• 作者： 汪禮賢
• 作者服務機構： 國立中興大學環境工程學系
• 中文摘要： 臺灣造紙廢水主要成分為短織纖維與二氧化鈦，本研究以硫酸鋁完成其三種等溫混凝實驗並以動力方程式關連其實驗數據獲得動力常數、淨化能及淨化常數，供作預測該混凝系統的設計與操作數據之需。澱粉對造紙廢水混凝效果影響甚大，可節省硫酸鋁用量77%，而能達到全量硫酸鋁混凝相同的去除率，且其沉降速率增加一倍以上，而澱粉用量僅為污物重量的0.73%。低溫混凝較高溫混凝效果佳，本研究發現，相同的去除率，倘造紙廢水溫度升降20°C，硫酸鋁用量可增減66%。本研究結果有益防污政策的推行。
• 英文摘要： As paper fines and titanium dioxide are the major ingredients of papermill effluent stream, theirflocculations were investigated. Jar test experiments were conducted by using alum as the flocculant toperform 3 isothermal flocculations. Kinetic removal constants, collipurer constants and purification en-ergies have been evaluated and correlated. As starch is also used in the paper making process, its influencewas significant on the flocculation and settling behaviour of papermill effluents. The amount of alum re-quired could be reduced by 77% by using starch making 0.73% of the total amount of solids in the paper-mill effluents and, at the same time, improving the settling velocity by more than two-fold. The effect oflower temperature flocculation is more evident than that of higher temperature. As temperature increasesby 20°C, the value of alum used increases by 66% to maintain the same degree of solids remaining suspend-ed.
• 中文關鍵字： environmental engineering; kinetics and thermodynamics; alum deduction
• 英文關鍵字： --