Process for dehydration and concentration of sewage sludge

Details Process for dehydration and concentration of sewage sludge Process for dehydration and concentration of sewage sludge

1995-03-21

1997-04-29

Hruskoci, Peter A.

Liquid purification or separation

Processes

Treatment by living organism

210610, 210626, 210631, 210728, 210729, C02F 1114

Patent

active

056245645

ABSTRACT:
In a process for dehydration and concentration of sewage sludge containing activated sludge with the aid of organic and/or inorganic flocculators, the activated sludge content is produced in an aerated biological purification stage in presence of a composition containing
a) folic acid and/or dihydrofolic acid or at least one ammonium, alkali metal, alkaline earth metal and/or alkanolammonium salt thereof and
b) a water-soluble molybdenum compound,
whereby an improved sludge dehydration of the activated sludge content is achieved.

REFERENCES:
patent: 4429043 (1984-01-01), Paton
patent: 4931442 (1990-06-01), Blum
patent: 4956092 (1990-09-01), Blum
patent: 5340376 (1994-08-01), Cunningham
patent: 5403488 (1995-04-01), Volsch
Author Ludwig Hartman; reference: ISBN 3-540-50810-4 2.Aufl. Springer-Verlag Berlin Heidelberg New York, untranslated German article, 1989.
Author Professor Dr. Gerhart Drews, Institute of Biology; reference ISBN 3-540-1183605 4.Aufl. Springer-Verlag Berlin Heidelberg New York Tokyo; untranslated German article, 1983.
"A Non-Conventional Solution to an Old Problem," Sharon J. Ostrander, Operations Forum, vol. 9, No. 1, Jan., 1992, pp. 10-13.
"dosfolat.RTM. XS Provides Sludge Bulking Control at Lower Cost for the Twon of Suffield, CT.," publication by Bioprime, Ltd., P.O. Box 716, 303 Route 5 South, Norwich, VT 05055, 1996.

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