Fe^0/Na_2S_2O_8体系处理农村生活污水相关参数优化及水质特性分析

Optimization of Fe^0/Na_2S_2O_8 system for treatment of rural domestic sewage and analysis of water quality characteristics

采用Fe^0催化活化Na_2S_2O_8生成SO4-·处理农村生活污水,研究了Fe^0/Na_2S_2O_8体系对生活污水的处理效果,系统考察了氧化体系初始p H值、Na_2S_2O_8、催化剂Fe^0的投加量以及反应温度对氧化效果的影响。结果表明,Fe^0/Na_2S_2O_8体系能有效的降解农村生活污水中的COD值与氨氮指标,当水体p H为中性、氧化剂投加量为2.5 g/L、温度为45℃时、催化剂Fe^0投加量0.5 g/L的条件下,COD与氨氮的去除率分别为78%与56%。同时对处理前后农村生活污水进行紫外光谱扫描,结果发现经过Fe^0/Na_2S_2O_8体系处理后的农村生活污水中的分子量大的腐殖质物质被降解为分子量小的富里酸,同样污水有机污染程度大幅下降。

Using Fe0 catalysis to activate Na2S2O8 and generate SO4-· to dispose of the rural sewage,we study the domestic sewage treatment efficiency of Fe0/Na2S2O8 system,and systematically examine the initial p H value,dosage of oxidant,catalyst dosage of oxidation system and the effect of reaction temperature on the oxidation effect.The results show that Fe0/Na2S2O8 system can reduce COD and ammonia nitrogen index in sewage treatment.When pH=7,Na2S2O8 dosage is 2.5 g/L,temperature is 45℃,and Fe0 dosage of 0.05 g/L,COD and ammonia Nitrogen removal rates were 78% and 56%,respectively.By UV scanning the rural sewage,we found that the large molecules in water samples treated in a large number of humic substances were decomposed into small molecules of fulvic acid in water samples,and the organic pollution degree was greatly decreased.