Liquid purification or separation – Processes – Treatment by living organism
Patent
1982-06-14
1983-11-22
Spitzer, Robert H.
Liquid purification or separation
Processes
Treatment by living organism
210626, 210758, 210765, 210170, 2101951, 210220, 2102211, 261 36R, 261121R, C02F 322, C02F 326
Patent
active
044167814
ABSTRACT:
A method for the secondary treatment of sewage (and apparatus therefor) having a step in which sewage is circulated in a system having a riser and a downcomer communicating with each other at their upper and lower ends and in which an oxygen-containing gas is supplied to the sewage as it passes through the downcomer. The method is intended for use in the aeration and/or digestion steps of the secondary treatment of sewage. The riser and downcomer are preferably located in a shaft extending into the ground for at least 40 meters below a basin containing the sewage.
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Bailey Martin
Hines David A.
Ousby John C.
Roesler, deceased Frank C.
Roesler, executrix by Johanna M.
Imperial Chemical Industries plc
Spitzer Robert H.
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