PMID- 12688587
OWN - NLM
STAT- MEDLINE
DCOM- 20031021
LR  - 20191107
IS  - 0923-9820 (Print)
IS  - 0923-9820 (Linking)
VI  - 13
IP  - 5
DP  - 2002
TI  - Effects of alternative carbon sources on biological transformation of 
      nitrophenols.
PG  - 353-60
AB  - The removal of nitrophenols under denitrifying conditions was studied in 
      bench-scale upflow anaerobic sludge blanket (UASB) reactors (R1, R2, R3 and R4) 
      using three different carbon sources. Initially acetate was used as carbon source 
      (substrate) in all the four reactors followed by glucose and methanol. Reactor R1 
      was kept as control and R2, R3, R4 were fed with 30 mg/l concentration of 
      2-nitrophenol (2-NP), 4-nitrophenol (4-NP), and 2,4-dinitrophenol (2,4-DNP), 
      respectively. Throughout the study the hydraulic retention time (HRT) and 
      COD/NO3-N ratio were kept as 24 h and 10, respectively. 2-Aminophenol (2-AP), 
      4-aminophenol (4-AP) and 2-amino,4-nitrophenol (2-A,4-NP) were found as the major 
      intermediate metabolites of 2-NP, 4-NP and 2,4-DNP degradation, respectively. 
      Methanol was found to be a better carbon source for 4-NP and 2,4-DNP degradation 
      as compared to acetate and glucose, while 2-NP degradation was not influenced 
      much by the change of substrate. Nitrate nitrogen removal was always more than 
      99%. COD removal efficiency of the nitrophenol fed reactors varied from 85.7% to 
      97.7%. The oxidation-reduction potential (ORP) inside the reactors dropped, up to 
      -300 mv, with glucose as carbon source. As the reactors were switched over to 
      methanol, ORP increased to -190 mv. The granular sludge developed inside the 
      reactors was light brown in colour when acetate and glucose were used as 
      substrate, which turned dark brown to black at the end of methanol run. Biomass 
      yield in terms of volatile suspended solids was observed as 0.15, 0.089 and 0.14 
      g per gram of COD removal for acetate, glucose and methanol, respectively.
FAU - Karim, Khursheed
AU  - Karim K
AD  - Department of Chemical Engineering, Washington University, Mail Box 1198, One 
      Brookings Drive, Saint Louis, MO 63130, USA. karim@che.wustl.edu
FAU - Gupta, S K
AU  - Gupta SK
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - Netherlands
TA  - Biodegradation
JT  - Biodegradation
JID - 9100834
RN  - 0 (Acetates)
RN  - 0 (Aminophenols)
RN  - 0 (Culture Media)
RN  - 0 (Nitrophenols)
RN  - 7440-44-0 (Carbon)
RN  - IY9XDZ35W2 (Glucose)
RN  - Y4S76JWI15 (Methanol)
SB  - IM
MH  - Acetates/metabolism/pharmacology
MH  - Aminophenols/metabolism
MH  - Biodegradation, Environmental
MH  - Biomass
MH  - Carbon/*metabolism
MH  - Culture Media
MH  - Glucose/metabolism/pharmacology
MH  - Methanol/metabolism/pharmacology
MH  - Nitrophenols/*metabolism
MH  - Spectrophotometry, Ultraviolet
EDAT- 2003/04/12 05:00
MHDA- 2003/10/22 05:00
CRDT- 2003/04/12 05:00
PHST- 2003/04/12 05:00 [pubmed]
PHST- 2003/10/22 05:00 [medline]
PHST- 2003/04/12 05:00 [entrez]
AID - 10.1023/a:1022364616575 [doi]
PST - ppublish
SO  - Biodegradation. 2002;13(5):353-60. doi: 10.1023/a:1022364616575.