Systematic tertiary effluent polishing

Liquid purification or separation – Serially connected distinct treating with or without storage... – Diverse

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210201, 210202, 210203, 210252, 210254, 210263, 210295, 2103231, 2105021, 210503, 210756, 210806, 210903, 210906, 210908, 210920, C02F 100, C02F 128, C02F 126, B01D 3600

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active

054075726

ABSTRACT:
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 million 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.

REFERENCES:
patent: 3733266 (1973-05-01), Bishop et al.
patent: 4279753 (1981-07-01), Nielson et al.
patent: 5236595 (1993-08-01), Wang et al.
Yiessman, Warren et al., "Water Supply and Pollution Control, " Harper & Row Publishers, New York (1985) pp. 666-689, 712-713.

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