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안규홍,최승휘,신항식 한국물환경학회 1987 한국물환경학회지 Vol.3 No.1
내부 원통의 회전에 의해 유속의 조절이 가능한 실험실 규모의 반응조에 glucose를 인공폐수로 사용하여 다음과 같은 결론을 얻었다. 1) 본 실험의 조건상 기질의 제거속도는 기질에 대한 1차 반응으로 보아도 무방하였다. 2) 미생물막의 두께나 유효두께가 대단히 두꺼워지더라도 100㎛이내의 깊이에서 기질의 대부분이 제거된다. 3) 외부 물질전달계수는 내부 원통의 회전속도의 1.38승에 비례하였다. To adequately describe biofilm system, mass transfer resistances must be included. Especially the external mass transfer resistance, existing between bulk liquid and biofilm surface, was very important for design and operation of reactor. But the research of it was scarcity. In this paper, the external mass transfer coefficient which has research to reaction and mass transfer within biofilm was estimated. The following conclusions were made in this study. 1. It is acceptable to regard the substrate removal rate as first order reaction of substrate in this experimental condition. 2. Substrate was mostly removed within 100 um depth, although the effective depth became large enough. 3. The external mass transfer coefficient was proportional to 1.38 power of rotational speed of inner cylinder.
자외선/과산화수소 고도산화공정에 의한 하수 2차 처리수 중의 용존유기물 분해에 미치는 부유물질과 과산화수소 농도의 영향
안규홍,이석헌,안석,김기팔,정민우,맹승규 대한상하수도학회 2002 상하수도학회지 Vol.16 No.3
Secondary effluent of activated sludge process was treated by UV/H_2O_2 advanced oxidation process to investigate the effect of suspended matter and H_2O_2 concentration. With low dosage of UV radiation, the concentration of the dissolved organic compounds measured as DOC could be increased with and without hydrogen peroxide. It was suggested that the cause of DOC increase in treated samples was the decomposition of suspended microbial particles and the incomplete oxidation of dissolved organic compounds. The removal of suspended solid significantly enhanced the degradation of DOC in both UV and catalyzed UV oxidation. Color and odor of secondary effluent was effectively removed. Turbidity was decreased by oxidation and the particle size distribution was shifted to lower range. With increased H_2O_2 dosage (30∼120mg/l), the removal of DOC was enhanced. To obtain the required quality meeting the regulated level for water reuse, additional treatment for turbidity rejection was required.