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Effect of influent pH and alkalinity on the removal of chlorophenols in sequential anaerobic-aerobic reactors

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Title Effect of influent pH and alkalinity on the removal of chlorophenols in sequential anaerobic-aerobic reactors
 
Creator MAJUMDER, PS
GUPTA, SK
 
Subject uasb reactor
reductive dechlorination
decolorization
performance
bicarbonate
bioreactor
digestion
dye
2-chlorophenol
2,4-dichlorophenol
upflow anaerobic sludge blanket
rotating biological contactor
 
Description This study was carried out to determine the effect of influent pH and alkalinity on the performance of sequential UASB and RBC reactors for the removal of 2-CP and 2.4-DCP from two different simulated wastewaters. The performance of methanogens at low (8.0) pH values and at sufficiently high alkalinity (1500-3500 mg/l as CaCO(3)) is described in this paper. Sequential reactors were capable of handling wastewaters with influent pH, 5.5-8.5. However, with influent pH 7.0 +/- 0.1 UASB reactor showed best performance for 2-CP (99%) and 2,4-DCP (88%) removals. Increase in alkalinity/COD ratio in the influent (>1.1) caused gradual decrease in the chlorophenol removal in UASB reactors. The UASB reactors could not tolerate wastewater with higher alkalinity/COD ratio (2.6) and showed significant deterioration of its performance in terms of chlorophenols removal achieving only 74.7% 2-CP and 60% 2,4-DCP removals, respectively. (C) 2008
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-22T01:27:34Z
2011-12-26T12:52:14Z
2011-12-27T05:39:19Z
2011-07-22T01:27:34Z
2011-12-26T12:52:14Z
2011-12-27T05:39:19Z
2009
 
Type Article
 
Identifier BIORESOURCE TECHNOLOGY, 100(5), 1881-1883
0960-8524
http://dx.doi.org/10.1016/j.biortech.2008.10.002
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6061
http://hdl.handle.net/10054/6061
 
Language en