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Method of treating sewage sludge

Patent ·
OSTI ID:6372396
;

A method of treating sewage sludge is disclosed. The method makes use of an unitary multi-hearth furnace and the sewage sludge is dried in an upper part of the furnace and subjected to pyrolyzation in a lower part thereof to cause the sewage sludge to be reduced to ashes whereby a relatively small amount of exhaust gas is produced. The exhaust gas is also utilized as a heat supply source.

Assignee:
NGK Insulators, Ltd.
Patent Number(s):
US 4050390
OSTI ID:
6372396
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320604 -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
42 ENGINEERING
420900* -- Engineering-- Waste Processing Plants & Equipment-- (-1989)
CHEMICAL REACTIONS
DECOMPOSITION
DESIGN
FURNACES
INDUSTRIAL PLANTS
OPERATION
PYROLYSIS
SEWAGE
SEWAGE SLUDGE
THERMOCHEMICAL PROCESSES
WASTE PROCESSING PLANTS
WASTES