Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1978-03-24
1979-09-11
Castel, Benoit
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 14, 210 16, 210 17, 210 18, 210 20, 210DIG28, 210DIG29, C02C 104
Patent
active
041674790
ABSTRACT:
A purification process for the removal of biodegradable suspended and dissolved organic solids, nitrogenous compounds and phosphates from contaminated water by biological and chemical reactions carried out simultaneously in active media of a biological waste treatment reaction system. The process comprises adding a finely divided mineral or mixture of minerals to the reaction system. Various levels of oxygen in the system are maintained to provide for biological oxidation of organic compounds and biological nitrification of nitrogen containing compounds and subsequent biological denitrification of the formed nitrites and nitrates. The selection of the mineral is such that through its dissociation in the system, the released metal ions are capable of precipitating a portion of ionic species, particularly phosphates present in the processed waste water, at the operating pH range of 6 to 8. The surfaces of the mineral attract micro-organisms and suspended solids to facilitate and enhance simultaneously occuring biological and chemical reactions.
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patent: 3480144 (1969-11-01), Barth et al.
patent: 3697420 (1972-10-01), Blaisdell et al.
patent: 3846289 (1974-11-01), Jeris et al.
patent: 3855120 (1974-12-01), Garbo
patent: 3904518 (1975-09-01), Hutton et al.
patent: 3957632 (1976-05-01), Knopp et al.
patent: 3980556 (1976-09-01), Besik
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