
www.ifama.org
Tipo: Journal Article
Palavras-chave: Anaerobic digestion; Co-digestion; Dairy operations; Food processing; Greenhouse gas emissions; Net energy gain; Farm Management; Livestock Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/93563

Crude glycerin in anaerobic co-digestion of dairy cattle manure increases methane production
Provedor de dados: 63
Autores: Simm,Silvana; Orrico,Ana Carolina Amorim; Orrico Junior,Marco Antonio Previdelli; Sunada,Natália da Silva; Schwingel,Alice Watte; Mendonça Costa,Mônica Sarolli Silva de.
ABSTRACT Anaerobic digestion of crude glycerin (CG) along with animal waste has been an excellent option for increasing the production of biogas and methane to achieve efficiency in the treatment of both residues. This study aimed to evaluate improvements in specific productions of biogas and methane, reductions in solid and fibrous components in substrates prepared with dairy cattle manure and CG (containing 14 % glycerol). With these residues, experimental substrates were prepared and placed in 25 batch digesters. Initial content of the TS in the influent was 4 % and CG was added in increasing doses (0, 5, 10, 15 and 20 % relative to total solids (TS) of the influent). Results were submitted to ANOVA and orthogonal contrasts to assess the effects of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycerol; Biogas; Anaerobic digestion; Solids.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000300175

Phosphorus distribution and availability in untreated and mechanically separated biogas digestates
Provedor de dados: 63
Autores: Bachmann,Silvia; Uptmoor,Ralf; Eichler-Löbermann,Bettina.
ABSTRACT Biogas digestates contain valuable nutrients but also have high water contents. Di-gestates were sampled from two different biogas facilities before and after solid-liquid separation and were analyzed with regard to their composition and phosphorus (P) fractions. Additionally, to investigate the P fertilizer effects of these digestates in comparison with undigested slurry or TripleSuper-P (TSP), they were applied in a pot experiment (6 kg soil per pot) in an amount corresponding to 200 mg P per pot in combination with various crops (amaranth, maize, maize + beans mixed cropping, sorghum). A separation of digestates resulted in higher P concentrations of the solid fraction in comparison with the liquid fraction. The proportion of the readily...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus fractions; Anaerobic digestion; Amaranth; Mixed cropping; Soil enzymes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100009

Treatment of swine manure: case studies in European’s N-surplus areas
Provedor de dados: 63
Autores: García-González,Maria Cruz; Riaño,Berta; Teresa,Marta; Herrero,Eva; Ward,Alastair James; Provolo,Giorgio; Moscatelli,Giuseppe; Piccinini,Sergio; Bonmatí,August; Bernal,María Pilar; Wiśniewska,Hanna; Proniewicz,Marcin.
ABSTRACT In this study, eight different manure treatment plants were monitored. The plants were four on-farm and four centralized treatment plants, all of them at full-scale level. Assessment includes a total of seven pre-treatment and process units as follows: mechanical separation, with and without coagulant and flocculant addition, pasteurization, nitrification-denitrification, anaerobic digestion, and composting. The plants are located in nutrient surplus areas of three European Member States (Spain, Italy and Denmark), the majority of these areas being Nitrate Vulnerable Zones (NVZ). Results presented herein are data collected over a six-month period and comprise performance data of the treatment plants, pathogen indicators (E.coli and Salmonella) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Greenhouse gas reduction; Manure treatment technologies; Anaerobic digestion; Composting; Nitrification-denitrification.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500444

Characterization of brewery waste water and evaluation of its potential for biogas production
Provedor de dados: 111
Autores: Murunga, Sylvia Injete; Mbuge, Duncan Onyango; Gitau, Ayub Njoroge; Mutwiwa, Urbanus Ndungwa; Wekesa, Ingrid Namae.
The issue of global warming and climate change is strongly receiving public attention and has become a major environmental concern both nationally and internationally. Brewing industries are among the largest consumers of water and the largest source of organic effluent mostly from the brewing, cleaning, and cooling processes which must be treated to allowable levels to reduce environmental pollution. Close to 10 L water is used for every 1 L beer that is brewed, though the amount of water in the final beer is small. A study was undertaken to characterize and assess the variations in the quality of untreated brewery waste water. Samples from different process streams including brewing line, clean in place line and mixing line from two brewing industries in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brewery; Physicochemical characterization; Waste water; Pollution; Biodegradable; Anaerobic digestion.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3759

Experimental evaluation of substrate’s particle size of wheat and rice straw biomass on methane production yield
Provedor de dados: 111
Autores: Chandra, Ram; Takeuchi, H.; Hasegawa, T.; Vijay, V. K.
This paper examines the effect of particle sizes in substrates on methane production yields of wheat and rice straw biomass without any other applied pretreatment. Anaerobic digestion of three different mean particle size (MPS) substrate of 1.5 mm, 0.75 mm, and 0.30 mm of wheat and rice straw biomass was carried out at 37 oC mesophilic temperature. The observed result revealed that mean particle size of 0.30 mm, and 0.75 mm had increased methane production yield by 4.7%, and 38.7%, respectively, compared to 1.50 mm particle size of wheat straw. However, in case of rice straw substrates the methane production yield was found 7.9%, and 13.0% higher, respectively, for mean particle size of 0.30 mm, and 0.75 mm, compared to 1.50 mm particle size. Mean particle...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergy; Biogas production from lignocellulosic biomass wheat and rice straw; Biomass particle size; Anaerobic digestion; Methane yield.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2844

Batch anaerobic digestion of banana waste - energy potential and modelling of methane production kinetics
Provedor de dados: 111
Autores: Khan, Muhammad Tahir; Brulé, Mathieu; Maurer, Claudia; Argyropoulos, Dimitrios; Müller, Joachim; Oechsner, Hans.
Different fractions of banana (stalk, peel, and flesh) as well as the whole unpeeled banana were studied in a laboratory Biochemical Methane Potential (BMP) assay. After completion of 35-day digestion at 37°C in 2L-reactors, specific methane yields reached 0.256, 0.322, 0.367 and 0.349 m³/kg VS (volatile solids) for stalk, peel, flesh, and unpeeled banana respectively. Considering the country of Uganda, East Africa, the collection of peels and stalks from banana production would yield a theoretical potential of about 60 GWh of electrical energy per year in biogas plants. In order to verify the suitability of banana fractions to the biogas process, their chemical composition was analyzed, and their methane production kinetics was estimated with exponential...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy biogas; Anaerobic digestion; BMP assay; Model; Energy; Methane; Waste.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3244

Anaerobic co-digestion of cocoa husk with digested swine manure: evaluation of biodegradation efficiency in methane productivity
Provedor de dados: 111
Autores: Darwin, Darwin.
The purpose of this study was to investigate the potential of methane production from anaerobic co-digestion of coco husk with digested swine manure.  The experiment was set up in the batch system.  Inoculum utilized in this experiment was derived from semi-continuous reactor run at steady state condition, with 25 days of hydraulic retention time and mesophilic condition.  The temperature applied in this experiment was maintained under mesophilic condition, which was 35oC.  The highest methane productivity generated from anaerobic co-digestion of cocoa husks (CH) with digested swine manure was 345.8 ± 7.82 mL/day, which was higher compared with the anaerobic digestion of digested swine manure alone (286.97 ± 16.8 mL/day).  CH reactors had less methane...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Methane production anaerobic co-digestion; Cocoa husk; Methane production; Biodegradation efficiency.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3724

Methane Production by the Anaerobic Digestion of Tall Fescue samples pre- and post-ensiling, prepared by Thermal (40°C) or Freeze Drying
Provedor de dados: 111
Autores: McEniry, Joseph; O'Kiely, Padraig.
Herbage samples for small-scale batch digestion tests are often dried and milled to provide smaller representative sub-samples for analyses.  Thermal drying, however, can change the chemical composition of a feedstock and these changes may impact on specific CH4 yield.  Consequently, freeze drying is often the preferred system for drying grass samples.  However, additional difficulties are encountered when evaluating silage samples as a result of the loss of volatile compounds during both thermal and freeze drying.  As grass and grass silages are readily used as feedstocks for biogas production, the impact of drying method needs to be considered for herbages pre- and post-ensiling.  This study investigated the effects of thermal (40ºC) and freeze drying on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture; Biogas grass; Grass silage; Thermal drying; Freeze drying; Anaerobic digestion; Biogas.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2196

Effects of full-scale substrate pretreatment with a cross-flow grinder on biogas production
Provedor de dados: 111
Autores: Mönch-Tegeder, Matthias; Lemmer, Andreas; Jungbluth, Thomas; Oechsner, Hans.
The enhancement of the degradation rate of energy crops, agricultural residues and manure by different lab scale pretreatment pathways is shown in previous studies.  In general, the pretreatments resulted in higher degradation efficiencies and an increase in methane yield for lignocellulosic and fibrous biomass.  The major drawback of most of the different pretreatment methods is that either they are not feasible for application in practice or the high energy demand makes them economically inefficient.  The aim of this study was to evaluate the effects of a full-scale mechanical pretreatment with a cross-flow grinder on commonly used energy crops (maize silage, grass silage and rye grain silage) and horse manure. Furthermore, the optimal treatment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Biogas production; Mechanical pretreatment; Lignocellulosic materials; Horse manure.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2927

Novel system for demand-oriented biogas production from sugar beet silage effluent
Provedor de dados: 111
Autores: Kumanowska, Elzbieta.
In recent years, the concept of flexible electricity production from renewable energy sources has gained popularity in the field of renewable energy supply. This study investigated a new system for flexible biogas production in praxis scale biogas plants involving new sugar beet storage processes aiming on the use of produced sugar beet silage effluent. Both processes showed successful ensiling with moderate losses compared to conventional sugar beet storage processes. A clear advantage was found in the use of washed and chopped sugar beet for silage effluent production. Thanks to the high COD-content and high digestibility, the produced silage effluent was applicable for point feeding. The system’s response, observed as an increase in gas production, was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Biogas production; Full-scale; Demand-oriented; Sugar beet silage effluent; Point feeding.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5471

Microbial succession within an anaerobic sequencing batch biofilm reactor (ASBBR) treating cane vinasse at 55ºC
Provedor de dados: 52
Autores: Ribas,Maria Magdalena Ferreira; Chinalia,Fabio Alexandre; Pozzi,Eloisa; Foresti,Eugenio.
The aim of this work was to investigate the anaerobic biomass formation capable of treating vinasse from the production of sugar cane alcohol, which was evolved within an anaerobic sequencing batch biofilm reactor (ASBBR) as immobilized biomass on cubes of polyurethane foam at the temperature of 55ºC. The reactor was inoculated with mesophilic granular sludge originally treating poultry slaughterhouse wastewater. The evolution of the biofilm in the polyurethane foam matrices was assessed during seven experimental phases which were thus characterized by the changes in the organic matter concentrations as COD (1.0 to 20.0 g/L). Biomass characterization proceeded with the examination of sludge samples under optical and scanning electron microscopy. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Adaptation phase; Wastewater; Sugar cane; Biofilm; Microbiology.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400028

Use of cassava wastewater treated anaerobically with alkaline agents as fertilizer for maize (Zea mays L.)
Provedor de dados: 52
Autores: Ribas,Maria Magdalena Ferreira; Cereda,Marney Pascoli; Villas Bôas,Roberto Lyra.
The wastewater of the processing of cassava's flour (manipueira) was submitted to the anaerobic treatment in two phases: acidogenic and methanogenic. In the acidogenic phase, the wastewater was stabilized with NaOH (ASH) and with limestone (ASL). After that, both stabilized effluents were treated by a methanogenic reactor. Then, the effluent of the methanogenic reactor was used as fertilizer on maize in the initial growth stage (30 days), cultivated in pots in a greenhouse. The treatments were T1: control without urea addition (only N from soil); T2: NPK (2.2 g of urea with 45% of N); T3: ASH (84 mL.kg soil-1); T4: ASL (102 mL.kg soil-1); T5: double dose ASH (168 mL.kg soil-1) and T6: double dose ASL (204 mL.kg soil-1). Each treatment was composed by 4...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reuse; Manipueira; Anaerobic digestion; Hydroxide sodium; Dolomitic limestone.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100007

Morphological study of biomass during the start-up period of a fixed-bed anaerobic reactor treating domestic sewage
Provedor de dados: 52
Autores: Lima,Cláudio Antonio Andrade; Ribeiro,Rogers; Foresti,Eugenio; Zaiat,Marcelo.
This work focused on a morphological study of the microorganisms attached to polyurethane foam matrices in a horizontal-flow anaerobic immobilized biomass (HAIB) reactor treating domestic sewage. The experiments consisted of monitoring the biomass colonization process of foam matrices in terms of the amount of retained biomass and the morphological characteristics of the cells attached to the support during the start-up period. Non-fluorescent rods and cocci were found to predominate in the process of attachment to the polyurethane foam surface. From the 10th week of operation onwards, an increase was observed in the morphological diversity, mainly due to rods, cocci, and Methanosaeta-like archaeal cells. Hydrodynamic problems, such as bed clogging and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Biofilm; Domestic sewage; Fixed-bed reactor; Polyurethane foam.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000600020

Ammonia determines transcriptional profile of microorganisms in anaerobic digestion
Provedor de dados: 58
Autores: Zhang,Nan; Peng,Huijuan; Li,Yong; Yang,Wenxiu; Zou,Yuneng; Duan,Huiguo.
ABSTRACT Anaerobic digestion is important for the management of livestock manure with high ammonia level. Although ammonia effects on anaerobic digestion have been comprehensively studied, the molecular mechanism underlying ammonia inhibition still remains elusive. In this study, based on metatranscriptomic analysis, the transcriptional profile of microbial community in anaerobic digestion under low (1500 mg L-1) and high NH4 + (5000 mg L-1) concentrations, respectively, were revealed. The results showed that high NH4 + concentrations significantly inhibited methane production but facilitated the accumulations of volatile fatty acids. The expression of methanogenic pathway was significantly inhibited by high NH4 + concentration but most of the other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Ammonia; Pathway; Gene expression; Methanogenesis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400770

Performance of an Anaerobic Baffled Reactor (ABR) in treatment of cassava wastewater
Provedor de dados: 58
Autores: Ferraz,Fernanda M.; Bruni,Aline T.; Del Bianchi,Vanildo L.
The performance of an anaerobic baffled reactor (ABR) was evaluated in the treatment of cassava wastewater, a pollutant residue. An ABR divided in four equal volume compartments (total volume 4L) and operated at 35°C was used in cassava wastewater treatment. Feed tank chemical oxygen demand (COD) was varied from 2000 to 7000 mg L-1 and it was evaluated the most appropriated hydraulic retention time (HRT) for the best performance on COD removal. The ABR was evaluated by analysis of COD (colorimetric method), pH, turbidity, total and volatile solids, alkalinity and acidity. Principal component analysis (PCA) was carried to better understand data obtained. The system showed buffering ability as acidity decreased along compartments while alkalinity and pH...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic baffled reactor (ABR); Anaerobic digestion; Cassava wastewater; COD removal; Principal component analysis (PCA).
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000100007

A comparative cost analysis for using compost derived from anaerobic digestion as a peat substitute in a commercial plant nursery
Provedor de dados: 118
Autores: Restrepo,Adriana P; García García,José; Moral,Raúl; Vidal,Fernando; Pérez-Murcia,María D; Bustamante,María Á; Paredes,Concepción.
A.P. Restrepo, J. Garcia-Garcia, R. Moral, F. Vidal, M.D. Pérez-Murcia, M.A. Bustamante, and C. Paredes. 2013. A comparative cost analysis for using compost derived from anaerobic digestion as a peat substitute in a commercial plant nursery. Cien. Inv. Agr. 40(2): 253-264. The aim of this study was to evaluate the economic feasibility of using compost made from anaerobically digested cattle slurries in a commercial nursery. Using a comparative cost analysis, commercial peat substrate growing media has been partially substituted with increasing proportions of compost (25, 50 and 75% v/v of compost). This experiment was intended to establish the conditions under which the use of these composts is feasible and competitive relative to commercial peat, at both...
Tipo: Journal article
Palavras-chave: Anaerobic digestion; Costs; Economics; Growing media; Peat; Seedling production.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200002