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메탄발효를 위한 도시쓰레기 초고온 가용화 방법의 효율성 검토
천지훈,Tsuno Hiroshi 대한상하수도학회 2010 상하수도학회지 Vol.24 No.5
The efficiency of biological hydrolysis at 80℃ on municipal solid waste mixed with anaerobic digestion sludge was investigated in 100L batch reactors. The hydrolysis effect was observed within a day, when the hydrolysis reactor used for a pre-treatment reactor for methanogenesis, and the effect was observed during two days, When the reactor used for post-treatment reactor. For both configurations, methane production rate decreased, when hydrolysis was carried out more than a day. Gaseous ammonia in the hydrolysis reactors was successtully removed by the ammonia stripping system. Microbial diversity analysis on the hydrolysis reactors indicated dependency of microbial diversity on the configuration of the hydrolysis reactors. Carbohydrate and lactate degrading microbes dominated in the hydrolysis reactor, when the hydrolysis reactor used for a pre-treatment reactor for methanogenesis, while protein degrading microbes dominated in the post-treatment reactor.
Taira Hidaka,Hiroshi Tsuno,Haruka Yagi,Yusuke Kosaka 한국생물공학회 2012 Biotechnology and Bioprocess Engineering Vol.17 No.2
Batch and semi-continuous thermophilic L-lactate fermentation experiments were performed using Bacillus coagulans and glucose as a substrate. Reactor performance and biomass concentrations were assessed using two methods: turbidity as a traditional biomass index and realtime polymerase chain reaction (PCR) quantification of 16S rRNA genes. In the batch experiment, although the relationship between turbidity and real-time PCR assay differed depending on the growth phase, a correlation was observed between both assay methods. In the semicontinuous experiment, real-time PCR measurement was well suited for use as an index for evaluating bacterial mass under different organic loading conditions. A mathematical model was applied to evaluate the real-time PCR quantification to long-term, semi-continuous lactate fermentation. Lactate fermentation was well suited since only B. coagulans was involved in the reactions. The results obtained revealed a fundamental relationship between real-time PCR and traditional biomass analyses. Batch and semi-continuous thermophilic L-lactate fermentation experiments were performed using Bacillus coagulans and glucose as a substrate. Reactor performance and biomass concentrations were assessed using two methods: turbidity as a traditional biomass index and realtime polymerase chain reaction (PCR) quantification of 16S rRNA genes. In the batch experiment, although the relationship between turbidity and real-time PCR assay differed depending on the growth phase, a correlation was observed between both assay methods. In the semicontinuous experiment, real-time PCR measurement was well suited for use as an index for evaluating bacterial mass under different organic loading conditions. A mathematical model was applied to evaluate the real-time PCR quantification to long-term, semi-continuous lactate fermentation. Lactate fermentation was well suited since only B. coagulans was involved in the reactions. The results obtained revealed a fundamental relationship between real-time PCR and traditional biomass analyses.