Chemistry: molecular biology and microbiology – Process of utilizing an enzyme or micro-organism to destroy... – Destruction of hazardous or toxic waste
Reexamination Certificate
2007-01-23
2007-01-23
Beisner, William H. (Department: 1744)
Chemistry: molecular biology and microbiology
Process of utilizing an enzyme or micro-organism to destroy...
Destruction of hazardous or toxic waste
C435S253100, C435S821000, C435S863000, C210S611000
Reexamination Certificate
active
10129627
ABSTRACT:
A process for the treatment of aqueous effluents containing at least one of the following ethers is described: ethyl tert-butyl ether (ETBE) and/or methyl tert-butyl ether (MTBE) and/or tert-amyl methyl ether (TAME) in order to reduce the concentration of these ethers. A bacteriumGordonia terraeCIP I-2194 is innoculated under aerobic conditions. In particular, a bacteriumBurkholderia cepaciaCIP I-2052 or a bacteriumAlcaligenessp. CIP I-2561 or a bacteriumMycobacteriumsp. CIP I-2562 is added in the presence of a growth substrate and, optionally, of a cobalt salt, and the ether contained in the effluents is degraded by the bacteria thus innoculated until its mineralization. The process is useable in the ether-contaminated water treatment industry.
REFERENCES:
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patent: 6254777 (2001-07-01), Hernandez et al.
patent: 6632649 (2003-10-01), Pivetau et al.
patent: 2766478 (1999-01-01), None
Fayolle et al: “Isolation of two aerobic bacterial strains that degrade efficiently ethyl t-butyl ether (ETBE)” Biotechnology Letters, GB, Kew, Surrey, vol. 20, No. 3, Mar. 1998, pp. 283-286-288, XP002115642, ISSN: 0141-5492.
Fayolle Francoise
Francois Alan
Hernandez Guillermina
Monot Frederic
Piveteau Pascal
Beisner William H.
Institut Fracois du Petrole
Millen White Zelano & Branigan P.C.
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