Sludge treating apparatus
Patent
·
OSTI ID:5579915
A sludge treating apparatus comprises a centrifugal condensing machine for forcedly condensing a raw sludge produced by a waste water treating apparatus. The raw sludge condensed to approximately 94 to 90% in terms of the percentage of moisture content by means of the centrifugal condensing machine is introduced into an anaerobic digestion tank of a deep well type, where the raw sludge undergoes an anaerobic digestion, and a digested sludge obtained from the anaerobic digestion tank is then dewatered by means of a dewatering apparatus such as a belt press, whereupon the dewatered sludge is applied to a post-treatment apparatus. In execution of the anaerobic digestion process, the reactions corresponding to an acid fermentation stage and acid regression stage may be carried out in advance in separate tanks and the reaction corresponding to an alkaline fermentation stage may be mainly performed in an anaerobic digestion tank.
- Assignee:
- Kubota Ltd (Japan)
- Patent Number(s):
- US 4388186
- OSTI ID:
- 5579915
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420900* -- Engineering-- Waste Processing Plants & Equipment-- (-1989)
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CENTRIFUGATION
CHALCOGENIDES
DIGESTION
FERMENTATION
FLUID FLOW
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
REMOVAL
SEPARATION PROCESSES
SLUDGES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER REMOVAL
420900* -- Engineering-- Waste Processing Plants & Equipment-- (-1989)
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CENTRIFUGATION
CHALCOGENIDES
DIGESTION
FERMENTATION
FLUID FLOW
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
REMOVAL
SEPARATION PROCESSES
SLUDGES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER REMOVAL