Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1975-09-10
1978-07-11
Wyse, Thomas G.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
210139, 210202, 210206, 210209, 210265, 210274, 210279, C02C 104, B01D 2314
Patent
active
041000706
ABSTRACT:
An apparatus for treatment of sewage and waste materials, and while applicable to larger installations, is particularly desirable for relatively small, for example family and multi-family installations, utilizing high rate bio-chemical oxidation/physio-chemical adsorption, in which the sewage is subjected to a primary biological treatment, and a secondary settling treatment, with the primary-secondary effluent, following addition thereto of an organic-inorganic chemical material comprising prereacted floc, a phosphate precipitating material and a nonionic polyelectrolyte, operative to maintain pH and zeta potential favorable to floccuation, being subjected to a tertiary treatment by passage through a mixed filtration and adsorption bed containing activated carbon, the mixed bed being periodically regenerated by a partial wet-gas oxygenation cycle, utilizing a reflex operation in which the products of regeneration are returned to the primary treatment, and in which the final effluent may, for example, contain an average of less than 1 mg/l BOD.sub.5 and an average of less than 0.6 mg/l of suspended solids, an average of less than 0.3 mg/l phosphorous (as PO.sub.4), and with a material reduction in sludge. The invention also provides fully automatic cyclic operation and includes a novel tertiary method and structure, including regeneration thereof, as well as the chemical materials utilized and the method of use thereof. In a preferred form of the invention, the chemicals are produced as a dry homogeneous discrete material which may be readily transported and handled in dry form, and formed into an aqueous mix or slurry at time of ultimate use.
REFERENCES:
patent: 3468422 (1969-09-01), Camp
patent: 3623978 (1971-11-01), Boze et al.
patent: 3651942 (1972-03-01), Berardi
patent: 3717251 (1973-02-01), Hampton
patent: 3741390 (1973-06-01), Wallace et al.
Sharma Mahindar N.
White Eugene B.
Filters International Inc.
Wyse Thomas G.
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