NOVELTY - Sewage-disposal method involves separating solid-liquid contained in mixture of water and ground organic refuse, into fine organic refuse mixed-water and coarse organic refuse, decomposing-reducing coarse organic refuse with microbe-carrier in hydrated water-draining environment, and fine refuse mixed-water, separately, returning precipitated sludge to water tank and ejecting emitted supernatant.    USE - For processing sewage and organic refuse containing waste water released from home and business area. The treated water produced after processing the sewage, is ejecting into river.    ADVANTAGE - The method enables efficient purification of water contained in sewage and provides purified water of permissible grade having low BOD concentration, which can be easily released into river, comfortably without causing environmental pollution.    DETAILED DESCRIPTION - Organic refuse is ground finely with a disposer. The ground organic refuse is mixed with water and the mixture is subjected to solid-liquid separation, for separating fine organic-refuse mixed water and coarse-organic refuse (COR) mixed water. The water content in COR is adjusted by sprinkling water containing microbe-carrier and COR is decomposed, by maintaining moisture content. The water generated in the moisture retaining decomposition process is collected. The fine refuse water is separated in aeration treatment tank and microbially decomposed in the treatment tank. Precipitated sludge is removed from the microbially treated water and the supernatant sludges is purified. Sludge is returned to the treatment tank and the supernatant is ejected externally. An INDEPENDENT CLAIM is included for a sewage disposal system for implementing the sewage disposal method. The system comprises a disposer (1) for grinding organic refuse, liquid feed pipe (2) for supplying liquid to the disposer, water-supplying tap (10) for supplying water to the ground refuse and solid-liquid separator (3) for separating fine organic refuse mixed-water and coarse organic refuse mixed-water. The coarse organic refuse is stirred in the decomposition tank and the content is reduced by decomposition, in the presence of moisture. The moisture content is adjusted by water-sprinkling unit (22) together with microbe-carrier (4) in a water-draining hydration environment. The water generated in the moisture-retaining stirring decomposition tank (5) and water generated from fine refuse- water, are supplied to the aeration treatment tank (7) to microbially decompose and treat via aqueduct (23) and aqueduct (6), respectively. The treated water, released from aeration treatment-tank is separated into supernatant and precipitated sludge in the precipitate separation-tank (8). The precipitated sludge is separated and returned to the aeration-treatment tank (7) via liquid feed-pipe (17). The supernatant is emitted through waste-water-port (9).    DESCRIPTION OF DRAWING(S) - The figure shows the outline of sewage disposal system.    Disposer (1)    Liquid feed pipe (2)    Solid-liquid separator (3)    Microbial carrier (4)    Decomposition tank (5)    Aqueduct (6,23)    Aeration treatment tank (7)    Precipitate separation-tank (8)    Water-supplying tap (10)    Cytoclasis apparatus (16)    Liquid feed-pipe (17)    Water-sprinkling unit (22)    Aeration pipe (24)