Porous cellulose carrier for immobilizing microorganisms to conv

Details Porous cellulose carrier for immobilizing microorganisms to conv Porous cellulose carrier for immobilizing microorganisms to conv

1996-03-26

1999-08-10

Naff, David M.

Chemistry: molecular biology and microbiology

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

Destruction of hazardous or toxic waste

435 41, 435128, 435179, 536 56, B09B 300, C12N 1112, C08B 504, C12P 100

Patent

active

059358440

ABSTRACT:
A carrier for immobilizing microorganisms is prepared by producing a porous cellulose derivative by reacting porous cellulose such as foamed cellulose with a compound selected from the group consisting of a compound having an epoxy group, an N-methylol compound, an imidazolidinone compound, a compound having an aldehyde group, an acetal compound, an active vinyl compound, an aziridinyl compound, a compound having a carboxyl group, a compound having an acyl group, a quaternary ammonium compound, an amidophosphazene compound and a compound having an isocyanate group. The carrier may also be formed by coating the porous cellulose or the porous cellulose derivative with a compound obtained by reacting a compound containing an epoxy group with a polyamine compound. The porous cellulose may have a pore diameter ranging from 30 to 2000 .mu.m. The carrier may be used in converting harmful nitrogen compounds into harmless compounds in a liquid such potable water or wastewater. The carrier and liquid to be treated are added to a nitrification treatment tank under aerobic conditions and/or a denitrification treatment tank under anaerobic conditions, microorganisms are immobilized on the carrier and nitrogen compounds are converted. The carrier may also be added to other liquid treatment tanks where microorganisms are immobilized for treatment.

REFERENCES:
patent: 4687808 (1987-08-01), Jarrett et al.
patent: 4756831 (1988-07-01), Menzel et al.
patent: 5135542 (1992-08-01), Sasakura et al.
patent: 5200471 (1993-04-01), Coleman et al.
patent: 5298615 (1994-03-01), Matsui et al.

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