수산물 위판장 폐기물의 처리용 소화조의 Start-up에 있어서 반응조 형상 및 슬러지층 유동화가 미치는 영향 = Effect of Reactor Configuration and Sludge Bed Fluidization on Start-up Stage of Anaerobic Digester for Treatment of Wastes from Fisheries Consignment Market

다국어 초록 (Multilingual Abstract)

Effect of organic loading rate on digester performance is evaluated under the conditions of same surface are/reactor volume ratio and different reactor diameter.
At the low loading rate of 0.4kg COD/㎥·d, high rate of organic removal could be obtained regardless of reactor diameter. It can be estimated that reactor configuration can not affect reactor performance at the low lpading rate. However, different performance depending on reactor diameter is observed at the organic loading rate of 6kg COD/㎥·d. That is, volatile acid accumulation and low COD removal efficiency is observed in reacor having 6.4cm diameter, while volatile acid is not accumulated at all and high COD removal efficiency is observed in reactor having 3cm diameter. Such a differenfe of reactor performance depending on reactor diameter can be explained that sludge bed can be fluidized by evolved gas bubble in narrow reactor, while sludge bed can not be fluidized by evolved gas bubble only in wide reactor.
At a high organic loading rate of 20kg COD/㎥·d, It can be judged that there is no relation between reactor configuration and reactor performance because all reactors showed very low COD removal efficiencies regardless of reactor diameter.
Sludge bed fluidization is one of the most imjprotant factors in achieving efficient start-up of anaerobic digester. Narrow and tall type reactor is favorable condition for making sludge bed fluidization at a constant surface area/reactor volume ratio.Thus, it can be judged that reactor configuration and sludge bed fluidization have great influence to reactor performance.