电化学法处理微污染河水的中试

Pilot-scale Study on Electrochemical Method for Micro-polluted River Water Treatment

采用电化学法处理微污染温榆河水,研究了电化学法对水体中主要污染物的去除效果,同时考察了水体中氯离子浓度及槽电压的变化对处理效果的影响。结果表明:电化学法对COD、NH3-N、TN都有一定的去除效果;向水体中投加的NaCl溶液的浓度越高,则系统对各种污染物的去除率越高;随着槽电压的增加,对各种污染物的去除率也随之提高。但投加的氯离子浓度和槽电压的增加都有一定的限度,这样才能保证系统对污染物的去除率,综合考虑电耗等因素,确定中试的最佳运行条件:电解时间为20 min;槽电压为7 V;投加NaCl溶液的浓度为5.0 mol/L,其投加率为2 L/h。

The electrochemical method was used to treat micro-polluted water from Wenyu River. The removal efficiency of main pollutants by this method was studied, and the influence of variations in chlorine ion concentration and bath voltage on the treatment efficiency was investigated. The results indicate that the electrochemical method can partly remove COD, NH3 - N and TN. The higher the concentration of NaCl solution added into the water body is, the higher the removal rates of pollutants are. The removal rates of pollutants are increased with the increase of bath voltage. But the addition concentration of chlorine ion and the increase of bath voltage both have their limitation, in this way, the removal rates of pollutants can be guaranteed. Considering the power consumption comprehensively, it is determined that the optimal running conditions of this experiment are as follows ： the electrolysis time is 20 min ; the bath voltage is 7 V ; the addition concentration of NaCl solution is 5.0 mol/L, and its dosage is 2 L/h.