電解法用於廢水處理

本研究旨在探討電解浮除法在廢水處理的應用，主要針對非金屬類總懸浮粒子（TSS）。首先建立電極板耗電量與極板面積、電流密度、電壓、與極板距離的量化計算公式。其次依據此公式設計處理槽內不鏽鋼電極板的配置與消耗功率的計算。實驗分別在循環式與靜置式處理槽進行。前者水深10㎝，底面積1m2，槽內配置六片長1.4m，寬1㎝，厚1㎜的電極板；後者水深33㎝，底面積0.3m2，槽內配置四片長60㎝，寬1㎝，厚1㎜的電極板，極板間距均為10㎝。以100公升的人工調製廢水實驗，結果顯示以循環式處理TSS 200-500 ppm，導電度（EC）500μS/㎝時，可以在十分鐘內達到30-40 ﹪的去除率。EC 250-750μS/㎝，TSS 500 ppm時，最高可以在十分鐘內達到56.7 ﹪的去除率，去除效果與EC呈正相關。以靜置式處理TSS 200-500 ppm，EC 750μS/㎝時，可以在十分鐘內達到40-50 ﹪的去除率。同樣處理EC 750μS/㎝，TSS 500 ppm的廢水時，靜置式在前20分鐘的浮除效果不如循環式，但60分鐘後的效果則反之。前者將TSS降至40 ppm，符合大部分工商業廢水TSS排放標準，後者只降到100 ppm，符合畜牧業廢水TSS排放標準。

關鍵字

電解；浮除；廢水處理

並列摘要

The aim of this study is to apply electrolysis in waste water treatment focusing on removal of total suspended non-metal solids(TSS). Relations among applied voltage, current, area of electrodes and distance between electrodes were quantified. Two experimental tanks including water re-circulating type and fixed batch type were set up and amount of waste water were both 100 liter. Electrodes were made from stainless steel. 6 plates of 1.4m x 1cm x 1mm and 4 plates of 60cm x 1cm x 1mm were used in the re-circulating and fixed batch tanks, respectively. The removal rate at the first 10 minutes for the waste water at 500μS/cm EC and initial TSS of 200-500 ppm in the re-circulating tank was about 30-40 %. For the waste water at 250-750μS/cm EC and initial TSS of 500 ppm, the highest removal rate at the first 10 minutes was 56.7 %. The TSS removal rates in direct relation to the EC values of the waste water. The removal rate at the first 10 minutes for the waste water at initial TSS of 200-500 ppm and 2 mS/cm EC in the fixed batch tank was 40-50 %. Compare both systems using waste water at 750μS/cm EC and initial TSS of 500 ppm, the removal rate for the fixed batch type at the first 20 minutes was less than the re-circulating type. However, the situation reverse after 1 hour of treatment. The final TSS for the fixed batch type and re-circulating type treatments were 40 and 100 ppm, respectively.