Process and apparatus for dehydrating waste solids concentrates

Patent · Tue Mar 22 00:00:00 EST 1983

OSTI ID:6455459

Bonanno, A J; Greenfield, C

An apparatus and process for dehydrating waste solids concentrates including secondary and digested sewage sludges and those concentrates prone to form emulsions upon the addition of oil are obtained and accomplished by mixing the sludge or other concentrate with fluidizing oil prior to dehydration by heat evaporation to maintain pumpability; recycling a portion of the substantially anhydrous waste solids and oil evaporator output slurry, and admixing it with the fluidizing oil and input sludge or concentrate to regulate the solids content and viscosity of the steady state feed mixture and thereby prevent fouling of the evaporator heat transfer surfaces and convert emulsions to suspensions.

• Assignee: Hanover Research Corp.
• Patent Number(s): US RE 31185
• OSTI ID: 6455459
• Resource Relation: Patent File Date: Filed date 9 Mar 1982; Other Information: PAT-APPL-356346
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
SEWAGE SLUDGE
DEHYDRATION
SOLID WASTES
WASTE PROCESSING
EMULSIONS
EVAPORATION
OILS
COLLOIDS
DISPERSIONS
MANAGEMENT
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
SEWAGE
SLUDGES
WASTE MANAGEMENT
WASTES
320604* - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)