Membrane sequencing batch reactor system for the treatment of dairy industry wastewater

A membrane separation process was coupled to a sequencing batch reactor (SBR) for biological nutrient removal (BNR) processes and a combined system was named a membrane sequencing batch reactor (MSBR). MSBR was used for the treatment of dairy industry wastewater and optimized to increase the treatme...

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Bibliographic Details
Published in:Process biochemistry (1991) 2003-10, Vol.39 (2), p.221-231
Main Authors: Bae, Tae-Hyun, Han, Sung-Soo, Tak, Tae-Moon
Format: Article
Language:English
Subjects:
Dairy industry wastewater
Membrane bioreactor
Membrane separation
Membrane sequencing batch reactor
Sequencing batch reactor
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Summary:A membrane separation process was coupled to a sequencing batch reactor (SBR) for biological nutrient removal (BNR) processes and a combined system was named a membrane sequencing batch reactor (MSBR). MSBR was used for the treatment of dairy industry wastewater and optimized to increase the treatment efficiency. Since a diffuser-attached module design, subcritical flux operation, and intermittent suction method were adapted to the system, long-term operation was possible, i.e. the system could be operated for more than 110 days with only one membrane washing. BOD removal was high (97–98%) and stable. SS (suspended solid)-free effluent was obtained by membrane separation. Since nitrogen was mainly consumed as nutrient for synthesis of new cells due to the low influent concentration, the removal rate reached 96%. Phosphorus removal was relatively low because of the limit of the biological process, i.e. removal efficiency ultimately depends on the amount of excess sludge wasting. A removal rate of 80% was reached after system optimization.
ISSN:1359-5113
1873-3298
DOI:10.1016/S0032-9592(03)00063-3