Record Details

Removal of chlorophenols in sequential anaerobic-aerobic reactors

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Removal of chlorophenols in sequential anaerobic-aerobic reactors
 
Creator MAJUMDER, PS
GUPTA, SK
 
Subject sludge blanket reactors
waste-water
biological treatment
priority pollutants
phenolic-compounds
biodegradation
2,4-dichlorophenol
pulp
biotransformation
decolorization
2-chlorophenol (2-cp)
2,4-dichlorophenol (2,4-dcp)
upflow anaerobic sludge blanket (uasb)
rotating biological contactor (rbc)
 
Description Combination of upflow anaerobic sludge blanket (UASB) and aerobic rotating biological contactor (RBC) reactors having higher biomass concentration and higher sludge retention time (SRT) was applied for the sequential treatment of priority pollutant chlorophenol containing wastewater. Target compounds 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP) present in two simulated waste-waters at a concentration of 30 mg/l each individually were sequentially treated in continuous mode by combined UASB-I, RBC-I and combined UASB-II, RBC-II reactors, respectively after the acclimation of their biomass with the corresponding chlorophenol. Reactor combinations took 190 and 215 days for acclimation with 30 mg/l of 2-CP and 2,4-DCP respectively. Hydraulic retention time (HRT) studies showed that 12 h HRT of UASB-I and 23 h HRT of RBC-I as well as 12 h HRT of UASB-II and 28.8 h HRT of RBC-II were the optimum combinations for the treatment of simulated wastewater containing 2-CP and 2,4-DCP respectively. Optimum HRT combinations produced 2-CP and 2,4-DCP effluent having corresponding chlorophenol concentration of below detectable limit (BDL) and 0.1 mg/l respectively. Half velocity coefficients (K,) for 2-CP and 2,4-DCP biodegradation in UASB reactors were determined to be 5.07 mg 2-CP/l and 6.49 mg 2,4-DCP/l. Optimum ratio of substrate (chlorophenol): co-substrate (sodium acetate) was 1:100. (c) 2005
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-22T12:03:58Z
2011-12-26T12:52:25Z
2011-12-27T05:37:19Z
2011-07-22T12:03:58Z
2011-12-26T12:52:25Z
2011-12-27T05:37:19Z
2007
 
Type Article
 
Identifier BIORESOURCE TECHNOLOGY, 98(1), 118-129
0960-8524
http://dx.doi.org/10.1016/j.biortech.2005.11.009
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6219
http://hdl.handle.net/10054/6219
 
Language en