工業區污水處理廠主要採用生物處理系統中的微生物來處理綜合廢（污）水，氯離子濃度太高會使微生物細胞脫水甚至使微生物細胞破裂死亡，但不同行業別所排放的廢（污）水氯離子濃度不一，造成廢（污）水處理成果不易控制。本研究探討在不同氯離子濃度廢（污）水下，彰化線西污水處理廠之生物處理系統的微生物存活特性。首先取廠內曝氣池之植種污泥，配置為化學需氧量(Chemical Oxygen Demand，簡稱 COD)濃度400mg/L，使用氯化鈉調整為不同氯離子濃度(2000、2500、3000、3500、4000、4500、5000 ppm)，採用環訓所重鉻酸鉀迴流法進行連續5天化學需氧量值檢測。發現氯離子濃度在2000 ppm情況下，對有機物質反而有較高的分解效率；當氯離子濃度大於3500 ppm時，氯離子對生物分解具有明顯抑制效果，本研究藉由COD去除率來了解在不同的氯離子濃度之廢（污）水對於本廠微生物之影響，研究成果可提供日後污水處理廠廢（污）水操作上之參考。 Industrial wastewater Treatment Plant mainly uses microorganisms in biological treatment system to deal with synthetic waste (sewage) water, chlorine ion concentration is too high can make microbial cells dehydration or even microbial cells rupture death, but different industries emissions of waste (dirty) water chloride ion concentration is not easy to control the results of waste (sewage) water treatment. In this study, the microbial viability of the biological treatment system of the plant was studied under the different chlorine ion concentration waste (sewage) water. First, the plant sludge from the aeration tank of Changhua Xianxi Sewage treatment plant was configured as the concentration 400mg/l of chemical oxygen demand (chemical Oxygen Demand, COD), and the sodium chloride was adjusted to different chlorine ion concentrations (2000, 2500, 3000, 3500, 4000, 4500, 5000 ppm), using the potassium dichromate Reflux method for 5 consecutive days of cod value detection. It was found that the concentration of chlorine ions in 2000 ppm the organic matter has a higher decomposition efficiency; When the chloride ion concentration is greater than 3500 ppm, the chloride ion has obvious inhibitory effect on the biological decomposition, and the removal rate of cod is used to understand the effect of waste water of different chlorine ion concentration on the microorganism in our factory, The research results can provide reference for the waste water operation of the sewage treatment plant in future.
