电化学氧化预处理垃圾渗滤液的实验研究

Studies on the Treatment of Landfill Leachate by Electrochemical Oxidizing

随着工业和城市的发展,难生物降解的有机物种类与数量日益增加,电催化氧化技术由于其对有机物具有特殊的降解机理和能力,被水处理界寄予厚望。本研究利用电化学氧化技术,以气体扩散电极为阴极,不锈钢板为阳极,向电解槽中通入空气,改变反应条件,对垃圾渗滤液进行了降解研究。最佳工艺条件为:电流密度=30mA.cm-2、电极距d=2 cm、pH=3.5、[C l-]=6000 mg.L-1、投加的FeSO4.H2O=0.80 g,在此条件下废水CODcr去除率达75.62%。

As the industry and urban development, the category and quantity of hard biodegradatlon organic substance increase day by day. Electric catalusis technique has been given great expectation by water treatment realm, for it has special mechanism and capability to degrade organic substance. Landfill leaehate is electrolyzed by using gas diffusion electrode as cathode and stainless steel as anode. Air is introduced into the electrolytic cell to produce Fenton reagent. The results showed that at the optimum conditions with 40 mA · cm^-2 of current density, 2 cm of electrode spacing, pH values of 3.5, 6 000 mg· L^ -1 of [ Cl^ - ] concentration and 0. 80 g of FeSO4. H2O input quantity. In the optimal conditions,the removal rates of CODCr is 75.62% respectively.