PMID- 18276060
OWN - NLM
STAT- MEDLINE
DCOM- 20090219
LR  - 20121115
IS  - 0301-4797 (Print)
IS  - 0301-4797 (Linking)
VI  - 90
IP  - 2
DP  - 2009 Feb
TI  - Biological treatment of 2,4,6-trichlorophenol (TCP) containing wastewater in a 
      hybrid bioreactor system with effluent recycle.
PG  - 692-8
LID - 10.1016/j.jenvman.2008.01.001 [doi]
AB  - Due to the toxic effects of trichlorophenol (TCP) on microorganisms, biological 
      treatment efficiencies of TCP containing wastewaters are usually low. Synthetic 
      wastewater containing 2,4,6-TCP was biologically treated in a hybrid-loop 
      bioreactor system consisting of a packed column biofilm and an aerated tank 
      bioreactor with effluent recycle in order to improve COD and TCP removals. 
      Effects of the feed TCP concentration on COD, TCP and toxicity removal 
      performance of the system were investigated for the feed TCP between 50 and 450 
      mg L(-1) while the sludge age (solids retention time, SRT) and hydraulic 
      residence time (HRT) were kept constant at 20 d and 25 h, respectively. Biomass 
      concentrations in the packed column and in the aeration tank decreased with 
      increasing feed TCP concentrations due to toxic effects of TCP on the organisms. 
      Low biomass concentrations in the system at high feed TCP contents resulted in 
      low COD, TCP and toxicity removals. Therefore, percent TCP, COD and toxicity 
      removals decreased with increasing feed TCP concentrations especially above 400 
      mg L(-1). The effluent TCP concentrations were lower than 20 mg L(-1) for the 
      feed TCP concentrations below 390 mg L(-1) resulting in TCP and COD removals 
      above 90%. Specific rates of TCP and COD removals increased with the feed TCP due 
      to low biomass concentrations at high TCP contents. The system should be operated 
      at a feed TCP lower than 400 mg L(-1) in order to obtain more than 90% TCP, COD 
      and toxicity removals under the specified experimental conditions.
FAU - Eker, Serkan
AU  - Eker S
AD  - Department of Environmental Engineering, Dokuz Eylul University, Buca, Izmir, 
      Turkey.
FAU - Kargi, Fikret
AU  - Kargi F
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080213
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Chlorophenols)
RN  - 0 (Industrial Waste)
RN  - 0 (Water Pollutants, Chemical)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
SB  - IM
MH  - Biomass
MH  - *Bioreactors
MH  - Chlorophenols/*metabolism
MH  - *Industrial Waste
MH  - Water Pollutants, Chemical/*metabolism
EDAT- 2008/02/16 09:00
MHDA- 2009/02/20 09:00
CRDT- 2008/02/16 09:00
PHST- 2007/03/06 00:00 [received]
PHST- 2007/10/18 00:00 [revised]
PHST- 2008/01/04 00:00 [accepted]
PHST- 2008/02/16 09:00 [pubmed]
PHST- 2009/02/20 09:00 [medline]
PHST- 2008/02/16 09:00 [entrez]
AID - S0301-4797(08)00005-4 [pii]
AID - 10.1016/j.jenvman.2008.01.001 [doi]
PST - ppublish
SO  - J Environ Manage. 2009 Feb;90(2):692-8. doi: 10.1016/j.jenvman.2008.01.001. Epub 
      2008 Feb 13.