碳源和COD/N对短程反硝化处理垃圾焚烧渗沥液产N2O的影响与调控

采用短程硝化反硝化工艺处理垃圾焚烧渗沥液厌氧出水，研究反硝化过程中碳源种类（乙酸钠、甲醇、葡萄糖）和碳氮比（1.5、2.5、3.5、5.0）对N2O产生的影响，以实现N2O的高效产生。结果表明，反硝化系统中N2O的产生受外加碳源种类和碳氮比影响较大。在反硝化所需碳氮比（COD/N=5.0）条件下，高效产N2O的碳源种类为乙酸钠，N2O转化率为6.9%。以乙酸钠为碳源，在碳氮比为3.5时N2O产量最大，N2O转化率可达15%。通过最佳产N2O条件下微生物群落分析发现，一些有助于N2O产生的反硝化菌得到富集。因此，通过碳源和COD/N等参数的调控，能够实现垃圾焚烧渗沥液反硝化段N2O的高效产生。

Effects of carbon source and COD/N on nitrous oxide production during treatment of leachate from MSW incineration plant by short cut denitrification and its regulation

A short-cut nitrification and denitrification system was used to treat anaerobically-treated leachate from a municipal solid waste (MSW) incineration plant. The effects of carbon source (acetate, methanol and glucose) and COD/N (1.5, 2.5, 3.5 and 5) on nitrous oxide production were investigated in this study to achieve high production efficiency of nitrous oxide. The results showed that carbon source and COD/N significantly affected the production of nitrous oxide.Higher nitrous oxide production rate was achieved when the reactor was fed leachate with acetate as the carbon source compared with the other two carbon sources, with a nitrous oxide conversion efficiency of 6.9%. Taking acetate as the carbon source and adjusting COD/N to 3.5, a highest nitrous oxide conversion efficiency was achieved as high as 15%. According to the microbial community analysis under the optimal conditions, the proportions of some genus with nitrous oxide as the terminal denitrification product were significantly increased. Therefore, the high production efficiency of nitrous oxide could be achieved during the denitrification treatment of the leachate from MSW incineration plant by regulating the carbon source and COD/N.