Tangent Company LLC

Kevin J Elliott

Lyle Edward Kirman

William C Prior

Adam Joseph Arnold

David Francis Rath

James E Bolton

Glenn Graff

A wastewater treatment system includes a biological reactor having anaerobic, anoxic, and aerobic chambers. A lift station including a pump is operatively connected to a tertiary filter downstream of the biological reactor. The lift station receives biologically treated liquid from the tertiary filter and pumps the liquid from the lift station. A filtration subsystem is operatively connected to the lift station. The filtration subsystem receives and filters the liquid pumped by the lift station. The filtration subsystem includes a preliminary filter and a salt-rejecting membrane filter having a recycle conduit operatively connected to recirculate salt-rejecting membrane filter, thereby forming a salt concentration loop between biological reactor and the salt-rejecting membrane filter. A post-filtration subsystem is operatively connected to receive salt-rejecting membrane filter permeate, and includes an adsorbent and oxidation system.

Biological wastewater treatment system containing a salt-rejecting membrane filter and recycle conduit

A wastewater recycling system includes a biological reactor having anaerobic, anoxic, and aerobic chambers. A lift station including a pump is operatively connected to the biological reactor. The lift station receives biologically treated liquid from the biological reactor and pumps the liquid from the lift station. A filtration subsystem is operatively connected to the lift station. The filtration subsystem receives and filters the liquid pumped by the lift station. The filtration subsystem includes a salt-rejecting membrane filter comprising a concentrate recirculation conduit operatively connected to recirculate salt-rejecting membrane filter concentrate to a point along the wastewater recycling system upstream of the salt-rejecting membrane filter, thereby forming a salt concentration loop between said point along the wastewater recycling system and the salt-rejecting membrane filter. A post-filtration subsystem is operatively connected to receive salt-rejecting membrane filter permeate, and comprises a water disinfection system that disinfects the permeate thereby generating potable water.

Method and apparatus for residential water recycling

Growing community of inventors

Burlington, Canada

Kevin J Elliott