Microbiological method for eliminating halogenated ethenes

Patent 6218172 Issued on April 17, 2001. Estimated Expiration Date:

April 6, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Inventors

Assignee

Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

Application

No. 284027 filed on 04/06/1999

US Classes:

435/262.5, Destruction of hazardous or toxic waste210/610, Including adding ancillary growth medium for microorganism435/266Treating gas, emulsion, or foam

Examiners

Primary: Beisner, William H.

Attorney, Agent or Firm

Barnes & Thornburg

Foreign Patent References

40 09 109 A1 DE. 09/13/1991
41 42 063 A1 DE. 06/13/1993
0 336 718 EP. 11/13/1989
0 447 862 EP. 09/13/1991

International Class

C12S 013/00

Foreign Application Priority Data

1996-10-07 DE

Abstract

Process for the microbiological clean up of halogenated ethenes, characterized in that bacterial strains which are growing with ethene as carbon and energy source and break down halogenated ethenes are preadapted with ethene as carbon and energy source for new formation and for energy supply and are contacted in an aerobic bioreactor with the halogenated ethenes to be cleaned up.

Other References

Fan et al. "Biodegradation of Trichloroethylene and Toluene by Indigenous Microbial Populations in Soil." Applied and Environmental Microbiology. vol. 59, No. 6 (Jun. 1993), pp. 1911-1918.
Freedman et al. Caplus Abstract No. 1996:374360 of "The effect of BTEX compounds on aerobic cometabolizm of vinyl chloride by ehtylene grown enrichments." Proc. Water Environment. Fed. Annu. Conf. Expo., 68th (1995), vol. 2, pp. 603-613.
Gerritse et al. "Complete degradation of tetrachloroethene by combining anaerobic dechlorinating and aerobic methanotropic enrichment cultures." Appl. Microbiol. Biotechnol. vol. 43 (1995), pp. 920-92