SBR处理渗滤液深度脱氮的影响因素研究

发布时间：2018-06-15 23:42

本文选题：垃圾渗滤液 + SBR　；参考：《中国环境科学》2016年11期

【摘要】：为了解决垃圾渗滤液的脱氮难题,通过改变SBR的操作模式对渗滤液进行处理.同时,试验重点考察了操作模式、曝气时溶解氧、过曝气以及渗滤液碳氮比对工艺脱氮效果的影响.研究结果表明,采用改进SBR对渗滤液进行处理,在原水COD浓度为4000mg/L左右,氨氮浓度为1000mg/L左右,总氮浓度在1100mg/L左右的条件下,不添加任何碳源,出水COD小于500mg/L,氨氮浓度小于5mg/L,总氮浓度小于40mg/L,COD、氨氮和总氮的去除率分别达到了85%、99%和95%以上.影响因素试验表明,反硝化菌中的PHA含量是影响系统脱氮效率的关键.曝气时较高的溶解氧、曝气前的厌氧搅拌以及尽量减少过曝气将提高系统的脱氮效率.同时,只要渗滤液碳氮比大于4,系统均可以对渗滤液实现深度脱氮.
[Abstract]:In order to solve the problem of nitrogen removal in landfill leachate, the leachate is treated by changing the operating mode of SBR. At the same time, the effect of operation mode, dissolved oxygen, excess aeration and carbon nitrogen ratio of percolation fluid in aeration is investigated. The results show that the improved SBR is used to treat the leachate and the concentration of COD in the raw water. Under the condition of about 4000mg/L, the concentration of ammonia nitrogen is about 1000mg/L, the total nitrogen concentration is about 1100mg/L, no carbon source is added, the effluent COD is less than 500mg/L, the concentration of ammonia nitrogen is less than 5mg/L, the total nitrogen concentration is less than 40mg/L, COD, ammonia nitrogen and total nitrogen removal rate is 85%, 99% and more than 95% respectively. Quantity is the key to the efficiency of system denitrification. High dissolved oxygen in aeration, anaerobic agitation before aeration and minimized aeration will increase the efficiency of denitrification. At the same time, the system can achieve deep denitrification as long as the ratio of carbon and nitrogen in leachate is greater than 4.
【作者单位】：北京工业大学北京水质科学与水环境恢复工程重点实验室;山东建筑大学;
【基金】：国家自然科学基金项目(51178007)
【分类号】：X703

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