C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/12
C02F 3/12 (2006.01) B01J 8/20 (2006.01) C02F 1/72 (2006.01) C02F 3/30 (2006.01)
Patent
CA 1064169
A B S T R A C T. A purification process for removal of suspended solids, carbonaceous material, nitrogenous material, phosphorus, refrac- tory organics, bacteria and viruses comprises of combining and carrying our the various biochemical and chemical reactions and separation of the suspended solids in a single sludge system in a simplified process sequence suitable for use in a single reac- tion tank. The biooxidation, nitrification, denitrification and chemical predipitation processes are carried out in presence of mixed mi- crobial population entrapped into fluidized nonbiodegadable sus- pended solids with portion of the fluidized suspended solids cir- culating through three reaction zones having varying concentration of disolved oxygen to maintain enviromental conditions to support growth of the microbial population and simultaneously to maintain operating conditions required to carry out the involved reactions. The fluidized suspended solids entrap the active microorganisms, colloidal matter and suspended solids present in the incoming waste water and/or generated during purification of the waste water, imp- rove the settling properties of the resulting sludge and enhance separation of suspended solids from the purified waste water. The concentration of the active microbial population in this purification process is significantly higher than that achieved by the prior art processes resulting in better performance, more effi- cient removal of pollutants and reduced treatment costs. The follo- wed chemical oxidation provides for removal of remaining impurities and killing of bacteria and viruses.
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