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최홍복 漢陽大學校 環境科學硏究所 2003 環境科學論文集 Vol.24 No.-
유체유동에 의해서 다단 상향류식 반응기를 구성하고 r가 단은 CFSTR(Continuous -Flow Stirred-Tank Reactor) 형태이나 전체 반응기는 PFR(Plug Flow Reactor) 형태를 유지할 수 있도록 하여 고농도 난분해성 폐수(축산폐수, 산업폐수)의 분속해도와 분해된 물질의 분리효과 및 효율개선에 대한 연구를 수행하였다. 추적자 실험을 통하여 본 실험에 사용 된 반응기(Eco Reactor, ER)가 PFR 반응기에 매우 접근하고 있다는 사실을 밝혀냈다. PFR형태 반응조의 특징으로 나타나는 요소로써 NaOH 추적자 test 결과 이론적인 체류시간의 70% 범위까지 토출된 추적자의 부하량은 71% 이상으로 나타났다. 반면에 반응조의 MLSS의 농도 분포도, 유입수 유기물 농도분포도, 용존 산소전달효율은 1단에서 50±5% 2단에서 35±7% 3단에서 15±8%로 나타났다. 이와 같은 PFR 반응기의 특징과 용존산소의 효율의 증가, 교반효과 증가 등으로 유기물 제거속도는 일반 SR 포기조보다 2배이상 증가하는 것으로 나타났다. This research investigates to increase the biodegradation rate and solids separation of high concentration refractory wastewater (livestock wastewater, industrial wastewater) in the fluids fluctuation reactor, ER(Eco Reactor), which is composed of the PFR (Plug Flow Reactor) pattern in the total structure but to appear CFSTR (Continuous -Flow Stirred-Tank Reactor) in the stage unit structure. We discovered the fact that ER approached to PFR pattern through a tracer experiment. The special feature of the PFR reactor type is observed that the effluent tracer loading rate including within 70% range of theoretical retention time is over 71%. MLSS concentration distribution, influent organics and DO transfer efficiency are to appear 50±5%, 35±7%, and 15±8% in the first, second, and third stage, respectively. It is observed that the removal rate of organics increase over twice as many as a normal SBR(Sequencing Batch Reactor) because of the PFR feature, high oxygen transfer efficiency, mixture effects and so on.
최홍복,황경엽,신응배 ( Hong Bok Choi,Kyung Yub Hwang,Eung Bai Shin ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.4
The effect of sludge pretreatment on the anaerobic digestion of waste-activated sludge(WAS) was studied. In this sludge pretreatment process, bacteria in the WAS were ruptured by mechanical jet and smash under pressurized conditions. The protein concentrations in the WAS varied significantly before and after pretreatment. Protein concentration increased according to jet times and pressure. Efficiencies of volatile solids(VS) removal were 40∼45% when the pretreated WAS once under pressure of 30 bar was fed into an anaerobic digester with 4-day hydraulic retention time(input organic loading, 2. 95 ㎏ VS/㎥.d). When intact WAS was fed into the digester, WAS was not digested efficiently even with a longer hydraulic retention time(10 days). Therefore, it is recognized that higher digestion efficiencies and stabilization of the WAS were obtained through a mechanical pretreatment of WAS.