JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Online ISSN : 1881-1299
Print ISSN : 0021-9592
Environment
Excess Sludge Production and the Stable Operational Condition of a Submerged Membrane Activated Sludge Process
Chandika Prasad BhattaKenji KawasakiAkira MatsudaYoshiaki MaehanaMami YamaguchiDaisuke Omori
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2006 Volume 39 Issue 2 Pages 237-240

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Abstract

Laboratory scale submerged membrane activated sludge process (SMASP) units were operated at various sludge retention times (SRTs) (9.6–498 d) and BOD loadings (0.25–1.3 kg/(m3·d)). Under these conditions, the quantity of excess sludge production and the process stability was studied, using synthetic wastewater. The stabilized MLSS was increased with an increase of SRT and BOD loading. The excess sludge production was decreased with an increase of SRT and decrease of BOD loading. The excess sludge production in SMASP at long SRT and low BOD loading was significantly smaller than the conventional activated sludge process. Various test conditions proved that the long SRT and low BOD loading were suitable operational conditions for long stable operation of SMASP.

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© 2006 The Society of Chemical Engineers, Japan
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