Treatment of sewage sludges

Details Treatment of sewage sludges Treatment of sewage sludges

2005-12-16

2010-06-22

Hruskoci, Peter A (Department: 1797)

Liquid purification or separation

Processes

Treatment by living organism

C210S764000, C422S028000

Reexamination Certificate

active

07740762

ABSTRACT:
The present invention provides a method of reducing the pathogen content of sewage sludge comprising (a) adding to the sludge an effective amount of a phosphorous-containing compound and (b) keeping the phosphorous-containing compound in contact with the sludge for a sufficient time to reduce the amount of pathogens present in the sludge by an amount equivalent to a logarithmic reduction of 2 or more.

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Rutishauser et al. “Phosphine Formation from Sewage Sludge Cultures”, Anaerobe, Oct. 1999, pp. 525-531, vol. 5, No. 5.
International Search Report corresponding to PCT/EP 2005/013821.

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