Sludge treatment

Details Sludge treatment Sludge treatment

1988-01-15

1989-04-04

Wyse, Tom

Liquid purification or separation

Processes

Treatment by living organism

210613, 210770, 210774, 71 10, 48111, C02F 1104

Patent

active

048184055

ABSTRACT:
Municipal sludge is converted from an environmental problem into soil amendment and electricity. Methane, produced in an anaerobic digester (2), is used partially to generate electricity and partially to dry the concentrated sludge in a rotary dryer (7). Excess heat from the dryer is used to maintain the temperature in the digester at approximately 105.degree. to 130.degree. F. Heavy metals are removed so that the dried sludge can be safely used as a soil amendment.

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patent: 4632758 (1986-12-01), Whittle
patent: 4657681 (1987-04-01), Hughes et al.
patent: 4769149 (1988-09-01), Nobilet et al.

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