Chemical conditioning of liquid and semi-liquid sludge for dewat

Details Chemical conditioning of liquid and semi-liquid sludge for dewat Chemical conditioning of liquid and semi-liquid sludge for dewat

1997-08-22

1999-06-29

Woo, Jay H.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210738, 210764, 210770, 210916, C02F 152

Patent

active

059164484

ABSTRACT:
A method is provided for improving the dewatering and odor reduction characteristics of a liquid wastewater sludge, sediment, or soils to ultimately form a dewatered solid residual that includes nutrition enhancement of a resultant material that is suitable for distribution and marketing, and for incorporation in a fertilizer blend. The material meets Class A pathogen reduction by achieving disinfecting conditions. The method includes the addition of selective acids and bases to the liquid sludge which forms insoluble precipitates, and enmeshes the solids in the sludge to form a granular product. The method's applicability includes municipal, agricultural, food processing, industrial liquid and semi-liquid sludges, sediments, and soils.

REFERENCES:
patent: 4793927 (1988-12-01), Meehan et al.
patent: 5125951 (1992-06-01), Cahoda et al.
patent: 5246596 (1993-09-01), Baldwin, Jr. et al.
patent: 5281341 (1994-01-01), Reimers et al.
patent: 5385673 (1995-01-01), Fergen

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