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Advanced treatment of textile wastewater towards reuse using a membrane bioreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
36195 45124 2006 7 PDF Available
Title
Advanced treatment of textile wastewater towards reuse using a membrane bioreactor
Abstract

The aim of this work was to quantify the performance of a membrane bioreactor (MBR) for the treatment of textile wastewater, and to investigate its capability to achieve a water quality meeting reuse criteria. A laboratory-scale MBR unit was fed with textile wastewater originating from a polyester finishing mill. Removal capacity was examined at VLRs ranging between 0.35 and 3.6 g/(l day). In addition, the effect of nutrient addition was studied. COD removal was found to vary between 60 and 95% with reduced COD levels at lower VLRs tested. Nutrient addition slightly enhanced effluent quality. Sludge yield obtained were between 0.01 and 0.1 gMLSS/gCODremoved. At similar sludge loading rates specific sludge production rates were approximately 50% higher when nutrients were added. A distinct relationship between sludge growth and colour removal could be observed. Above an sludge growth rate of 0.3 g/(l day), colour removal was above 87% for all wavelengths examined. If reuse of MBR treated wastewater is intended, additional polishing steps must be considered as MBR effluents did not reach the required quality for water reuse. In order to upgrade MBR effluent, nanofiltration as a post-treatment was suggested.

Keywords
Textile wastewater; Biological treatment; Membrane bioreactor (MBR); Colour removal; Water re-use; Nanofiltration
First Page Preview
Advanced treatment of textile wastewater towards reuse using a membrane bioreactor
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 8, August 2006, Pages 1751–1757
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering