Apparatus for treating sewage sludge

Details Apparatus for treating sewage sludge Apparatus for treating sewage sludge

1976-03-08

1977-11-08

Spear, Jr., Frank A.

Chemistry: physical processes

Physical processes

Crystallization

71 28, 71 64DA, 210152, 210197, C05F 306

Patent

active

040573923

ABSTRACT:
An apparatus for and a process of treating sludge filter cake and the granular product thereof which comprises reducing the particle size and moisture content of the sludge cake, sterilizing the sludge cake by contacting the sludge cake with an N-methylol-urea solution, reacting the N-methylol-urea solution with the sludge cake at a pH of 3 to 5 while agitating the sludge particles to provide a granular-reaction product, and drying the product to provide a granular, high-nitrogen, odorless fertilizer or animal feed supplement product.

REFERENCES:
patent: 1977644 (1934-10-01), Paxton
patent: 2976126 (1961-03-01), Seymour
patent: 2977214 (1961-03-01), McLellan
patent: 3873734 (1975-03-01), Higgins et al.

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