芬顿氧化深度处理厌氧氨氧化出水影响因素的最优组合

Optimal combination of influencing factors for advanced treatment of anaerobic ammonia oxidation effluent by Fenton oxidation

利用正交试验对影响芬顿氧化深度处理垃圾渗滤液厌氧氨氧化出水的起始pH、nFe^(2+)/nH_(2)O_(2)、mH_(2)O_(2)/mCOD_(cr)、反应温度4种主要因素的最优组合开展研究。结果表明:4种因素均对芬顿氧化深度处理垃圾渗滤液厌氧氨氧化出水产生显著影响,影响顺序为起始pH>反应温度>mH_(2)O_(2)/mCOD_(Cr)>nFe^(2+)/nH_(2)O_(2),起始pH对COD_(Cr)去除率影响极显著,mH_(2)O_(2)/mCOD_(Cr)和nFe^(2+)/nH_(2)O_(2)影响程度较为接近;4种影响因素最优组合为起始pH=4.0、nFe^(2+)/nH_(2)O_(2)=1:3、mH_(2)O_(2)/mCOD_(Cr)=4:1、反应温度=20℃,该条件下COD_(Cr)和色度去除率高达92.4%和99.1%,出水可生化性好,处理效果达到工程应用要求,可为该联用系统的芬顿处理段提供一定的技术支撑。

The orthogonal test was used to study the optimal combination of four main factors affecting the initial pH,nFe^(2+)/nH_(2)O_(2),mH_(2)O_(2)/mCOD_(cr) and reaction temperature of anaerobic ammonia oxidation effluent of landfill leachate advanced treatment by Fenton oxidation.The results showed that all four factors had significant effects on the anaerobic ammonium oxidation effluent of landfill leachate treated by Fenton oxidation.The order of influence is initial pH>reaction temperature>mH_(2)O_(2)/mCOD_(Cr)>nFe^(2+)/nH_(2)O_(2).The initial pH has a significant effect on the removal rate of COD_(Cr).The influence degree of mH_(2)O_(2)/mCOD_(Cr) and nFe^(2+)/nH_(2)O_(2) is close.The optimal combination of the four influencing factors is initial pH=4.0,nFe^(2+)/nH_(2)O_(2)=1:3,mH_(2)O_(2)/mCOD_(Cr)=4:1,reaction temperature=20℃.Under this condition,the removal rates of CODCr and chroma are as high as 92.4% and 99.1%.The effluent has good biodegradability and the treatment effect meets the requirements of engineering application.It can provide some technical support for the Fenton treatment section of the combined system.