domestic discharges treatment system and method

摘要

PCT No. PCT/IL98/00147 Sec. 371 Date Sep. 15, 1999 Sec. 102(e) Date Sep. 15, 1999 PCT Filed Mar. 29, 1998 PCT Pub. No. WO98/43918 PCT Pub. Date Oct. 8, 1998The invention provides a system 10 for treatment and purification of domestic household effluent, and for the elimination within said system of organic solid wastes, comprising elements 12 and 14 for separately collecting first and second constituents of the sewage of a domestic residential unit, lavatory sewage comprising said first sewage constituent, and bath, shower, wash basin, laundry, kitchen sink sewage and the like comprising said second sewage constituent, a first and a second dual-purpose vessel 22 and 24, each vessel having at least one inlet port 18 and 20 and at least one outlet port 26, 28, 30, 32 and being arranged so that during the time period that one of said vessels 22 receives said first sewage constituent and acts as a collector and settling tank, the remaining vessel 24 operates as an anaerobic reaction vessel, the vessel operating as an anaerobic reaction vessel carrying out a decomposition process during which the volume of sludge 34 contained therein is greatly reduced by conversion to compost and gas, a gas outlet 30, 32 being provided at the top of each of said vessels for the collection thereof, first valve means 16 for directing said first sewage constituent to whichever dual-purpose vessel 22, 24 is currently used as a collector and settling tank and for isolating the remaining dual-purpose vessel to convert the same to operate as an anaerobic reaction vessel, at least one aerobic reaction vessel 40 connected to receive an aqueous slurry containing floating organic solids from said collector and settling tank 22, at least one aerator 42 connected to said aerobic reaction vessel 40 for oxygenating said slurry, first pumping means 44, powered at least in part by gas generated in said anaerobic reaction vessel 24, for repeatedly driving said slurry from said aerobic reaction vessel 40 through said aerator 42.