PMID- 16406608
OWN - NLM
STAT- MEDLINE
DCOM- 20070131
LR  - 20121115
IS  - 0960-8524 (Print)
IS  - 0960-8524 (Linking)
VI  - 98
IP  - 1
DP  - 2007 Jan
TI  - Removal of chlorophenols in sequential anaerobic-aerobic reactors.
PG  - 118-29
AB  - 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 
      wastewaters 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 12h HRT of UASB-I and 23 h HRT of RBC-I as well as 
      12h HRT of UASB-II and 28.8h 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 (Ks) 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.
FAU - Majumder, Partha Sarathi
AU  - Majumder PS
AD  - Centre for Environmental Science and Engineering, Indian Institute of Technology, 
      Powai, Mumbai 400 076, India.
FAU - Gupta, S K
AU  - Gupta SK
LA  - eng
PT  - Journal Article
DEP - 20060106
PL  - England
TA  - Bioresour Technol
JT  - Bioresource technology
JID - 9889523
RN  - 0 (Chlorophenols)
RN  - K9KAV4K6BN (2-chlorophenol)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Aerobiosis
MH  - Anaerobiosis
MH  - Biofilms
MH  - *Bioreactors
MH  - Chlorophenols/*chemistry
MH  - Time Factors
MH  - Waste Disposal, Fluid/methods
EDAT- 2006/01/13 09:00
MHDA- 2007/02/01 09:00
CRDT- 2006/01/13 09:00
PHST- 2005/06/09 00:00 [received]
PHST- 2005/11/10 00:00 [revised]
PHST- 2005/11/12 00:00 [accepted]
PHST- 2006/01/13 09:00 [pubmed]
PHST- 2007/02/01 09:00 [medline]
PHST- 2006/01/13 09:00 [entrez]
AID - S0960-8524(05)00535-3 [pii]
AID - 10.1016/j.biortech.2005.11.009 [doi]
PST - ppublish
SO  - Bioresour Technol. 2007 Jan;98(1):118-29. doi: 10.1016/j.biortech.2005.11.009. 
      Epub 2006 Jan 6.