SEWAGE TREATMENT SYSTEM BY USING ARTIFICIAL MARSH

摘要

PURPOSE: A system for treating waste water by using subsurface flow of an artificial march is provided which has an effect on the removal of phosphorous and nitrogen and low cost of maintenance. CONSTITUTION: The system comprises a flow control tank(10) surrounded by a wall with an adequate height on the four sides; a processing tank(20) with one or more steps for providing a marsh prepared by planting a perennial marshy plant(29) on the surface of the base(28) constructed by mixing each unit cell(26) with gravel and slag, constituted the unit cell(26) of water tank partitioned separately by building a division wall(24) at regular intervals in parallel in its inside; the 1st aeration tank(51) connected to the front part of the 1st step processing tank(21) and arranged several air suppliers(43) at the bottom for supplying air from a separate air supply pump(40); the 2nd aeration tank(53) connected to the connecting pipe(63,65) placed under each step processing tank(21)(22) and arranged several air suppliers(45) at the bottom for supplying air from a separate air supply pump(40); an effluent tank(66); a storage pump(12); and a raw water distributor(18). In the system, raw water in the flow control tank(10) is supplied to the 1st aeration tank(51) through the raw water distributor(18) by using the storage pump(12) and purified by passing through the processing tank and one or more steps and the 2nd aeration tank(53) repeatedly.