Municipal Wastewater Treatment and River Water Quality Management in Taiwan

• Main Authors: Chao-Hsun Lou, 樓晁瑄
• Other Authors: Yu-Chun Wang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22105CYCU5404024%22.&searchmode=basic

碩士 === 中原大學 === 環境工程學系 === 105 === This study aims to evaluate the effects of weather condition and operation conditions and units of wastewater treatment plant (WWTP) on water qualities of effluent discharge and river using the monthly recordings of weather measurements from Central Weather Bureau, water quality data and operation conditions for 65 WWTPs from Construction and Planning Agency Ministry of the Interior, and water quality data of 356 water quality monitoring stations from Environmental Protection Administration from 2009 to 2016 in Taiwan. Information of water quality in WWTPs include E.Coli, chemical oxygen demands (COD) , water temperature, biochemical oxygen demands (BOD) , discharge volume, nitrogen-ammonia (NH3-N) , nitrate nitrogen (NO3-N) , pH, total nitrogen (TN) , total phosphorus (TP) , and suspended solid (SS) . Information of water quality in discharge river/stream include E.Coli, COD, water temperature, BOD, nitrate nitrogen (NO2) , river pollution index (RPI) , air temperature, NH3-N, Chloride, NO3-N, dissolved oxygen (DO) , dissolved oxygen saturation, pH, electrical conductivity (EC) , turbidity, total organic carbon (TOC) , total kjeldahl nitrogen (TKN) , TN, TP, SS, chromium6+ (Cr6+) , mercury (Mg) , Arsenic (As) , selenium (Se) , lead (Pb) , chromium (Cr) , silver (Ag) , copper (Cu) , zinc (Zn) , manganese (Mn) , cadmium (Cd) . Statistical analyses include descriptive statics, correlation analysis, cluster analysis, and generalized linear model. Cluster analyses divided 17 river systems into 4 groups, including severe polluted rivers, rivers with good water quality, river with moderate water quality (high SS and conductivity) , and river with moderate water quality (lowest conductivity) . In addition, 44 WWTPs were divided into 7 groups, including 1. High cost and low treatment efficiency; 2. High cost and wastewater volume higher than 100,000 CMD/day; 3. Wastewater volume lower than 5,000 CMD/day and low concentrations of nitrogen and phosphorus; 4. High removal efficiency of BOD, COD, and SS, and high concentrations of nitrogen and phosphorus; 5. Low volume (<1,000 CMD/day) and low cost; 6. Low volume (<10,000 CMD/day) and low concentrations of nitrogen and phosphorus; and 7. Wastewater volume higher than 10,000 CMD/day and high sludge production. This study suggests that WWTPs operations and treatment efficiency can be improved thought controlling the concentrations of pH, E.Coli, and NH3-N of influent, the river pollution can be reduced by decreasing concentrations of E.Coli, total nitrogen, and total phosphorus of effluent, moreover, river pollution index will decrease with decreasing pH, NH3-N, conductivity, dissolved oxygen.