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Aerobic biodegradation of p-nitrophenol by acclimated waste activated sludge in a slurry bubble column

Paper ID Volume ID Publish Year Pages File Format Full-Text
35388 45088 2011 6 PDF Available
Title
Aerobic biodegradation of p-nitrophenol by acclimated waste activated sludge in a slurry bubble column
Abstract

An aerobic biodegradation of p-nitrophenol (PNP) by acclimated waste activated sludge in a bubble column was examined at varying initial PNP concentrations (from 12.8 to 128 mg L−1), activated sludge concentrations (from 3530 to 6300 mg L−1) and aeration rates (from 0.3 to 3.0 L min−1). The time course of the biodegradation of PNP in a batch slurry bubble column could be divided into three phases, i.e., lag phase, exponential degradation phase and ultimate deceleration phase. The complete biodegradation of 128 mg L−1 of PNP with 3600 mg L−1of mixed liquor suspended solids (MLSS) and 1.5 L min−1 of aeration rate was accomplished in 150 min. The present results indicate that the acclimated waste activated sludge is very effective for PNP aerobic biodegradation. The change in dissolved oxygen concentration during the aerobic biodegradation process was also measured. It was found that the oxygen supply strongly affects the PNP aerobic biodegradation. A modified Haldane substrate inhibition kinetics taking account of the lag phase as well as the exponential degradation phase and the ultimate deceleration phase was developed to describe the entire time course of the aerobic biodegradation of PNP. The aerobic biodegradation of PNP by acclimated activated sludge in the bubble column was successfully simulated with the correlation factors of approximately 0.95.

Keywords
Aerobic biodegradation; p-Nitrophenol; Acclimated waste activated sludge; Slurry bubble column; Substrate inhibition kinetics
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 46, Issue 1, January 2011, Pages 284–289
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