本研究以ABS 製程廢水為實驗對象，採用鋁鹽、三氯化鐵為混凝劑進行處理，實驗結果發現，兩種混凝劑對COD 去除率只有9%(鋁鹽)與16%(三氯化鐵)，可見廢水中含有大量的COD 物質無法以混凝去除。探討原廢水之COD 成份分佈，顯示廢水中能通過薄膜孔徑為10K 之成份佔總COD 之69%，足見廢水中含有大量小分子之有機物。添加粉狀活性碳實驗結果顯示，粉狀活性碳與混凝劑同時進行混凝時，COD 去除率可提升至58％~61％。粉狀活性碳對石化廢水之吸附作用符合Freundlich等溫吸附模式理論。在混凝過程中添加粉狀活性碳，可明顯提升COD 去除率，但對濁度的去除改善並不顯著，且添加之活性碳劑量越高，混凝沉降後上澄液濁度值越高。固定性固體物實驗顯示，上澄液之高濁度值乃由過剩之粉狀活性碳所造成。本研究顯示COD 的去除率與粉狀活性碳加入時間無關。當粉狀活性碳為低劑量添加時，濁度的去除率與粉狀活性碳加入時間無關，但當粉狀活性碳的添加劑量提升至25mg/L 時，粉狀活性碳越晚加入，濁度之去除效果越差。 In this study, coagulation with/no activated carbon were evaluated for the treatment of petrochemical industry wastewater. The purpose of this study is to investigate the removal of suspended solids and COD by using coagulation and activated carbon. The experimental results showed that by using polyaluminium chloride(PAC) and ferric chloride as the coagulants, the turbidity removal efficiency both are exceptionally high but only slightly efficiency in COD removal. By adding powdered activated carbon with coagulation, the COD removal is up to 58% to 61%. Besides, the powdered activated carbon for the ability of adsorption of wastewater is fitted in with Freundlich Adsorption isotherm theory. Furthermore, the result reveals that there is no difference when powdered activated carbon was added.
