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Titolo:
Methyl tert-butyl ether (MTBE) degradation by a microbial consortium
Autore:
Fortin, NY; Morales, M; Nakagawa, Y; Focht, DD; Deshusses, MA;
Indirizzi:
Univ Calif Riverside, Dept Chem Engn, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 Engn, Riverside, CA 92521 USA Univ Calif Riverside, Dept Environm Engn, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 Engn, Riverside, CA 92521 USA Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 thol, Riverside, CA 92521 USA
Titolo Testata:
ENVIRONMENTAL MICROBIOLOGY
fascicolo: 6, volume: 3, anno: 2001,
pagine: 407 - 416
SICI:
1462-2912(200106)3:6<407:MTE(DB>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIXED CONTINUOUS CULTURES; ANAEROBIC BIODEGRADATION; NITROSOMONAS-EUROPAEA; OXYGEN CONCENTRATIONS; BIOTRICKLING FILTERS; GASOLINE; GROWTH; MICROORGANISMS; COMPETITION; KINETICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Deshusses, MA Univ Calif Riverside, Dept Chem Engn, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 e, CA 92521 USA
Citazione:
N.Y. Fortin et al., "Methyl tert-butyl ether (MTBE) degradation by a microbial consortium", ENVIRON MIC, 3(6), 2001, pp. 407-416

Abstract

The widespread use of methyl tert-butyl ether (MTBE) as a gasoline additive has resulted in a large number of cases of groundwater contamination. Bioremediation is often proposed as the most promising alternative after treatment. However, MTBE biodegradation appears to be quite different from the biodegradation of usual gasoline contaminants such as benzene, toluene, ethyl benzene and xylene (BTEX). In the present paper, the characteristics of aconsortium degrading MTBE in liquid cultures are presented and discussed. MTBE degradation rate was fast and followed zero order kinetics when added at 100 mg l(-1). The residual MTBE concentration in batch degradation experiments ranged from below the detection limit (1 mug l(-1)) to 50 mug l(-1). The specific activity of the consortium ranged from 7 to 52 mg(MTBE) g(dw)(-1) h(-1) (i.e. 19-141 mg(COD) g(dw)(-1) h(-1)). Radioisotope experiments showed that 79% of the carbon-MTBE was converted to carbon-carbon dioxide. The consortium was also capable of degrading a variety of hydrocarbons, including tert-butyl alcohol (TBA), tert-amyl methyl ether (TAME) and gasolineconstituents such as benzene, toluene, ethylbenzene and xylene (BTEX). Theconsortium was also characterized by a very slow growth rate (0.1 d(-1)), a low overall biomass yield (0-11 g(dw) g(MTBE)(-1); i.e. 0.040 g(dw) g(COD)(-1)), a high affinity for MTBE and a low affinity for oxygen, which may be a reason for the slow or absence of MTBE biodegradation in situ. Still, the results presented here show promising perspectives for engineering the in situ bioremediation of MTBE.

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Documento generato il 05/04/20 alle ore 19:40:25