电催化氧化预处理技术减轻超滤膜污染实验研究

Experimental Study on Electro-Oxidation Pretreatment to Reduce Ultrafiltration Membrane Fouling

实验探究电催化氧化预处理技术对膜污染的影响。实验通过电催化氧化工艺过程中产生的强氧化剂羟基自由基(·OH)无选择地与纤维素、腐殖质等难降解的大分子有机物反应,将其降解为小分子有机物,以此减缓膜污染。实验发现,通过使用电催化氧化工艺作为预处理方式处理二沉池出水,当电极为二氧化铅电极,电流密度为20 mA/cm^2,反应停留时间为3 h时的处理效率为最佳条件,此条件下可以有效地减轻膜污染。

The experiment explored the effects of electrocatalytic oxidation pretreatment on membrane fouling.During the electrocatalytic oxidation process,the hydroxyl radical(·OH)was generated and the macromolecular organic matters such as cellulose,humus-like which are difficult to be degraded were degraded into small molecular organic substances by hydroxyl radicals,resulting in alleviating the Membrane fouling.The experiment shows that the electro-oxidation pretreatment has a better treatment effect in reducing membrane fouling.When the electrode was PbO 2 electrode,the current density was 20 mA/m 2,and the treatment efficiency was the best when the reaction residence time was 3 h.Under these conditions,membrane fouling can be effectively alleviated.