近年來，廢汙水中氨氮濃度已經引起全球的關注。目前已有多種技術被普遍用來去除廢汙水中氨氮。本研究使用實驗室自行配製氨氮溶液，以電透析試驗，探討對氨氮之去除效能及pH值之影響。實驗結果顯示，藉由調整不同pH對水中氨氮去除之影響有明顯去除效果。pH值為7以上時，有較佳的去除表現，當pH值低於7以下去除效率較無明顯之效果。電透析可在30分鐘就可對水中氨氮達到去除效果，當流速越快去除效果越差，反之流速越慢去除效果越好，故流速與去除率成反比，而流速在3L/min去除率最好。在不同起始氨氮濃度中，濃度為1600ppm其去除率為72%，濃度為800ppm之去除率為70%。此外，倒極後第30分鐘，水中氨氮及導電度之產水濃度會上升，使產水之品質下降，但在第50分鐘慢慢隨之穩定，各去除率與導電度成正比關係。藉由倒極試驗在3L/min之條件，得知最佳pH為8，對產水去除效率可達72%。 In recent years, the ammonium in waste effluentconcentrationhas attractedglobal attention. In present,various techniques have commonlyused to removeammoniumor nitrogen from wastewater. In this study, the small scale electric dialysis (ED) equipment has established in the application of ammonium removal by using self-prepared ammonium solution. Some control facts that affect the removal efficiency were carefully examined in this laboratory simulation, including and pH, concentration and flow rate.Experimental results indicated thatadjusting pH could affect significantly the removal efficiency of ammonium chloride. The pH values equal to 7or higher illustrated betterremovalperformance. While the pH is belowthan 7, the followingremovalefficiency decreased clearly.In 30 minutes, the electricdialysis could reachthe obvious removalof ammonium.The removaleffect was decreased while the flow rate increased, whereas the slowerflow rate illustrated better removal efficiency. The best result was achieved at low rate at 3L/min. Moreover, at various initialammonium concentrations, the best removal efficiency of 1600ppmsolutionwas72%, while thebest removal efficiency of 800 ppm solutionwas 70.In the experiment of electric dialysis reversal (EDR), the treatment efficiency decreased at first 30 minutes,and slowly came back after 50 minutes. The conductivityfollowed the direct proportional totheremoval efficiency. The best condition was achievedup to72% removal efficiency at EDR experiment under the flow rate = 3 L/min, and pH = 8.
