Liquid purification or separation – Processes – Separating
Patent
1979-06-21
1981-01-06
Therkorn, Ernest G.
Liquid purification or separation
Processes
Separating
210 97, 210181, 210918, 62238E, 62324D, C02F 300
Patent
active
042435226
ABSTRACT:
Method and apparatus for utilizing the heat content in waste water which has passed through a biological purification plant, the last step of which comprises subjecting the waste water to sedimentation in a settlement tank. A heat pump is provided having an evaporator section which is heated by means of the waste water which has been purified in the settlement tank which is directed to it through a first conduit. During periods in which the flow rate of the waste water through the purification plant is less than the average flow rate which corresponds to the capacity of the heat pump, at least a portion of the waste water which flows through the evaporator of the heat pump is recirculated to the settlement tank, the latter being utilized as a heat reservoir according to the present invention.
REFERENCES:
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patent: 3824186 (1974-07-01), Erickson
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patent: 3986344 (1976-10-01), Newman
patent: 4006857 (1977-02-01), Adrian
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patent: 4184856 (1980-01-01), Thoren
Baumgarten Per
Jorgensen Ernst K.
Ter-Borch Poul E.
I. Kruger A/S
Therkorn Ernest G.
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