Mechanical dewatering process

Patent · Tue Mar 07 00:00:00 EST 1989

OSTI ID:6245224

Lau, F S; Mensinger, M C; Pyrcioch, E J

This patent describes a process for mechanically dewatering high moisture content organic carbonaceous materials comprising the steps of: adding hard, non-porous solid particulates and mixing the particulates with the organic materials evenly distributing the particulates throughout the organic materials and particulates admixture, the particulates comprising abut 25 to about 60 weight percent of the admixture; mechanically dewatering the admixture by a mechanical dewatering emans capable of delivering pressure of at least 50 psi, the solid particulates providing in situ dewatering of the organic carbonaceous materials at sites on surfaces of the non-porous solid particulates; removing water released from the admixture during dewatering; and separating the particulates from the organic materials to provide a dewatered organic carbonaceous product unaltered in physical and chemical properties from the organic carbonaceous feed material, except for the reduction in moisture content. The patent further describes an improved process, wherein the high moisture content organic carbonaceous materials comprise about 55 to about 98 weight percent total water; and a second improved process, wherein the high moisture content organic carbonaceous materials are selected from the group consisting of peat, agricultural waste, municipal waste, sewage sludge, biomass, and mixtures thereof.

• Assignee: Institute of Gas Technology, Chicago, IL
• Patent Number(s): US 4810257
• OSTI ID: 6245224
• Resource Relation: Patent File Date: Filed date 12 Mar 1986
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
09 BIOMASS FUELS
AGRICULTURAL WASTES
DEHYDRATION
BIOMASS
CARBONACEOUS MATERIALS
MUNICIPAL WASTES
PEAT
SEWAGE SLUDGE
COAL PREPARATION
MOISTURE
WASTE PROCESSING
ENERGY SOURCES
FOSSIL FUELS
FUELS
MANAGEMENT
MATERIALS
ORGANIC MATTER
ORGANIC WASTES
PROCESSING
RENEWABLE ENERGY SOURCES
SEWAGE
SLUDGES
WASTE MANAGEMENT
WASTES
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
320604 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)