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| Registros recuperados: 36 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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... |
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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 |
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| Registros recuperados: 36 | |
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