目前台灣主要產業以光電產業和石化工業為主，這些產業排放出的廢水中含有大量氨氮物質，除了造成河川優養化之外，長期飲用含超過0.1 mg/L氨氮的水源可能會誘發癌症，因此，政府制訂更嚴格的氨氮排放量標準(20 mg/L)，相關產業亟需更有效率之處理技術。
利用電化學氧化法處理氨氮是目前最有效方法之一，主要利用氧化還原程序，使反應過程中不會造成二次污染。本實驗在反應槽內加入氯化鈉產生次氯酸，其經過連續反應將水中的氨氮轉化為氮氣，以循環幫浦將水體導入電解槽，再以氫氧化鈉搭配自動滴定控制pH，分析各反應參數以找出適合的操作模式。
在調控酸鹼實驗顯示，在鹼性環境中可抑制三氯胺的生成而有較佳去除效率。氯化鈉添加量亦會影響去除效果，以添加1.3 wt %氯化鈉可產生最多次氯酸氧化劑。系統內液體流速會影響質傳與表面反應速率，以30 L/h為本系統最佳參數。增加電流可提高去除效率，但會降低產生次氯酸之選擇性而導致能耗增加。進一步以氨水取代氫氧化鈉來控制pH值證實達成連續式進料反應的可行性，最後利用曝氣的方式將溶液中的氨氣吹脫至反應槽內進行處理，可達成在高濃度下進行高效率處理含氨氮的廢水，建立氣提塔與電解氧化系統串聯之實用化操作程序。

Taiwan's major industries are mainly optoelectronics and petrochemical industries in the present time. Ammonia is one of the pollutants in the waste water from these factories, resulting in the eutrophication of a body of water. It is also considered as factor to induce cancer. Therefore, the government has already developed stricter laws for ammonia-nitrogen emission standard (20 mg/L). The development of effective treatment process for ammonia in water is necessary for the related industries.
Electro-oxidation process is one of the potential ways for treatment of ammonia, which can avoid the generation of secondary contamination. In this work, the hypochlorous acid was prepared from sodium chloride via electrolytic reaction. The ammonia will be converted to nitrogen gas after series reactions. The reaction liquid was conducted into the electrolytic cell by a pump and the pH value of water was controlled by adding sodium hydroxide solution intermittently. The effects of reaction parameters on NH3-degradation rate were investigated to obtain the proper operation parameters.
The NH3-degradation rate under alkaline condition was higher than that of acid condition due to the reduction in generation of nitrogen trichloride. The largest concentration of hypochlorous acid was obtained at 1.3 wt% of sodium chloride, resulting in the rapid removal rate for NH3. The mass-transfer and surface-reaction rate were affected by the liquid flow rate where 30 L/min was the optimal rate in this system. The NH3-degradation rate was increased with the increase in current, but the energy consumption would be increased, resulted from the decrease in selectivity for hypochlorous acid. The ammonia solution was further used to replace sodium hydroxide solution, which confirm the feasibility of continuous operation. Finally, the ammonia gas was stripped from liquid phase into the reaction tank. This operation strategy can achieve the effective degradation rate under high ammonia-concentration condition. A serial operating system of strip column and electro-oxidation cell was developed successfully.

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