垃圾渗滤液中难降解有机物与氮同步脱除试验研究

Experimental study on refractory organic matter and nitrogen removal in landfill leachate

通过UASB模拟系统研究了不同环境因子对垃圾渗滤液中难降解有机物及氮同步去除效果的影响,分析了UASB模拟系统利用垃圾渗滤液中腐殖质类物质为碳源,对渗滤液中难降解有机物及氮的去除效果。结果表明,pH为7.9~8.4,ORP在-200^-100和-300^-200 mV范围内COD去除率分别为92.05%和95.08%,总氮去除率分别为62.03%和66.73%。三维荧光光谱分析表明,渗滤液中腐殖质类物质荧光强度呈降低趋势,表明垃圾渗滤液中的反硝化菌可利用部分垃圾渗滤液中难降解有机物进行反硝化。COD与总氮去除的最佳ORP范围为-300^-100 mV,实现了垃圾渗滤液中有机物与氮的同步脱除。

Through the up-flow anaerobic sludge bed（ UASB） simulation system, the effects of different environmental factors on the refractory organics and nitrogen synchronization removal in landfill leachate were studied. Then the removal efficiency of organic compounds and nitrogen in leachate was analyzed by using the humus in the UASB simulation system. Results show that under the pH of 7. 9 to 8. 4, ORP of-200 mV to-100 mV and-300 mV to-200 mV, the COD removal rate was 92. 05% and 95. 08%, and total nitrogen removal rate was 62. 03% and 66. 73%, respectively. The three-dimensional fluorescence spectrum analysis showed that humus in the leachate class material showed a trend of decrease, indicating that the denitrification bacteria may use the refractory organic matter in garbage leachate for the denitrification. The optimum ORP range was-300 mV to-100 mV for COD and total nitrogen removal, which realized the simultaneous removal of organic matter and nitrogen in landfill leachate.