发明名称 |
Biological system for degrading nitroaromatics in water and soils |
摘要 |
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.
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申请公布号 |
US5616162(A) |
申请公布日期 |
1997.04.01 |
申请号 |
US19950545903 |
申请日期 |
1995.10.20 |
申请人 |
IDAHO RESEARCH FOUNDATION, INC. |
发明人 |
CRAWFORD, DONALD L.;STEVENS, TODD O.;CRAWFORD, RONALD L. |
分类号 |
A62D3/00;A62D3/02;B09C1/10;C02F3/12;C02F3/28;C02F3/30;C02F3/34;C12N1/20;(IPC1-7):C02F11/08;C02F3/00;C05G3/00 |
主分类号 |
A62D3/00 |
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