Liquid purification or separation – Processes – Chemical treatment
Patent
1983-07-12
1986-07-08
Williams, Howard S.
Liquid purification or separation
Processes
Chemical treatment
210758, 210748, 210716, 4221863, C02F 178
Patent
active
045991790
ABSTRACT:
A low cost method and apparatus for maintaining and rejuvenating a septic system in which an activated gaseous fluid formed by irradiating an oxygen containing gas, such as ambient air, with radiation having a wave-length below 200 nanometers produced by a low powered ultra-violet lamp is brought into intimate contact with liquid in the effluent chamber of a septic tank to effect a substantial reduction in the concentration of suspended solids, volatile solids and fecal coliform in the liquid and when the activated fluid is brought into intimate contact with a drainage field of a septic system clogged with water-insoluble sulfides, and polysaccharide gums and anaerobic organisms of the deposits which have clogged the drainage field are removed. The effluent from a septic tank treated with activated fluid after filtering through a sand filter and subjected to a second treatment with the activated fluid produces a discharge of surface quality water.
REFERENCES:
patent: 4021338 (1977-05-01), Harkin
patent: 4214962 (1980-07-01), Pincon
patent: 4220529 (1980-09-01), Daude-Lagrave
patent: 4351730 (1982-09-01), Bailey et al.
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