SH-A工艺处理晚期垃圾渗滤液影响因素的研究

Study on Influence Factors of Mature Landfill Leachate by SH-A Process

摘要: 本文采用SH-A工艺处理有机物含量高、成分复杂、毒性高、可生化性差、含氨氮高的晚期垃圾渗滤液，分别研究在好氧段及厌氧段的温度、亚硝酸盐氮与氨氮的反应比等条件对垃圾渗滤液脱氮率的影响。在好氧段，进行的全程硝化反应，即有机氮转化为部分氨氮后，氨氮转化为亚硝酸盐氮和硝酸盐氮的过程。在厌氧段，进行的是反硝化反应和厌氧氨氧化作用。在最佳控制条件下，通过全程硝化反硝化与厌氧氨氧化的协同作用达到去除晚期垃圾渗滤液中氨氮的目的。结果表明，好氧段温度为35℃~40℃，厌氧段温度为30℃~40℃，亚硝酸盐氮与氨氮的反应比为 1.1:1~1.2:1时，总氮去除率较高且维持稳定。 In the paper SH-A process was used for the treatment of mature landfill leachate, which contains high organic content, complex component, high toxicity, poor biochemical purification ability and high ammonia nitrogen. The influence of temperature and the nitrite nitrogen-ammonia nitrogen reaction ratio on the denitrification rate of waste leachate was studied separately. In aerobic section, organic nitrogen was converted to part of the ammonia nitrogen, while ammonia nitrogen was converted to nitrite nitrogen and nitrate nitrogen, which was named complete nitrification reaction. In anaerobic section, the denitrification reaction and anaerobic ammonia oxidation was conducted. On the optimal conditions, the synergistic effect the complete nitrification denitrification and anaerobic ammonia oxidation was conducted to remove ammonia nitrogen of mature landfill leachate. On the condition that the temperature of aerobic period of was 35˚C to 40˚C, temperature of anaerobic period was 30˚C to 40˚C, nitrite nitrogen-ammonia nitrogen reaction ratio was 1.1:1 ~ 1.2:1, and the total nitrogen removal efficiency maintained comparable high and stable.