PMID- 16157449
OWN - NLM
STAT- MEDLINE
DCOM- 20061204
LR  - 20191210
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 128
IP  - 2-3
DP  - 2006 Feb 6
TI  - Effect of biogenic substrate concentration on the performance of sequencing batch 
      reactor treating 4-CP and 2,4-DCP mixtures.
PG  - 258-64
AB  - Effect of a biogenic substrate (peptone) concentration on the performance of 
      sequencing batch reactor (SBR) treating 220 mg/l 4-chlorophenol (4-CP) and 110 
      mg/l 2,4-dichlorophenol (2,4-DCP) mixtures was investigated. In this context, 
      peptone concentration was gradually decreased from 300 mg/l to null in which 
      chlorophenols were fed to the reactor as sole carbon and energy sources. By this 
      way, the effect of peptone concentration on observed yield coefficient (Y), 
      biomass concentration, chlorophenols and COD removal performances were 
      investigated. Decreasing peptone concentration accompanied with lower biomass 
      concentration led to increase in peak chlorophenol and COD concentrations within 
      the reactor during each SBR cycle. This, in turn, caused noteworthy declines in 
      the removal rates as chlorophenol degradations followed Haldane substrate 
      inhibition model. Also, increased peak chlorophenol concentrations led to the 
      accumulation of 5-chloro-2-hydroxymuconic semialdehyde (CHMS), which is -meta 
      cleavage product of 4-CP. Despite the decreased removal rates, complete 
      chlorophenols and CHMS degradation, in addition to high COD removal efficiencies 
      (>90%), were observed for all studied conditions, even chlorophenols were added 
      as sole carbon and energy sources. Another significant point is that 2,4-DCP at 
      slightly elevated concentrations (>20 mg/l) within the reactor caused a strong 
      competitive inhibition on 4-CP degradation. In SBR, feeding the influent to the 
      reactor within a certain period (i.e. filling period) provided dilution of coming 
      wastewater, which decreased the chlorophenols concentrations to which 
      microorganisms were exposed. Therefore, use of SBR may help to avoid both self 
      and competitive inhibitions in the treatment of 4-CP and 2,4-DCP mixture 
      especially in the presence high biogenic substrate concentrations. In addition, 
      isolation and identification studies have indicated that Pseudomonas sp. and 
      Pseudomonas stutzeri were dominant species in the acclimated mixed culture.
FAU - Sahinkaya, Erkan
AU  - Sahinkaya E
AD  - Middle East Technical University, Environmental Engineering Department, 06531 
      Ankara, Turkey. erkans@metu.edu.tr
FAU - Dilek, Filiz B
AU  - Dilek FB
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20050912
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Chlorophenols)
RN  - 0 (Peptones)
RN  - 0 (Water Pollutants, Chemical)
RN  - 3DLC36A01X (4-chlorophenol)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Biodegradation, Environmental
MH  - *Bioreactors
MH  - Chlorophenols/*chemistry
MH  - Kinetics
MH  - Osmolar Concentration
MH  - Peptones/*chemistry
MH  - *Water Pollutants, Chemical
MH  - Water Pollution, Chemical/*prevention & control
EDAT- 2005/09/15 09:00
MHDA- 2006/12/09 09:00
CRDT- 2005/09/15 09:00
PHST- 2005/05/05 00:00 [received]
PHST- 2005/08/02 00:00 [revised]
PHST- 2005/08/09 00:00 [accepted]
PHST- 2005/09/15 09:00 [pubmed]
PHST- 2006/12/09 09:00 [medline]
PHST- 2005/09/15 09:00 [entrez]
AID - S0304-3894(05)00456-5 [pii]
AID - 10.1016/j.jhazmat.2005.08.002 [doi]
PST - ppublish
SO  - J Hazard Mater. 2006 Feb 6;128(2-3):258-64. doi: 10.1016/j.jhazmat.2005.08.002. 
      Epub 2005 Sep 12.