Method for processing activated sludge into useful products

Details Method for processing activated sludge into useful products Method for processing activated sludge into useful products

1977-01-21

1978-10-10

Shapiro, Lionel M.

Textiles: fiber preparation

260112R, 210 18, 426635, 426656, 195 28R, C02C 102, A23J 100, A23K 100, C12B 300

Patent

active

041194950

ABSTRACT:
A method for processing activated sludge into useful products comprises hydrolysis of activated sludge at a pH of 0.01 to 6.0 at a temperature of 50.degree. to 150.degree. C with subsequent separation of formed water-soluble protein, carbohydrate and mineral substances and vitamins, and/or alkaline extraction of the initial activated sludge at a pH of 9 to 13 at a temperature of 40.degree. to 90.degree. C with subsequent separation of proteins from the extract.
The invention makes it possible to simultaneously obtain useful products and solve the problem of utilization of activated sludge formed in great excess in biological purification of effluents, thereby ensuring intensification of purification of effluents, improvement of the quality of the purified water and decrease in the pollution of the environment.

REFERENCES:
patent: 2544273 (1951-03-01), Miner, Jr. et al.
patent: 3585179 (1971-06-01), Samejima et al.
patent: 3718541 (1973-02-01), Kalina
patent: 3862112 (1975-01-01), Ishida et al.
patent: 3936375 (1976-02-01), Nettli

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