METHOD OF PURIFYING CONTAMINATED SOIL USING MICROORGANISM

Title:

METHOD OF PURIFYING CONTAMINATED SOIL USING MICROORGANISM

Document Type and Number:

WIPO Patent Application WO/2003/059544

Kind Code:

A1

Abstract:

Contaminated soil is purified while neither affecting the environment nor requiring any post-treatments (pH adjustment, etc.) for preventing the same, even in the case where the contaminated soil has a high viscosity. A method of purifying contaminated soil with the use of a microorganism which comprises: digging contaminated soil comprising clay or silt as the main component and containing trichloroethylene as a contaminant and transiently placing the soil on the ground (Step 101); adding perlite 2, which falls within the category of inorganic soil improving materials to be used as soil improving materials, and a microorganism 3 capable of degrading trichloroethylene (Step 102); mixing the contaminated soil with the additives under agitation so that the void water contained in the clay or silt is absorbed by the perlite 2 (Step 103); and blowing air into the contaminated soil 1 to thereby microbially degrade trichloroethylene (Step 104).

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Inventors:

FUJII KENSUKE (JP)
IDE KAZUKI (JP)
ISHIKAWA YOJI (JP)
ODA YASUSHI (JP)
HAMAZAKI MOTOKI (JP)

Application Number:

PCT/JP2002/013065

Publication Date:

July 24, 2003

Filing Date:

December 13, 2002

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
FUJII KENSUKE (JP)
IDE KAZUKI (JP)
ISHIKAWA YOJI (JP)
ODA YASUSHI (JP)
HAMAZAKI MOTOKI (JP)

International Classes:

B09C1/10; C12N1/20; C09K17/02; C09K101/00; (IPC1-7): B09C1/10

Domestic Patent References:

WO1994025628A1

1994-11-10

Foreign References:

JP2001081464A	2001-03-27
JPH07188659A	1995-07-25
JP2001232344A	2001-08-28
JPH08112586A	1996-05-07

Other References: