Secondary filtering and discharging of wastewater

Details Secondary filtering and discharging of wastewater Secondary filtering and discharging of wastewater

2011-07-12

2011-07-12

Upton, Christopher (Department: 1776)

Liquid purification or separation

Processes

Separating

C210S806000, C210S299000, C210S532200

Reexamination Certificate

active

07976713

ABSTRACT:
Treating wastewater by receiving wastewater having a reduced concentration of waste solids into a secondary containment space and allowing the waste solids to distribute into a lower horizontal sludge layer, an upper horizontal scum layer, and a relatively clear horizontal layer of liquid therebetween; flowing the liquid from the relatively clear layer through at least one filter element enclosed in a housing the top of which is submerged below the wastewater level of the secondary containment space; and thereafter flowing the filtered effluent out of the housing. In some embodiments, the filtered effluent may be discharged from the secondary containment space using an effluent pump configured with a conventional flow inducer or, alternatively, using an effluent pump sealably configured with a shortened flow inducer thereby allowing discharge of the filtered effluent to a wastewater level below that of the pump's intake.

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