Sewage sludge additive
A raw sewage treatment process of the type where settling tanks are used for the purpose of permitting the suspended matter in the raw sewage to be settled as well as to permit adsorption of the dissolved contaminants in the water of the sewage is discussed. The sludge, which settles down to the bottom of the settling tank is extracted, pyrolyzed and activated to form activated carbon and ash which is mixed with the sewage prior to its introduction into the settling tank, for the purposes mentioned. Because the sludge does not provide all of the activated carbon and ash required for adequate treatment of the raw sewage, it is necessary to add carbon to the process. In accordance with this invention, instead of expensive commercial carbon, coal is used to provide the carbon supplement.
- Assignee:
- California Institute Of Technology
- Patent Number(s):
- US 4209393
- OSTI ID:
- 5646002
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320604* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
ACTIVATED CARBON
ADDITIVES
ADSORBENTS
ADSORPTION
ALKALI METAL COMPOUNDS
ASHES
BROWN COAL
CARBON
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CATALYSIS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
LIGNITE
MANAGEMENT
MATERIALS
NONMETALS
OXYGEN COMPOUNDS
PRECIPITATION
PROCESSING
PYROLYSIS
RESIDUES
SEPARATION PROCESSES
SEWAGE
SEWAGE SLUDGE
SODIUM CARBONATES
SODIUM COMPOUNDS
SORPTION
SYNTHESIS
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PRODUCT UTILIZATION
WASTES