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송지현,정태학,장덕 ( Ji Hyeon Song,Tai Hak Chung,Duk Chang ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.2
Reaction characteristics of an anaerobic sequencing batch reactor(ASBR) process were studied using bench scale reactors maintained at 35℃. The experiments were performed with an equivalent hydraulic retention time of 10 days and the synthetic feed was mainly composed of glucose. The ASBRs were operated with a cycle period of 24 and 0.5, respectively. Volatile suspened solids in all reactors kept increased as the operation continued. However, methane fermentation efficiency was strongly affected by the MF/M ratio. Active methane production was observed for the ASBRs of long MF time, while methane fermentation was significantly inhibited by the excessive production of the volatile acids for the ASBR of short MF time. The ASBR of high specific organic loading rate(SOLR) was not able to absorb the shock and reached an operational failure. However, when COD of the feed was reduced to 10,000㎎/ℓ, little accumulation of volatile acids were observed and active methane fermentation continued in spite of relatively high SLR. It is believed that both SOLR and the organic level of the feed are major design parameters determining safe and stable operation of the ASBR. The solid-liquid separation efficiency was markedly reduced with an increasing gas production rate due to floating of volatile suspended solids.
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