Methods for the degradation of environmentally persistent organi

Details Methods for the degradation of environmentally persistent organi Methods for the degradation of environmentally persistent organi

1988-04-19

1990-01-02

Tarcza, John Edward

Chemistry: molecular biology and microbiology

Process of utilizing an enzyme or micro-organism to destroy...

Destruction of hazardous or toxic waste

435911, 435254, 210611, 210632, 210909, 162 1, 162 72, C12N 0138, C12R 01645, C02F 0334, C02F 0302

Patent

active

048913200

ABSTRACT:
A process for degrading environmentally persistent organic pollutant compounds by reacting those pollutant compounds with fungal enzymes containing a lignin-degrading enzyme and hydrogen peroxide. This reaction preferably takes place under aerobic conditions such that the organic pollutant compounds are degraded. Using the present invention, degradation to carbon dioxide and water is possible. Alternatively, the reaction may be halted to leave desirable reaction intermediates.
The enzyme and hydrogen peroxide system of the present invention is found to be ideal for degrading various types of orgaic pollutants. Moreover, the reaction system is nonspecific. As a result, only a single type of fungus or fungus-generated enzyme system is required in order to degrade a wide spectrum of pollutants.
One embodiment of the present invention relates to a preferred process where the enzyme (peroxidase) and hydrogen peroxide are provided by a lignin-degrading fungi or fungi mixed with the pollutant organic compound. Adding the living fungus avoids the need for introducing the hydrogen peroxide and enzyme periodically into the reaction mix, since the fungus produces both the extracellular enzyme and hydrogen peroxide.

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