Liquid purification or separation – Processes – Treatment by living organism
Patent
1995-06-27
1996-07-09
McCarthy, Neil M.
Liquid purification or separation
Processes
Treatment by living organism
210630, 210631, 210761, 210762, 210763, C02F 330, C02F 1108, C02F 172
Patent
active
055341489
ABSTRACT:
A process for purifying a photographic waste solution is disclosed. The photographic waste solution is purified by successively performing: noncatalytic wet oxidation at a temperature of from 140.degree. C. up to 370.degree. C. under such a pressure as to hold said waste solution in a liquid phase while supplying an oxygen-containing gas thereto; solid-liquid separation of the solid matters and/or suspended matters thus formed; catalytic wet oxidation at a temperature of from 140.degree. C. up to 370.degree. C. under such a pressure as to hold said waste solution in a liquid phase while supplying an oxygen-containing gas thereto; and a biological treatment comprising a combination of an aerobic biological treatment with an anaerobic biological treatment.
REFERENCES:
patent: 4699720 (1987-10-01), Harada et al.
patent: 4874530 (1989-10-01), Kobayashi et al.
patent: 5405532 (1995-04-01), Loew et al.
Hori Kiyotaka
Mitsui Kiichiro
Shiota Yusuke
Suzuki Seiji
Fuji Photo Film Co. , Ltd.
McCarthy Neil M.
Nippon Shokubai Co. , Ltd.
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