Title:
【発明の名称】水および土壌におけるニトロ芳香族物質を分解するための生物学系
Document Type and Number:
Japanese Patent JP3068647
Kind Code:
B2
Abstract:
Novel methods for biodegrading nitroaromatic compounds present as contaminants in soil or water using microorganisms are disclosed. Water is treatable directly; dry soil is first converted into a fluid medium by addition of water. The preferred method comprises two stages, each employing microorganisms: a fermentative stage, followed by an anaerobic stage. The fermentative stage is rapid, wherein an inoculum of aerobic and/or facultative microorganisms ferments a carbohydrate added to the fluid medium, exhausting the oxygen in the fluid medium and thereby inhibiting oxidative polymerization of amino by-products of the nitroaromatics. In the subsequent anaerobic stage, an inoculum of a mixed population of anaerobic microorganisms completes the mineralization of the contaminant nitroaromatics, using the remaining carbohydrate as a carbon and energy source. Preferably, the carbohydrate is a starch and the aerobic and/or facultative microorganisms are amylolytic, which cleave the starch at a moderate rate throughout both stages, ensuring a sustained supply of metabolizable carbohydrate. The microorganisms are preferably selected to be resistant to the types and concentrations of nitroaromatics present as contaminants.
Inventors:
Crawford, Donald El.
Stevens, Todd Oh.
Crawford, Ronald El.
Stevens, Todd Oh.
Crawford, Ronald El.
Application Number:
JP50860091A
Publication Date:
July 24, 2000
Filing Date:
April 09, 1991
Export Citation:
Assignee:
Idaho Research Foundation Inc.
International Classes:
A62D3/02; B09C1/10; C02F3/00; C02F3/12; C02F3/28; C02F3/30; C02F3/34; C05F11/08; A01N33/22; C05G3/00; C07C205/23; C09K17/32; C09K101/00; (IPC1-7): A62D3/00; C02F3/30; C02F3/34
Domestic Patent References:
| JP6356280A | ||||
| JP58219998A | ||||
| JP57119885A | ||||
| JP54124557A |
Attorney, Agent or Firm:
Hidekazu Miyoshi (1 outside)