臭氧-活性炭组合工艺深度处理垃圾渗滤液MBR出水

以垃圾渗滤液MBR出水为研究对象，采用臭氧-活性炭组合工艺对其进行深度处理。相比单一臭氧处理和单一活性炭吸附，臭氧-活性炭组合工艺能提高COD及NH3-N的去除率，并且显示出良好的协同作用。实验中利用三维荧光光谱和凝胶色谱对水质进行分析，同时考察了活性炭种类及预处理方式、活性炭用量、pH及臭氧浓度对COD及NH3-N去除率的影响。结果表明：pH=4.54、臭氧浓度为1.34 mg·min-1、活性炭投加量为10 g·L-1、臭氧处理时间为30 min、活性炭吸附时间为180 min，当垃圾渗滤液MBR出水COD为1 550 mg·L-1，NH3-N为75 mg·L-1时，经处理后，COD浓度为93 mg·L-1，NH3-N浓度为12 mg·L-1，COD的去除率达到94%，NH3-N的去除率达到84%，实现了垃圾渗滤液MBR出水的达标排放。pH对污染物的去除有较为明显的影响，高pH有利于NH3-N的去除，但是过高的pH不利于COD的去除。同时，提高臭氧和活性炭的投加量能明显提高COD及NH3-N的去除率。

Ozone-activated carbon combined technology used in depth treatment of landfill leachate MBR effluent

We used O3 and activated carbon to treat the MBR effluents in landfill leachate.Compared to the separate use of O3 and activated carbon, the combined use of O3 and activated carbon shows higher removal rates of COD and NH3-N, and they show great synergy.In this experiment, three dimensional fluorescence spectra and gel permeation chromatography were used to analyze the water quality.At the same time, the effect of different types of activated carbon and their preprocessing, activated carbon dosage, pH, and ozone concentration on the removal rate of COD and NH3-N were analyzed.The results show that when pH is 4.5±0.1, the ozone concentration is 1.34 mg·min-1, the dosage of activated carbon is 10 g·L-1, the ozone oxidation time is 30 min, the activated carbon adsorption time is 180 min, the COD is 1 550 mg·L-1, the concentration of NH3-N is 75 mg·L-1, then after the reaction, the values of COD and NH3-N come down to 93 mg·L-1 and 12 mg·L-1, respectively.The removal rates of COD and NH3-N reach 92% and 84%, respectively, and the effluent conforms to the discharge standards.pH has an obvious influence on pollutant removal.High pH benefits the removal rate of NH3-N, but diminishes the removal rate of COD.Higher ozone concentrations and the quality of the activated carbon can significantly the removal rate of COD and NH3-N.