The effect of the optimal combination of anion and cation exchange fibers, the sample water speed and the packing density of fibers on removal of the main pollutants NH3-N and COD in leachate, as well as fiber regeneration mode and performance have been studied when anion and cation exchange fibers were used to treat landfill leachate. The results showed that the combination of"anion fiber first and then cation fiber"had the best effect in advanced treatment of landfill leachate.When sample water speed was 2.0 m L/min and fiber packing density was 0.25 g/cm3, after dynamic treatment of the leachate, residual concentrations of NH3-N and COD were 18.9, 61.1 mg/L respectively, which met the requirements of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB 16889—2008); the fibers had good performance after static regeneration and could be used repeatedly; after 10 times of static regeneration and recycling, the adsorption capacity of anion fiber to COD was over 94％ of its initial adsorption capacity and its equilibrium exchange capacity to COD was over 17.6 mg/g, while the adsorption capacity for cation fiber to NH3-N was over 93％ and its exchange capacity to NH3-N was over 13.6 mg/g. This technology had better treatment effect on landfill leachate and provided a new feasible reference scheme for application of advanced treatment of landfill leachate.%采用阴阳离子交换纤维对垃圾渗滤液进行深度处理,研究了阴阳离子纤维的最佳组合方式、水样流速和纤维装填密度对渗滤液中主要污染物NH3-N和COD去除效果的影响,以及纤维的再生方式和再生性能.结果表明:离子交换纤维采用"先阴后阳"的组合工艺对垃圾渗滤液的深度处理效果最佳;在水样流速为2.0 mL/min、装填密度为0.25 g/cm3的条件下,动态处理渗滤液后,出水的ρ(NH3-N)和ρ(COD)分别为18.9,61.1 mg/L,均达到GB 16889—2008《生活垃圾填埋场污染控制标准》要求;纤维静态再生后性能优良,可反复使用多次;经10次静态再生、循环使用后,阴离子纤维对COD的吸附能力可恢复至初始值的94％以上,平衡交换量>17.6 mg/g,阳离子纤维对NH3-N的吸附能力达到初始能力的93％以上,平衡交换量>13.6 mg/g.该技术对垃圾渗滤液有较好的处理效果,为垃圾渗滤液的深度处理工程应用提供了参考.
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