PMID- 19577792
OWN - NLM
STAT- MEDLINE
DCOM- 20091022
LR  - 20131121
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 76
IP  - 9
DP  - 2009 Aug
TI  - Comparison of UASB and EGSB performance on the anaerobic biodegradation of 
      2,4-dichlorophenol.
PG  - 1192-8
LID - 10.1016/j.chemosphere.2009.06.015 [doi]
AB  - The anaerobic degradation of 2,4-dichlorophenol (2,4-DCP) in upflow anaerobic 
      sludge blanket (UASB) and expanded granular sludge bed (EGSB) reactors using 
      glucose as main carbon source was studied. The performance of both systems was 
      compared in terms of 2,4-DCP and COD removal efficiencies, methane production, 
      stability, granular sludge adaptability as well as reversion of the bacterial 
      inhibition. Both organic and 2,4-DCP loading rates were incrementally varied 
      through the experiments. With loading rates of 1.9 gCODL(-1)d(-1) and 100mg 
      2,4-DCP L(-1)d(-1), 75% and 84% removal efficiencies of this compound, 
      accompanied by COD consumption efficiencies of 61% and 80% were achieved in the 
      UASB and EGSB reactors, respectively. In these conditions, methane production 
      reached 0.088 L CH(4)g(-1) COD in the EGSB reactor whereas in the UASB reactor 
      was almost negligible. Decreasing the 2,4-DCP loading rate to 30 mgL(-1)d(-1) an 
      improvement in the methane production was observed in both reactors (methanogenic 
      activity of 0.148 and 0.192 L CH(4)g(-1) COD in UASB and EGSB reactors, 
      respectively). Efficiency of dechlorination was improved in both reactors from 
      around 30% to 80% by reducing to one-half the COD due to a decreasing of the 
      4-chlorophenol concentration accumulated in the effluents of both reactors. The 
      dechlorination efficiency of the UASB reactor was dramatically inhibited at a 
      2,4-DCP feed concentration above around 210 mgL(-1) because of 2,4-DCP 
      accumulation in the effluent. SEM studies revealed no significant morphological 
      changes in the sludge granules.
FAU - Puyol, D
AU  - Puyol D
AD  - Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, 28049 
      Madrid, Spain. danielpuyol@hotmail.com
FAU - Mohedano, A F
AU  - Mohedano AF
FAU - Sanz, J L
AU  - Sanz JL
FAU - Rodriguez, J J
AU  - Rodriguez JJ
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20090704
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Chlorophenols)
RN  - 0 (Sewage)
RN  - OP0UW79H66 (Methane)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Anaerobiosis
MH  - Biodegradation, Environmental
MH  - Chlorophenols/*metabolism
MH  - Methane/metabolism
MH  - Sewage/*microbiology
MH  - Waste Disposal, Fluid
EDAT- 2009/07/07 09:00
MHDA- 2009/10/23 06:00
CRDT- 2009/07/07 09:00
PHST- 2009/03/05 00:00 [received]
PHST- 2009/06/03 00:00 [revised]
PHST- 2009/06/04 00:00 [accepted]
PHST- 2009/07/07 09:00 [entrez]
PHST- 2009/07/07 09:00 [pubmed]
PHST- 2009/10/23 06:00 [medline]
AID - S0045-6535(09)00707-3 [pii]
AID - 10.1016/j.chemosphere.2009.06.015 [doi]
PST - ppublish
SO  - Chemosphere. 2009 Aug;76(9):1192-8. doi: 10.1016/j.chemosphere.2009.06.015. Epub 
      2009 Jul 4.