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The effect of a secondary chlorophenol presence on the removal of 2,4-dichlorophenol (2,4-DCP) in an activated sludge system bioaugmented with 2,4-DCP degrading special culture

Paper ID Volume ID Publish Year Pages File Format Full-Text
36501 45134 2005 6 PDF Available
Title
The effect of a secondary chlorophenol presence on the removal of 2,4-dichlorophenol (2,4-DCP) in an activated sludge system bioaugmented with 2,4-DCP degrading special culture
Abstract

Bioaugmentation is often used to improve the removal of some recalcitrant pollutants in the contaminated water or soils. In this study, 2,4-dichlorophenol (2,4-DCP) degrading special microorganisms, which was cultured in our lab, was augmented in an activated sludge (AS) system to enhance the degradation of 2,4-DCP. The effect of a secondary chlorophenol, 4-monochlorophenol (4-MCP), which was present with 2,4-DCP, on the removal of 2,4-DCP in the bioaugmented system was investigated through batch and fed-batch tests. Results showed that the first addition of 4-MCP in feed inhibited the degradation of 2,4-DCP, and the inhibition increased with the increase of 4-MCP initial concentration. However, for the second and third fed-batch run, the system receiving the mixed components of 4-MCP and 2,4-DCP demonstrated higher 2,4-DCP removal rate than the system receiving 2,4-DCP alone. In the system with mixed components, 2,4-DCP was always degraded first, and when it nearly reached complete removal, 4-MCP degradation began. A double-stage degradation pattern was observed.

Keywords
Bioaugmentation; 4-Monochlorophenol; 2,4-Dichlorophenol; Degradation; Special culture
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The effect of a secondary chlorophenol presence on the removal of 2,4-dichlorophenol (2,4-DCP) in an activated sludge system bioaugmented with 2,4-DCP degrading special culture
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 11, November 2005, Pages 3462–3467
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
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us