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Anaerobic-anoxic-aerobic sequential degradation of synthetic wastewaters

DSpace at IIT Bombay

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Title Anaerobic-anoxic-aerobic sequential degradation of synthetic wastewaters
 
Creator CHAKRABORTY, S
VEERAMANI, H
 
Subject plant waste-water
cyanide
removal
system
inhibition
nitrogen
complex wastewater
acclimation
anaerobic detoxification
nitrification
denitrification
recycle ratio
 
Description This study was conducted in a continuous three-stage system of anaerobic (R1)-anoxic (R2)-aerobic (M) reactors with synthetic wastewater containing phenol (1000 mg/L), chemical oxygen demand (COD) (3000 mg/L), CN-(30 mg/L),SCN-(400 mg/L),and NH4+-N(600 mg/L)as principal,pollutants and well-acclimated heterogeneous microbial cultures. The final effluent was partially returned to R2 with a recycle ratio of 1. Anaerobic stage served to detoxify the feed by removing up to 80% of cyanide. Complete SCN- removal and denitrification could be achieved in the anoxic stage by utilizing phenol as an internal source of carbon. Nitrification efficiency of 93% was obtained in the aerobic reactor. The results demonstrated that the three-stage system can give the desired final treated effluent quality (0 mg/L of phenol, 0.2 mg/L of CN-, 210 mg/L of COD, and 20 mg/L of NH4+-N) and that the NO3--N concentration can be lowered by a higher recycle ratio.
 
Publisher HUMANA PRESS INC
 
Date 2011-07-31T07:28:01Z
2011-12-26T12:52:53Z
2011-12-27T05:39:50Z
2011-07-31T07:28:01Z
2011-12-26T12:52:53Z
2011-12-27T05:39:50Z
2002
 
Type Article
 
Identifier APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY, 102(), 443-451
0273-2289
http://dx.doi.org/10.1385/ABAB:102-103:1-6:443
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8029
http://hdl.handle.net/10054/8029
 
Language en