吹脱法去除垃圾渗滤液中氨氮

摘要

The paper aims to solve the harmful effects of high quality concentration ammonia nitrogen of landfill leachate in the subsequent processing system. We use air stripping craft to process the leachate, and study effects on ammonia nitrogen removing under all the data of different pH value,remove time,gas-liquid volume ratio and temperature with certain mass concentration and flow of influent ammonia nitrogen, with which the best work parameters and conditions of removing ammonia nitrogen in landfill leachate using air stripping craft can be determined. The air stripping craft should be placed in the forepart of leachate processing system. The ammonia nitrogen removal efficiency increases with 'the rising of pH value, reaction time, gas-liquid volume ratio and temperature. Results show that,using air stripping craft,the best removal efficiency of ammonia nitrogen in landfill leachate can be obtained under all of the following conditions:the pH of 11, blowing off 60 min, gas-liquid volume ratio of 360= 1 and 40℃ temperature.%目的 解决垃圾渗滤液中高质量浓度氨氮对后续处理系统的不利影响.方法 用吹脱工艺对渗滤液进行处理,在进水氨氮质量浓度、流量一定的情况下,考察不同pH值、吹脱时间、气液体积比和温度对氨氮去除效果的影响,确定吹脱工艺去除垃圾渗滤液中氨氮的最佳工作参数和条件.结果 吹脱工艺应放置于渗滤液处理系统前段,吹脱对氨氮的去除效果随pH值、反应时间、气液体积比、温度的增加而上升.结论 pH为11、吹脱60 min,气液体积比为360∶1,温度为40℃条件下,吹脱法对垃圾渗滤液中氨氮去除效果最佳.