Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1976-12-22
1979-01-30
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
71 10, 71 12, 210 18, 210 28, 210 48, 210 53, 210DIG28, 210DIG29, C02B 120, C02C 114
Patent
active
041371585
ABSTRACT:
A process for the tertiary treatment of biochemical waste waters comprising the following 4 main steps; (1) adding milk of lime to waste water from the anaerobic digestion treatment process to render the waste water alkaline and recovering NH.sub.3 by reduced pressure distillation, (2) contacting recovered NH.sub.3 with a weakly acidic ion exchange resin to make NH.sub.3 adsorbed in the ion exchanger resin, (3) adding acid to the adsorbed ammonia to form an ammonia salt, and (4) blowing CO.sub.2 into the treated water from which NH.sub.3 has been removed, to thereby recover P, and subjecting the treated water from which N and P have been removed to the activated sludge treatment to remove BOD.
REFERENCES:
patent: 3236766 (1966-02-01), Levin
patent: 3423309 (1969-01-01), Albertson
patent: 3475330 (1969-10-01), Gilles
patent: 3546111 (1970-12-01), Busch
patent: 3586625 (1971-06-01), Cole et al.
patent: 3842000 (1974-10-01), Dawson
patent: 3930998 (1976-01-01), Knopp et al.
Haga Ryooichi
Ishida Masahiko
Odawara Youji
Beall, Jr. Thomas E.
Hart Charles N.
Hitachi , Ltd.
Hruskoci Peter A.
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