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Method of removing metallic impurities from sewage sludge

Patent ·
OSTI ID:6163302
A method of removing metallic impurities from sewage sludge wherein the sludge is first acidified in the presence of an oxidizing agent and held to take metallic impurities into solution. The sludge is then treated with a flocculating agent and thickened by removing liquid prior to dilution with an aqueous liquid free from metallic impurities and wherein the sludge is finally dewatered by a mechanical method.
Assignee:
Simon-Carves Ltd (United Kingdom)
Patent Number(s):
US 4244818
OSTI ID:
6163302
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
320604* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
ACIDIFICATION
DEMETALLIZATION
FLOCCULATION
MANAGEMENT
MATERIALS
OXIDIZERS
PRECIPITATION
PROCESSING
REMOVAL
SEPARATION PROCESSES
SEWAGE
SEWAGE SLUDGE
TOXIC MATERIALS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER REMOVAL