침지식 MBR을 이용한 유입수의 COD fraction에 따른 막오염 특성 연구 (A Study on Membrane Fouling by COD fraction of Influent in Submerged MBR)

서지정보

· 발행기관 : 대한상하수도학회
· 수록지 정보 : 상하수도학회지 / 25권 / 5호 / 681 ~ 689페이지
· 저자명 : 이상정, 주재영, 배윤선, 정인호, 이해군, 정창화, 박철휘

초록

Submerged membrane bio-reactor (SMBR) has several advantages such as high MLSS, long SRT, and low F/M ratio at wastewater treatment. So, this has widely applied over the world and many studies have been conducted. However, membrane fouling remains an inevitable problem. This study was investigated using bench-scale SMBR with three poeration modes. Raw waters were prepared by addition of starch, acetic and fibric acid to recovery water of zeolite. The efficiency of nitrification and COD were very stable as about 95% and 80%, respectively. And critical flux was 128.8L/m2/hr. The result of biodegradability test was following values at the each mode : Ss+Xs/C_T=81.7%, 35.1% and 45.3%, X_I+S_I/C_T=18.3%, 64.9% and 54.7%. When particulate matters such as XI and XS in influent are increased, membrane fouling will take place more and more. A relative ratio of filtration resistance to the fouling occurred by the cake layer was increased when increased the portion of XI and polysaccharide. It was thought that the formation of cake layer was promoted due to bond between XI and vicid material s generated from the polysaccharide.

영어초록

Submerged membrane bio-reactor (SMBR) has several advantages such as high MLSS, long SRT, and low F/M ratio at wastewater treatment. So, this has widely applied over the world and many studies have been conducted. However, membrane fouling remains an inevitable problem. This study was investigated using bench-scale SMBR with three poeration modes. Raw waters were prepared by addition of starch, acetic and fibric acid to recovery water of zeolite. The efficiency of nitrification and COD were very stable as about 95% and 80%, respectively. And critical flux was 128.8L/m2/hr. The result of biodegradability test was following values at the each mode : Ss+Xs/C_T=81.7%, 35.1% and 45.3%, X_I+S_I/C_T=18.3%, 64.9% and 54.7%. When particulate matters such as XI and XS in influent are increased, membrane fouling will take place more and more. A relative ratio of filtration resistance to the fouling occurred by the cake layer was increased when increased the portion of XI and polysaccharide. It was thought that the formation of cake layer was promoted due to bond between XI and vicid material s generated from the polysaccharide.

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