C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/12
C02F 1/72 (2006.01) C02F 3/02 (2006.01)
Patent
CA 1090925
ABSTRACT A method and apparatus for treatment of sewage and waste materials, and while applicable to larger installa- tions, is particularly desirable for relatively small, for example family and multi-family installations, utilizing high rate biochemical 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 floe, a phosphate precipitating material and a nonionic polyelectrolyte, operative to maintain pH and zeta potential favorable to flocculation, being subjected to a tertiary treatment by passage through a mixed filtration and adsorp- tion 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 aver- age of less than 1 mg/l BOD5 and an average of less than 0.6 mg/l of sudpended solids, an average of less than 0.3 mg/l phosphorous (as PO4), 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.
296676
Sharma Mahindar N.
White Eugene B.
Filters International Inc.
Smart & Biggar
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