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Anaerobic treatment of highly concentrated aniline wastewater using packed-bed biofilm reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
35906 45113 2007 5 PDF Available
Title
Anaerobic treatment of highly concentrated aniline wastewater using packed-bed biofilm reactor
Abstract

The performance of packed-bed biofilm reactor (PBBR) with self-floating bio-carriers was investigated to treat highly concentrated organic nitrogenous aniline wastewater with a COD value as high as 24,000 mg/L. With 45 vol% of carrier charge inside the reactor, the aniline wastewater can be effectively treated with 94% of COD removal efficiency at a low organic loading rate (OLR) of 0.9 kg COD/(m3 d). The removal efficiency decreased gradually down to 75% when OLR increased to 12.27 kg COD/(m3 d) that corresponded to 1 day of HRT. Separate tests with biofilm alone showed that the conversion contribution of the biofilm was about half of the overall COD conversion by the biofilm plus sludge system at the same OLRs of 3–4 kg COD/(m3 d), and that the biofilm had higher activity than suspended sludge. Ammonium released from decomposed aniline was increased gradually from 500 to 1700 mg/L with the OLR increase from 0.9 to 12.27 kg COD/(m3 d), which resulted in inhibitory effect to the microorganism due to the toxicity of free ammonia. Batch anaerobic toxicity tests showed that the biofilm was less sensitive to toxic compounds than suspended sludge and could tolerate higher concentration of free ammonia.

Keywords
Packed-bed biofilm reactor; Aniline wastewater; Bio-carrier; Inhibitory effect; Free ammonia
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Anaerobic treatment of highly concentrated aniline wastewater using packed-bed biofilm reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 12, December 2007, Pages 1666–1670
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