顶部通风在渗滤液循环中的作用研究

Study on the top of aeration in the leachate recirculation

通过对比实验,对顶部木屑层通风和添加活性污泥实现渗滤液循环原位脱氮的可行性进行了研究.实验结果表明,相比于单纯的渗滤液循环,在垃圾体顶部添加的木屑层中通风可以有效地解决渗滤液循环中NH+4N的积累问题,NH+4N的去除率达到77.83%,同时也将CODCr去除率提高了14.46%;在木屑层中加入活性污泥并通风不仅通过提高反应体系内的C/N比改善了微生物的生长环境,还向反应体系内引入了微生物,相比于顶部木屑层通风的渗滤液循环,其NH+4N的去除率提高了13.73%,CODCr的去除率提高了10.64%.

Three experiments have been done to study the feasibility of in situ nitrogen removal by aeration into the wood chips layer and addition of activated sludge in the leachate recirculation, The results show that comparing to the single leachate recirculation, the air injection at the top of the solid waste can decrease the ammonium accumulation effectively. The NH4^＋ -N removal rate reaches to 77.83% and CODer removal rate increases 14.46% at the same time. In addition, adding the activated sludge into the aerated wood chips layer can not only improve the living circumstance of the microorganism by increasing the C/N ratio, but also introduces microorganism into the reaction system, Comparing to the aeration into the wood chips layer in the leachate recirculation, its NH4^＋ -N and CODcr removal rate increase 13.73% and 10.64% , respectively.