Liquid purification or separation – Automatic control – Thermal
Patent
1988-04-28
1990-05-22
Wyse, Tom
Liquid purification or separation
Automatic control
Thermal
210177, 210187, 210207, 210533, C02F 1104
Patent
active
049275305
ABSTRACT:
A sludge processing apparatus is provided that includes a processing tank, in which sludge flowing in through a sluge inflow pipe is deposited and processed, a submersible pump disposed in the center of bottom of the processing tank to take in the sludge laid on the bottom of the tank and spout it upward to a liquid surface, a circulation guide plate for circulating the sludge spouted by the submersible pump through the whole tank, a chemical feeder for feeding to the processing tank a selected chemical for promoting activity of anaerobic bacteria carrying out anaerobic digestion, a hot water pipe disposed in the vicinity of the bottom of the processing tank, a heating-and-circulating device for heating a heating medium and circulating it through the hot water pipe, temperature control means for controlling a temperature of sludge in the processing tank to be required value, and a drain pump for pumping supernatant water left after processing of the sludge out of the tank through a drain pipe. The method according to this invention combines the corresponding steps.
REFERENCES:
patent: 3255887 (1966-06-01), Walker et al.
patent: 3981803 (1976-09-01), Coulthard
patent: 4172034 (1979-10-01), Carlsson et al.
patent: 4293412 (1981-10-01), Lescure
Australian Patent Application 31432/84.
Ueda Chie
Ueda Etsuko
Ueda Iwao
Wyse Tom
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