지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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The effects of chemical pretreatments on the excess sludge production in the membrane-coupled bioreactor were investigated. In addition, their effects on membrane fouling were also evaluated. Two membrane bioreactors were operated. In one reactor, a part of the mixed liquor was t reated with NaOH and ozone gas consecutively and was returned to the reactor. T he f lowrate of the chemical pretreatment stream was 1.5% of the influent flowrate. During the 200days of operation, the MLSS level in the bioreactor with mixed liquor pretreatment was maintained relatively constant at the range of 8,000 ~ 10,000$mg/{\ell}$ while it increased steadily up to 26,000 $mg/{\ell}$ in the absence of the pretreatment. Each reactor was equipped with two laboratory membrane modules where the flux for each module was 20, and 30 ${\ell}/m^2{\cdot}h$, respectively. With pretreatment, almost constant transmembrane pressure(TMP) was observed throughout the operation at the flux of 20 ${\ell}/m^2{\cdot}h$. Without pretreatment the membrane module at the same flux could also be operated at relatively stable condition. However, as the MLSS increases up to 25,000 $mg/{\ell}$, a fast TMP increase was observed. In conclusion, a complete control of excess sludge production in the membrane-coupled bioreactor was possible without significant deterioration of the treated water quality. In addition, it was shown that stable operation in terms of TMP is possible with sludge pretreatment and recirculation.
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참고문헌 (11)
참고문헌 신청
H. Yasui / 1996 / A full scale operation of a novel activated sludge process without excess sludge production / Wat. Sci. Tech 34(3):395~404
Hsiau P. C / 2001 / Characteristics of four alkaline biosolids produced from sewage sludge / Conferece of Sludge Management :119~124
Jih-Gaw Lin / 1998 / Alkaline Hydrolysis of the Sludge Generated from a High-strengtb, Nitrogeous-Wastwater Biological Treatment Process / Bioresource Technology 65:35~42
Kamiya T / 1998 / New combined system of biological process and intermittent ozonation for advanced wastewater treatment / Wat. Sci. Tech 39(8):145~153
Kwon, J. H. / 2001 / Enhancement of Sludge Dewaterbility by Ozone Treatment / Proceeding of the IWA Specialist Conference of Sludge Management :119~124
Hsiau P. C / 2001 / Characteristics of four alkaline biosolids produced from sewage sludge / Conferece of Sludge Management :119~124
Jih-Gaw Lin / 1998 / Alkaline Hydrolysis of the Sludge Generated from a High-strengtb, Nitrogeous-Wastwater Biological Treatment Process / Bioresource Technology 65:35~42
Kamiya T / 1998 / New combined system of biological process and intermittent ozonation for advanced wastewater treatment / Wat. Sci. Tech 39(8):145~153
Kwon, J. H. / 2001 / Enhancement of Sludge Dewaterbility by Ozone Treatment / Proceeding of the IWA Specialist Conference of Sludge Management :119~124
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