Prediction of methane yield at optimum pH for anaerobic digestion of organic fraction of municipal solid waste

Cun-fang, Liu; Yuan, Xingzhong; Zeng, Guangming; Li, Wen-Wei; Li, Jing

doi:10.1016/j.biortech.2007.01.013

Cited by 240 publications

(110 citation statements)

References 16 publications

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“…Low pH value inhibits methanogenic bacteria and methanogenesis [50]. The high pH value recorded in this study during the first week could be attributed to large ammonia losses resulting from C/N ratio of poultry waste [51]. The study of the influence of pH on the production of biogas from poultry waste showed that in general the production of biogas was always present because the pH remained throughout the period of the study in a range of 6 to 7.8.…”

Section: Curve 2: Monitoring Of the Ph Measurement During The Differementioning

confidence: 72%

Experimental Anaerobic Digestion of Poultry Droppings and Microbiological and Energetic Monitoring of the Process under Study

Gharianiand¹,

Najar²

2017

IJAERS

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Section: Curve 2: Monitoring Of the Ph Measurement During The Differementioning

confidence: 72%

Experimental Anaerobic Digestion of Poultry Droppings and Microbiological and Energetic Monitoring of the Process under Study

Gharianiand¹,

Najar²

2017

IJAERS

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“…Essa fase metanogênica mais homogênea do pH pode ter influenciado a estabilidade de produção de biogás nas diferentes estações do ano desse ano. Os dados obtidos para o pH no terceiro ano correspondeu ao que os autores [13] consideram, dizendo que as bactérias e arqueas metanogênicas são mais sensíveis à variação de pH e a faixa ótima para digestão anaeróbia varia entre 6,5 a 7,6.…”

Section: Resultsunclassified

Treatment of urban residential organic waste through anaerobic digestion

Granzotto¹,

Scherer²,

Brächer³

2016

SCI. CUM IND

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ResumoA quantidade de resíduos gerados atualmente é um reflexo do aumento populacional e consumismo, muitas vezes, até desnecessários das pessoas. Os resíduos orgânicos são a maioria entre os resíduos sólidos urbanos gerados. Esses resíduos precisam ser tratados adequadamente para evitar problemas ao ambiente e a saúde das pessoas. O objetivo deste trabalho foi tratar o resíduo orgânico residencial urbano e verificar a eficiência na transformação em biogás e biofertilizante. Foi utilizado um biodigestor tipo indiano no município de Nova Palma, Rio Grande do Sul. A pesquisa ocorreu no período de três anos tendo um acompanhamento diário. A produção média de biogás foi maior no verão para os três anos e foi mais estável no terceiro ano nas diferentes estações. Não houve reagente para coliformes. O estudo apontou que a digestão anaeróbia tem potencial em tratar o resíduo orgânico. Palavras-chaveResíduo orgânico; Biodigestão; Energias renováveis. Treatment of urban residential organic waste through anaerobic digestion AbstractThe amount of waste generated nowadays is a reflection of population growth and consumerism, many times, unnecessary by people. Organic waste is the most part of the solid waste generated. This waste need to be treated adequately to avoid environmental problems and health problems in people. The objective was to treat urban residential organic waste and to verify the efficiency of the transformation into biogas and bio fertilizers. A digester of the Indian type was used in Nova Palma, Rio Grande do Sul. The research was developed in the period of three years with a daily monitoring. The average biogas production was higher in the summer for three years and it was more stable in the third year in different seasons. There were no reagents to coliforms. The study found that anaerobic digestion has potential in treating organic waste. KeywordsOrganic residue; Biodigestion; Renewable energy. I. INTRODUÇÃONos últimos anos têm aumentado a geração de resíduos sólidos urbanos (RSU) significativamente. Esse crescimento deve-se ao aumento populacional e, consequentemente, das indústrias e da produção nos mais diferentes setores. Por conta desse crescimento populacional e do consumismo temse falado muito no desenvolvimento sustentável neste século. No entanto, se as pessoas e os setores produtivos não estão conseguindo diminuir a geração dos seus resíduos é preciso buscar alternativas para tratá-los. De acordo com a, [1] foram coletados 56,56 milhões de toneladas de RSU no Brasil no ano 2012. Desses, 29,07 milhões de toneladas de resíduos coletados 51,4 % era de material orgânico. Nesta fonte foi citado que a maioria dos municípios brasileiros geram 50 % de fração orgânica do total dos RSU e, alguns casos chegam a 60 %. Para [2], os RSU, em geral, são compostos de matéria orgânica degradável (restos de alimentos, papéis e outros), material orgânico não degradável (plásticos) e material inorgânico (vidro, metal e outro). Percebe-se, com isso, uma grande heterogeneidade de resíduos gerados nas cidades. Neste ...

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“…More acidic condition occurred in the reactor with the higher concentration variant, whereas, the reactor with the middle concentration variant showed quite normal pH value. Liu et al (2008) have specified that methanogens (microorganisms that produce methane) are suitable with the pH values in the range of 6.5-7.5, while the minimum pH value of 6.2 has been identified by Eckenfelder et al (1988). However, the lower limit of pH value of 4 has been identified by Gerardi (2006), stating that an acidic pH can be tolerated by the microorganisms as long as the pH value is not lower than 4.…”

Section: Resultsmentioning

confidence: 99%

Factors Affecting BOD5 and TSS Removal from Wastewater Using UASB Reactor

Syafrudin¹,

Sudarno²,

Rizqianti³

et al. 2015

J. of Environmental Science and Technology

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The purpose of this study is to investigate the efficiency of the UASB reactors (Upflow Anaerobic Sludge Blanket) at the laboratory scale in processing the mixture of domestic wastewater (greywater and black water). Two parameters of influent concentration and the upflow velocity were changed for the evaluation. Low, medium and high influent concentrations were used and the parameters examined were Biological Oxygen Demand (BOD 5 ) and Total Suspended Solid (TSS). Results showed 76% as the maximum BOD 5 removal efficiency and the maximum TSS removal efficiency was 72%. The BOD 5 and TSS concentrations available to be removed by the microorganisms increased with the increasing wastewater concentration. Generally, slower upflow velocity allowed more time for the biomass to achieve substrate decomposition in the wastewater, therefore higher removal efficiency was observed with slower upflow velocity. Nevertheless, further processing of the treated wastewater is recommended as the treatment using the UASB reactor did not meet the quality standards specified by the Ministerial Environmental Decree of Indonesia.

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Prediction of methane yield at optimum pH for anaerobic digestion of organic fraction of municipal solid waste

Cited by 240 publications

References 16 publications

Experimental Anaerobic Digestion of Poultry Droppings and Microbiological and Energetic Monitoring of the Process under Study

Experimental Anaerobic Digestion of Poultry Droppings and Microbiological and Energetic Monitoring of the Process under Study

Treatment of urban residential organic waste through anaerobic digestion

Factors Affecting BOD5 and TSS Removal from Wastewater Using UASB Reactor

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