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Optimization of biological treatment of paper mill effluent in a sequencing batch reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
4683 238 2007 7 PDF Available
Title
Optimization of biological treatment of paper mill effluent in a sequencing batch reactor
Abstract

Laboratory scale research on the effects of operating parameters, including mixed liquor suspended solid (MLSS) concentration, volumetric exchange rate (VER), aeration time, temperature and daily operation cycle on biological treatment of the pulp and paper mill effluent was studied using four 4 l sequencing batch reactors (SBR). The results revealed that chemical oxygen demand (COD) removal efficiency was up to 93.1 ± 0.3% and the volumetric loading reached 1.9 kg BOD m−3 day−1 under optimal operating conditions. The treatment performance of organic removal by the SBR system remained stable during the operation. The effluent quality was satisfied with the discharge standard set by the local authority and the filamentous bulking problem was solved. At the same time, the sludge settleability, in terms of sludge volume index (SVI), was improved to the healthy level (SVI = 52.7 ± 1.3 ml g−1).

Keywords
Sequencing batch reactor; Activated sludge; Paper mill wastewater; Wastewater treatment; Optimization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 34, Issue 3, June 2007, Pages 193–199
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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