PMID- 12830950
OWN - NLM
STAT- MEDLINE
DCOM- 20031007
LR  - 20121115
IS  - 0273-1223 (Print)
IS  - 0273-1223 (Linking)
VI  - 47
IP  - 9
DP  - 2003
TI  - Biodegradation of MTBE and BTEX in an aerobic fluidized bed reactor.
PG  - 123-8
AB  - An aerobic fluidized bed reactor (FBR) was operated for the removal of methyl 
      tert-butyl (MBE) and benzene, toluene, ethylbenzene, and p-xylene (BTEX) from 
      water. The reactor was seeded with a mixed culture adapted to MTBE. Granular 
      activated carbon (GAC) was used as the biological attachment medium. Influent 
      MTBE to the reactor was 7.8 mg/L MTBE, with a flow rate of 22.7 L/day, and an 
      empty bed contact time of 1 hour. The acclimation period required was relatively 
      short, about 30 days before reaching an average stable effluent concentration of 
      18.5 +/- 10 microg/L. BTEX was introduced to the feed at an equivalent chemical 
      oxygen demand (COD) as the MTBE at day 225 and was biodegraded spontaneously with 
      no apparent acclimation period required. The average influent of each of the four 
      BTEX compounds was about 2 mg/L, and the range of the average effluent 
      concentrations wae 1.4-2.2 microg/L. After achieving 180 days of stable 
      performance with BTEX addition, the total low rate to the reactor was gradually 
      increased by 20% increments to 160% of the original flow (36.4 L/day). Increases 
      by 20% and 40% had no apparent effect on reactor performance, but increase by 60% 
      required 30 days before effluent quality returned to previous values. Composition 
      of the culture was monitored throughout operation of the reactor using denaturing 
      gradient gel electrophoresis (DGGE). The culture consisted of 
      Flavobacteria-Cytophaga and organisms with high similarity to the known MTBE 
      degrader PM1.
FAU - Pruden, A
AU  - Pruden A
AD  - Department of Civil and Environmental Engineering, University of Cincinnati, 
      Cincinnati, OH 45221-0071, USA.
FAU - Sedran, M
AU  - Sedran M
FAU - Suidan, M
AU  - Suidan M
FAU - Venosa, A
AU  - Venosa A
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - England
TA  - Water Sci Technol
JT  - Water science and technology : a journal of the International Association on 
      Water Pollution Research
JID - 9879497
RN  - 0 (Carcinogens)
RN  - 0 (Hydrocarbons, Aromatic)
RN  - 0 (Methyl Ethers)
RN  - 29I4YB3S89 (methyl tert-butyl ether)
SB  - IM
MH  - Bacteria, Aerobic/physiology
MH  - Bioreactors
MH  - Carcinogens/*metabolism
MH  - Electrophoresis, Gel, Two-Dimensional
MH  - Hydrocarbons, Aromatic/*metabolism
MH  - Methyl Ethers/*metabolism
MH  - Water Purification/*methods
EDAT- 2003/07/02 05:00
MHDA- 2003/10/08 05:00
CRDT- 2003/07/02 05:00
PHST- 2003/07/02 05:00 [pubmed]
PHST- 2003/10/08 05:00 [medline]
PHST- 2003/07/02 05:00 [entrez]
PST - ppublish
SO  - Water Sci Technol. 2003;47(9):123-8.