TITLE

Nitrogen removal by submerged membrane separation activated sludge process

AUTHOR(S)
Nagaoka, H.
PUB. DATE
June 1999
SOURCE
Water Science & Technology;1999, Vol. 39 Issue 8, p107
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
The performance of the submerged membrane separation activated sludge (SMAS) process with intermittent aeration was investigated in a laboratory scale experiment. By intermittent aeration (30 minutes cycle), nitrogen was removed successfully (95% removal rate) from influent containing NH4-N and acetic acid. A mathematical model wasdeveloped to simulate the performance of the SMAS considering the behavior of extracellular polymers (production, degradation, accumulation on the membrane and consolidation) and the experimental result wassuccessfully simulated by the model. Degradation of EPS was accelerated by intermittent operation, which suggests that the combination ofbiological denitrification with the membrane separation process is advantageous in the prevention of membrane fouling in the BOD-removal-type membrane process.
ACCESSION #
8405861

 

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