【作者】 丛培龙；

【导师】 康建雄；

【作者基本信息】 华中科技大学 ， 环境工程， 2007， 硕士

【摘要】 垃圾渗滤液水质复杂、有机污染物浓度高、氨氮含量高;水质水量变化大。因此,它的处理是国内外水处理难点之一。本试验以武汉市二妃山垃圾填埋场渗滤液作为研究对象,采用缺氧-微氧-好氧（AMO）连续运行的垃圾渗滤液处理工艺,去除垃圾渗滤液中高浓度有机物和氨氮。拟通过对DO、pH等条件的控制,在微氧池内实现短程硝化,并将微氧池内的混合液回流缺氧池;在缺氧池内,反硝化菌以进水中的高浓度有机物为碳源,以亚硝酸盐为氮源,实现短程反硝化。在试验中,对短程硝化反硝化的影响因素进行了研究,发现氨氮、pH、DO是影响AMO工艺脱氮的主要因素。当进水氨氮负荷为0.64kgNH₄⁺-N/（kgMLSS·d）时,亚硝化率达到最大值85.6%;pH值为7.5时,DO为0.75mg/L时,微氧池内出现大量的亚硝酸盐积累。本实验还对AMO处理工艺的脱氮过程进行了研究,阐述了提高脱氮效率的方法和途径。试验证实,采用AMO工艺处理垃圾渗滤液,在pH=7.5、DO=0.75mg/L、氨氮负荷不大于0.64kgNH₄⁺-N/（kgMLSS·d）时,可以有效地实现垃圾渗滤液的短程硝化反硝化,垃圾渗滤液中的氨氮和有机污染物都得到了有效的去除。因此,本研究对于工程实际中的垃圾渗滤液脱氮有一定的指导作用。更多还原

【Abstract】 Landfill leachate contains a variety of pollutants such as organic matter, ammonia, heavy metals, which is high in concentration and often change with time, weather etc. These lead to the difficulty in treating landfill leachate.This study was carried out to investigate the feasibility of integrated biological and physic-chemical treatment technologies in treating leachate,which is from Erfeishan refuse landfill in WuHan. The technics of“AMO”（Anoxic-Micro levels of oxygen-Oxic processes）was used for removing high concentration organic matter and ammonia in leachate. The“M”segment realized the Shortcut nitrification by controlling the DO and pH, then we return the mixture of sludge and wastewater to“A”segment, where the Shortcut denitrification happen.Some of studies investigate the main factors to Shortcut nitrification /denitrification in this experiment. The results demonstrated that there are several chief factors to nitrite accumulation during shortcut nitrification in the technics: ammonia、the pH、the temperature and the dissolved oxygen（DO）concentration; when the activated sludge loading of NH₄⁺-N was 0.64kgNH₄⁺-N/（kgMLSS·d）,the maximum ratios of NO2--N/NO3--N could achieve 85.6%; the NO2--N can accumulate heavily when the pH was 7.5 and the DO was 0.75mg/L. We still did some research about the process of Shortcut nitrification /denitrification, and got some ways to elevate the ratios of nitrite removal.The experiment results show that the AMO technics can implement the Shortcut nitrification /denitrification effectively when pH was 7.5、the DO was 0.75mg/L and the maximum activated sludge loading of NH₄⁺-N was 0.64kgNH₄⁺-N/（kgMLSS·d）,at the same time, the NH₄⁺-N and the COD can also be removed effectively. So this study have an important role of guiding to the practice in nitrite removal of landfill leachate.更多还原