Patent ID: 8187461
Filing Date: 2012-05-29
Classification: C02F,Y02A,Y02W

Abstract:
1. A system for processing and repeatedly recycling graywater for reuse in a domestic site, comprising: a) a source of graywater; b) at least two vertical flow wetland units, each of said at least two vertical flow wetland units comprising a container filled with at least one granular substrate and at least one species of a hygrophilous plant, and an outlet means; c) a first conduit means extending from said graywater source to a location on top of an uppermost layer of each of said at least two wetland units, for delivering the graywater to said at least two wetland units without risk of first conduit blockage caused by elongated roots; d) a sink for receiving purified graywater discharged from the outlet means of each of said at least two wetland units; e) a second conduit means extending from said sink to each of said at least two wetland units; f) a recirculation pump for delivering purified graywater through said second conduit means; g) an isolating means, for isolating a first wetland unit from said first and second conduit means while allowing the graywater and purified graywater to be introduced into a second wetland unit after flowing through said first and second conduit means, respectively, and for subsequently isolating said second wetland unit from said first and second conduit means after a predetermined period of time while allowing the graywater and purified graywater to be introduced into a selected active wetland unit after flowing through said first and second conduit means; h) a means for controlling an activity duration of said selected wetland unit; i) an interface unit for discharging the purified graywater from said sink to a garden for reuse; j) a supplementary wetland unit; k) a supplementary sink for receiving purified graywater from said supplementary wetland unit and from a diverting line extending from said second conduit means and downstream from said recirculation pump; l) an additional line extending from said supplementary sink to said supplementary wetland unit; m) an additional pump for delivering purified graywater from said supplementary sink to said supplementary wetland unit via said additional line; n) a discharge line extending from said supplementary sink to a toilet tank, through which additionally purified graywater flows; and o) a discharge pump operatively associated with said discharge line for delivering said additionally purified graywater to said toilet tank for reuse.