Liquid purification or separation – Processes – Treatment by living organism
Patent
1988-02-17
1990-01-30
Wyse, Tom
Liquid purification or separation
Processes
Treatment by living organism
210626, 210628, 210631, 210744, C02F 312
Patent
active
048971960
ABSTRACT:
A two-stage, batch process for purifying wastewater containing organic and adsorbable pollutants includes the steps of introducing a predetermined quantity of the wastewater into an aeration and settling zone of a primary treatment zone and aerating therein in the presence of a powered absorbent, such as activated carbon, and biologically active solids, terminating aeration and retaining the thus-treated wastewater in the aeration and settling zone a sufficient time for a substantial portion of the suspended solids to settle by gravity. A predetermined amount of the partialy-treated wastewater is withdrawn from the aeration and settling zone and introduced into a contact zone wherein it is agitated, preferably by aeration, in the presence of a powered adsorbent, agitation is terminated and the solids are allowed to settle by gravity. After completion of settling, clarified, substantially solids-free water is withdrawn from the contact zone.
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Copa William M.
Vollstedt Thomas J.
Wyse Tom
Zimpro/Passavant Inc.
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