Optimal combination of influencing factors for advanced treatment of anaerobic ammonia oxidation effluent by Fenton oxidation
The orthogonal test was used to study the optimal combination of four main factors affecting the initial pH,nFe2+/nH2O2,mH2O2/mCODcr 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＞mH2O2/mCODCr＞nFe2+/nH2O2.The initial pH has a significant effect on the removal rate of CODCr.The influence degree of mH2O2/mCODCr and nFe2+/nH2O2 is close.The optimal combination of the four influencing factors is initial pH = 4.0,nFe2+/nH2O2 = 1:3,mH2O2/mCODCr = 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.
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