Method and Apparatus for Residential Water Recycling

摘要

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.

主权项

1. A wastewater recycling system, comprising:
a) a biological reactor, the biological reactor comprising an anaerobic chamber, an anoxic chamber, and an aerobic chamber; b) a lift station comprising a pump, wherein the lift station is operatively connected to the biological reactor to receive biologically treated liquid from the biological reactor and pump the biologically treated liquid from the lift station; c) a filtration subsystem, operatively connected to the lift station, that receives and filters the biologically treated liquid pumped by the lift station, the filtration subsystem comprising:
i) 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; and d) a post-filtration subsystem operatively connected to receive salt-rejecting membrane filter permeate, wherein the post-filtration subsystem comprises a water disinfection system that disinfects the salt-rejecting membrane filter permeate thereby generating potable water.