Method and system for recovering wastewater

Details Method and system for recovering wastewater Method and system for recovering wastewater

1991-10-09

1993-08-10

Lithgow, Thomas M.

Liquid purification or separation

Processes

Utilizing electrical or wave energy directly applied to...

210759, 210760, 210764, 210766, 210757, 210908, 422 24, 422 30, C02F 132, C02F 900, C02F 172

Patent

active

052346064

ABSTRACT:
Raw water such as polluted ground water can be recovered to clean water through the following processes. Firstly, oxidizing agent is added to raw water to disinfect bacteria, and then after suspended solid is removed from the water, ultraviolet rays are irradiated on the water so that organic chlorine compounds can be decomposed by active oxygen generated by the irradiation of ultraviolet rays. Finally, the residual oxidizing agent remaining in the treated water is reduced by activated carbon and catalytic resin. Further, the organic chlorine compound decomposition reaction is promoted at pH of 9 or below and in a temperature range of 15 to 30.degree. C.

REFERENCES:
patent: 3660277 (1972-05-01), McNhirtor
patent: 3772188 (1973-11-01), Edwards
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patent: 4849114 (1989-07-01), Zeff
patent: 4913827 (1990-04-01), Nebel
patent: 5043080 (1991-08-01), Cater
patent: 5180499 (1993-01-01), Hinson
Chemical Engineering Magazine Jan. 1982, "Ultraviolet Light Takes on CPI Role" by Legan.

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