C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 9/00 (2006.01) C02F 1/28 (2006.01) C02F 1/58 (2006.01) C02F 1/42 (2006.01) C02F 1/76 (2006.01)
Patent
CA 2113155
ABSTRACT OF THE DISCLOSURE A tertiary treatment unit is provided that has a first filtration unit operatively connected to an influent for filtering solids therefrom to form an effluent, a second filtration unit operatively connected to the first filtration unit to receive the effluent and to filter finer solids and bacteria and viruses from the effluent, a supply tank operatively connected to the effluent to provide chemicals that are mixed into the effluent, and a reactor that receives the effluent and removes nitrogen and some phosphorous therefrom to form a treated effluent. The treatment unit further has a first adsorption unit that receives the treated effluent and adsorbs additional nitrogen, BOD, TSS and certain chemicals from the treated effluent, and a second adsorption unit that receives the partially adsorbed treated effluent from the first adsorption unit and adsorbs additional phosphorous from the treated effluent to form the final effluent. The final effluent may reduce undesirables to about 2 and about 3 parts per million biochemical oxygen demand (BOD), about 0.1 parts per millions total suspended solids (TSS), between about zero and about one part per million of nitrogen, and between about zero and about one-half of one part per million of phosphorous.
Lirong Li
Mcguire John P.
Gowling Lafleur Henderson Llp
Step Three Inc.
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