以Ti/RuO₂-IrO₂电极为阳极、不锈钢电极为阴极构建电化学氧化工艺,用于前置反硝化/PN/Anammox混凝后的垃圾渗滤液脱氮除碳处理的研究。采用响应曲面法的BBD法考察电流密度、极板间距、初始pH、反应时间对COD去除率的交互影响,并建立相关的数学模型,分析电化学氧化过程中总氮的转化。结果表明,各个影响因素显著,模型回归线性好,预测COD去除率最大值为89.38%。最佳实验条件为:电流密度为350 mA/cm²、极板间距为24 mm、初始pH为7.0、反应时间为3.2 h。实际测得的COD去除率为90.12%,对腐殖酸、腐殖质类物质去除效果好,总氮中的氨氮被完全去除,部分氨氮转化为硝氮。

Taking Ti/RuO₂-IrO₂ electrode as the anode and stainless steel electrode as the cathode,an electrochemical oxidation process is constructed for the denitrification and decarbonization of waste leachate after pre-denitrification/PN/Anammox coagulation.The BBD method of response surface methodology is employed to investigate the interactive effects of current density,electrode plate spacing,initial pH and reaction time on the COD removal rate.A relevant mathematical model is established to analyze the conversion of total nitrogen during the electrochemical oxidation process.The results show that each factor has significant impact,the model regression is linear,and the predicted maximum COD removal rate is 89.38%.The best experimental conditions are as follows:current density is 350 mA·cm^-2,pole plate spacing is 24 mm,initial pH is 7.0 and the reaction has performed for 3.2 h.The actual measured COD removal rate is 90.12%,and a good effect is achieved in removing humic acid and humic substances.Ammoniacal nitrogen in total nitrogen is completely removed,and part of ammoniacal nitrogen is converted into nitrates.

陶仁杰(1995-),男,硕士研究生,研究方向为废水处理与资源化利用,648758479@qq.com。