Liquid purification or separation – Processes – Treatment by living organism
Patent
1988-01-04
1989-03-07
Wyse, Tom
Liquid purification or separation
Processes
Treatment by living organism
210626, 210628, 210631, 210744, C02F 312
Patent
active
048103861
ABSTRACT:
A two-stage process for purifying wastewater containing organic and adsorbable pollutants includes the steps of first aerating the wastewater in the presence of a powdered adsorbent, such as activated carbon, and biologically active solids in the aeration zone of a primary treatment zone which also includes a quiescent zone. The thus-treated water passes from the aeration zone to the quiescent zone where it is retained a sufficient time for a substantial portion of the suspended solids to settle by gravity. The partially-treated wastewater overflowing from the quiescent zone is introduced into one or more contact zones wherein it is agitated, preferably by aeration, in the presence of a powdered adsorbent, agitation is terminated and the solids are allowed to settle by gravity and, after completion of settling, clarified, substantially solids-free water is withdrawn from each contact zone.
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Copa William M.
Vollstedt Thomas J.
Wyse Tom
Zimpro/Passavant Inc.
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