台灣北部生活污水處理廠進流水水質調查

本研究針對迪化污水處理廠、桃園北區水資源回收中心、淡水水資源回收中心及北大特區礫間淨化場調查該區域的污水下水道之水質，透過不同污水處理廠進流水分析各生活型態區域的收集系統來探討其水質特性，並藉由不同季節採樣分析生活污水在各季節氣候之變化，且利用連續四十八小時由周間採樣至周末，來探討周間及周末的水質變化，了解該區域水質變化狀況，分析各廠BOD、COD、SS、NH3-N、TN、PO4-P及TP變化情形，探討不同季節與不同時段對於進流水質變化之影響。經研究發現，周間與周末的水質變化除桃園北區假日15時左右COD、BOD與SS濃度較高外，其他污水下水道系統及水質項目周間與周末水質變化較不明顯；各季節水質變化也無較明顯差異。淡水污水下水道系統接管率達96.5%，且系統涵蓋了高、低密度住宅區、學區、商業區等較完整的都市社會結構，其水質COD：312.4 mg/L、BOD：108.5 mg/L 、SS：145.7 mg/L、PO4-P：2.78 mg/L、TP：4.20 mg/L、NH3-N：27.7 mg/L、TN：34.8 mg/L具我國北部區域都市污水水質代表性。且本研究對象四個廠設計水質皆為BOD：180 mg/L 、SS：180 mg/L，而我國污水廠設計多為如此，比較本研究實測各廠水質發現，各污水處理廠進流水生化需氧量及懸浮固體物濃度與污染量設計皆有過高情況，與實際濃度有落差。

關鍵字

生活污水；進流水

並列摘要

This study includes the sewerage systems of Dihua Sewage Treatment Plant, Taoyuan North Water Recycling Center, Danshui Water Recycling Center, and Beida Special Zone Gravel Water Treatment Plant as the subjects in examining the quality of the sewage in these areas. By collecting the influent water from these sewage treatment plants, this study analyzes and discusses the characteristics of the water quality in different sewage collecting systems in areas with different lifestyles. In addition, this study not only collected sanitary sewage in different seasons, but also conducted a 48-hour successive sewage sampling from weekdays to weekends to analyze the variations of the BOD, COD, SS, NH3-N, TN, PO4-P and TP of the sewage from different sewage treatment plants in order to discuss the influence of different seasons and different times on the quality variation of the influent water. The results indicate insignificant quality variations of the sewage from most of the sewage treatment plants between weekdays and weekends, except for higher COD, BOD and SS concentration of the sewage of Taoyuan North Water Recycling Center at 15:00 on holidays. In addition, there are no significant seasonal differences regarding the quality variations of the sewage from the sewage treatment plants. The sewage pipe connection rate in Danshui District has reached 96.5%, covering most of the urban area, including high and low density residential areas, school districts, commercial districts, etc. The statistics related to the sewage quality in Danshui are listed as follows: COD: 312.4 mg/L, BOD: 108.5 mg/L, SS: 145.7 mg/L, PO4-P: 2.78 mg/L, TP: 4.20 mg/L, NH3-N: 27.7 mg/L and TN: 34.8 mg/L. The above conditions qualify Danshui District as the representative area with regard the sewage quality in Northern Taiwan. This study shows that all the BOD and SS of the sewage in the four sewage treatment plants are 180 mg/L, which matches those of most sewage treatment plants in Taiwan. In addition, by comparing the quality of the collected sewage in the four sewage treatment plants, this study discovers that the regulated BOD and SS concentration and pollutant amount standard values in these sewage treatment are higher than the actual values measured.