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PROMOTING START UP OF UASB REACTORS BY ADDING OF WATER ABSORBING POLYMER
今井岡,FUKAGAWA, Masayuki,LIU, Jun,UKITA, Masao,SEKINE, Masahiko,NAKANISHI, Hiroshi 嶺南大學校 環境問題硏究所 1997 環境硏究 Vol.17 No.1
ABSTRACTWe have developed a new approach to enhance granulation by adding water absorbing polymer (WAP) particles into the inoculated digested sludge. In this study, the effect of adding WAP on formation of anaerobic granular sludge was evaluated in lab-scale UASB reactors using two typical synthetic wastewater, i.e. glucose of volatile fatty acid (VFA) mixture solution. In addition, side by side with the lab-scale experiment, a pilot-scale experiment using the VFA mixture was carried out to evaluate the availability of accelerated start-up by adding WAP. The development of granular sludge was significantly enhanced by adding WAP. Granules developed on glucose and VFAs had high methanogenic activities and good settleability. From results of lab-scale experiment, the recommended dosage of WAP was about 750 mg/l of reactor volume. The results, pilot-scale experiment, indicated the availability of accelerated start-up adding WAP.
부영양화된 뢰호내해의 수질관리를 위한 수ㆍ저질예측모델의 적용
이인철,장선덕,김종규,Lee In Cheol,Chang Sun-duck,Kim Jong Kyu,Ukita Masao 한국해양환경·에너지학회 1998 한국해양환경·에너지학회지 Vol.1 No.2
대표적인 부영양화 해역인 일본의 뢰호내해를 대상으로 하여 해수ㆍ저질문의 욕존 산소와 영양염의 수수과정을 표현할 수ㆍ저질예측모델을 개발하여, 해역의 유입부하량과 수질의 응답특성, 부하량삭감의 영향해석 및 유입부하량과 수산자원의 관계 해석을 통하여 부영양화 해역의 수질관리방안에 대하여 연구하였다. 부하에 대응한 수질의 장기예측결과, 부하량과 수질의 응답특성이 해역에 따라 다르게 나타난다. 적상부하량의 간역추산방법으로서 인접해역의 부하영향 및 기여율을 포함한 부하삭감후의 수질예측에 대한 개산식을 제안하였다. 부하량 삭감효과의 수직계산결과 인(P) 뿐만 아니라 질소(N)의 부하삭감의 영향이 크게 기여함을 보였다. 유입부하량과 수산자원의 관계를 수질을 매개로 검토한 바, 뢰호내해와 같은 부영양화 해역에서는 유입부하량의 증가는 1차생산량의 증가에 반영되지만 2차생산 이후의 전송효율에도 한도가 있는 것으로 나타났다. The management of water quality and fishery resources with a major environmental problem in eutrophic coastal sea is studied. The numerical experiments using the water-sediment quality model (WSQM) were carried out for the management of water quality at the Seto Inland Sea in Japan. The results of long-term water quality simulation showed responses of seawater quality to input loads to vary in different localities. A formula roughly forecasting water qualify to estimate the effect of loading abatement was proposed. The simulation for the improvement of seawater quality showed the abatements of nutrient loads such as total phosphorus (TP) and total nitrogen (TN) as well as organic loads such as chemical oxygen demand (COD) to be peformed in the eastern Seto Inland Sea from Bisan Seto to Osaka Bay. On the other hand, it is indicated that the increase of loading leads to the increase of primary production. while not straightly to the increase of fish production for the catch of fisheries.