活性炭填充三维电极电解法处理氨氮废水研究

针对传统城市污水处理厂冬天出水存在氨氮浓度偏高的问题,采用间歇试验法对活性炭填充三维电极深度去除污水中的氨氮进行了研究。考察了氨氮初始浓度,电流密度,氯离子浓度,p H值等因素对氨氮去除效果的影响。结果表明:氨氮去除速率随着电流密度和氯离子浓度增加而增加,单位氨氮去除能耗随着电流增加而增加,随着氯离子浓度增加而减少。p H值在3.0~9.0范围内对三维电极除氨氮过程影响比较小。实际废水在经过2.5h电解后,氨氮浓度从28.0 mg/L下降至0.3 mg/L,去除率高达99%,可以满足国家污水排放标准一级A要求。

Study on electrolytic removal of ammonia nitrogen wastewater by using activated carbon packed 3D electrode

In the light of the problem of ammonia and hydrogen concentration being high in effluent of wastewater treatment plant during winter, the paper researched the electrolytic removal of ammonia and hydrogen by using activated carbon packed three dimensional electrolysis reactor in batch mode. The influence of initial ammonia and hydrogen concentration, current density, chloride concentration and pH on removal effect were studied under various conditions.The results showed that the removal rate of ammonia hydrogen enhances with the increase of current density and chloride concentration. Moreover, the energy consumption per unit enhances with the increases of current but decreases with the increase of chloride concentration. pH within the range of 3.0~9.0 has little effect on ammonia and hydrogen removal. The treatment of actual wastewater showed that 28.0 mg/L ammonia can be reduced to 0.3 mg/L after the treatment of 2.5 h.The removal rate reached 99%, which can meet the First Grade A discharge standard of municipal wastewater.