Patent ID: 7972500

Claim:
A wastewater purifying apparatus comprising: a wastewater treatment tank including a plurality of treatment chambers for stepwise purifying wastewater, said plurality of treatment chambers including an upstream most treatment chamber with an opening in an upper portion thereof, at least one intermediate treatment chamber downstream of the upstream most treatment chamber, a downstream most treatment chamber and a purified wastewater storage chamber for storing purified wastewater derived from the downstream most treatment chamber at a most downstream position of the plurality of treatment chambers, the opening in the upper portion of the upstream most treatment chamber permitting wastewater from the upstream most treatment chamber to be drained therethrough by wastewater suction means; a purified wastewater storage container provided independently of the wastewater treatment tank for storing purified wastewater derived from the purified wastewater storage chamber; reflux means for refluxing treated wastewater from the at least one intermediate treatment chamber and the downstream most treatment chamber into the upstream most treatment chamber as the wastewater is being drained from the upstream most treatment chamber by the wastewater suction means, the reflux means formed in a lower part on a wall of the wastewater treatment tank; and purified wastewater supply means for supplying the purified wastewater stored in the purified wastewater storage container through the opening and into the upstream most treatment chamber as washing water.