SBR处理老龄垃圾渗滤液深度脱氮反应条件的优化

为解决老龄垃圾渗滤液的脱氮难题,以物化法处理后的垃圾渗滤液为研究对象,采用SBR实验装置进行处理,确定其最佳的运行方式、曝气量、碳源补充量、实验用水量。结果表明,经SBR实验装置曝气4 h静置4 h处理后,物化后老龄垃圾渗滤液中COD和NH_(3)-N均有较好的去除效果,有效降解其污染物,最佳的运行方式为曝气4 h静置4 h一个循环。曝气量为0.75 m^(3)/h时对出水NH_(3)-N的去除效率最高,去除率达86.72%;采用进水初始COD/NH_(3)-N≈25时,对出水NH_(3)-N的去除效率较好,污泥负荷适中,有利于活性污泥凝聚沉降;采用实验用水量为4 L时,对出水NH_(3)-N的去除效果良好,更有利于老龄垃圾渗滤液中污染物的降解。

In order to solve the problem of denitrification of the aged landfill leachate,this study takes the landfill leachate treated by the physical and chemical method as the research object,and uses the SBR experimental device for treatment to determine its optimal operation mode,aeration volume,carbon source supplementation,and test water consumption.The results show that after aeration of the SBR experimental device for 4 hours and standing for 4 hours,the COD and NH_(3)-N in the aged landfill leachate after physicalization have a good removal effect and effectively degrade the pollutants.The best operation method is aeration for 4 hours and let stand for 4 hours for a cycle.When the aeration rate is 0.75 m^(3)/h,the removal efficiency of NH_(3)-N in the effluent is the highest,and the removal rate is 86.72%.When the ratio of initial COD to NH_(3)-N is approximately equal to 25,the removal efficiency of effluent NH_(3)-N is better and the sludge load is moderate,which is more conducive to activated sludge coagulation and sedimentation.When the test water consumption is 4 L,the removal effect of NH_(3)-N in the effluent is good,which is more conducive to the degradation of pollutants in the old landfill leachate.