하수차집관로 유량제어시스템 적정 관리방안 연구

Abstract

The need for urban sewerage has increased recently due to the expansion of urban areas caused by population, urbanization, indiscriminate evelopment and increase of water pollution. Even though each municipality has put a lot of efforts and budget into the treatment of existing urban sewage, it has not been able to build a perfect sewer system because of the complicated urban network and the complexity of the sewer structure as a result of the development thoughtless for the environment. Especially, when it rains, water pollution in the receiving waters still remains a problem on account of not performing a perfect sewer treatment. In particular, since the supply of sewage facilities is still in progress, the sewage disposal facility maintains its function even in the classified areas which are the water pollution in the receiving waters from the sewage overflow due to the sewage water collection facility. In addition, there is a close relationship with the residents' lives, which causes many side effects by the degradation of the living environment of the local residents. Furthermore, the low concentration sewage flowing into the sewage treatment plant has various problems in the water treatment process. Uncontrolled sewage influences the main sewage pipe causing serious system problems such as sewage reflux. Objective of this research is to solve a fundamental problem of urban pollution by studying optimal operation of existing urban sewerage system. It make to minimize pollution in the receiving waters and optimizing sewer and sewage treatment plant operation. First, SWMM data was collected through sewage treatment plant, sewage network and watershed survey. And problems of unsteady operation of wastewater treatment plant were ascertained through the overflow of the submergence facility in rainfall. The repair and water quality effects were simulated. As a result of simulation, it was confirmed that the sewage amount flowing into the sewage treatment plant at the current sewage treatment plant was not operated normally. Due to the exceeding operation water level of the influent pump. In addition, A tendency of the influence of the flow control device in the maintenance of the sewer main channel and the inflow pumping station due to the failrue of the flow control device in each position was analyzed. And countermeasures were also suggested. The problems and their countermeasures on the influence of rainfall intensity in the future maintenance were suggested. Based on the hydraulic and water quality results simulated by the SWMM, the effects on the wastewater treatment plant were simulated by Aquasim. As a result, the effect on the sewage treatment plant was analyzed under the current operating conditions. Water quality characteristics of the future interception facility were implemented to ensure more stable operation. Since most of the sewage treatment plants in Korea are affected by the unknown water at the time of rainfall, the influence of the sewerage system, the influent pump station and the treatment water are seriously affected by the influence of rain water. It was deemed necessary to propose a direct alternative plan for the operation of sewage treatment plants in the future by continuously presenting the operation plans for the interception facilities and rainwater discharge causing the problems.