CAST Process Debugging And Running Technology Study In Wastewater Treatment Plant

Along with the constant development of China's economy and environmental awareness enhance,The problem of water pollution, improve water environment is imperative.According to《Haihe River Basin Water Pollution Control Program in Shanxi Province》requirements, The urgent need to develop sources of pollution control and water quality protection plan established Wastewater Treatment Plants in Shuozhou City, Wastewater Treatment Plants Accept City sewage in Shuozhou City, Control Water Pollution and improve the water environment,Protect the people's survival and water.According to the actual situation of Shuozhou City, Determined the size of the project 40,000 m³ /d about Wastewater Treatment Plant and elected CAST as the process works, CAST is a relatively new technology with nitrogen and phosphorus removal capabilities of the sewage treatment process. Because of its small footprint, no primary settling tank and two Shen Chi, low operating costs, convenient operation and management and many other advantages. The CAST Process has been an increasing number of applications in recent years in china, it has broad market prospects.Shuozhou City sewage treatment plant commissioning training run early activated sludge process, the sludge since the beginning of the activity is not high, indicators, SV, SVI, MLVSS low that relatively poor activity of sludge, water indicators COD, BOD, SS, such as the removal better, but the ammonia nitrogen removal rate low, after the operation cycle of CAST adjust the sludge at the same time pay attention to the age and DO control, according to test data to make timely adjustments to the process, making sewage Ammonia water treatment plant effluent standards, other indicators of water with the design standard.This study is in Shuozhou City's Sewage Treatment Plant, According to the design parameters and influent water quality, the study carried on the debugging movement research work and selected a reasonable operating parameters. The study achieved environmental management and improved the living quality of purpose. After seven months of debugging running experiments, the author determined appropriate for the operating parameters: Entering the water 90 minutes, aeration 120 minutes, precipitation 60 minutes, decanter 40 minutes, idle 20 minutes; MLSS control in the 3000 to 5000 mg/L; At the end of the aeration control of dissolved oxygen in the aeration tank 2 to 3 mg/L, controlled Sludge age in 20 days. In this cycle of operation BOD₅, COD, SS, ammonia, and other indicators of water achieved《Sewage Discharge Standards》in standard.The results complied with design requirements.