Simulation Of Organic Contaminants Degradation Affected By Riverbank

According to the mechanism of river self-purification capacity affected by riverbank, asimplified river water quality model No.1(S-RWQM1) was established to simulate thebiochemical reaction process of organic contaminants degradation in river in this study. Thegoverning equations chose continuous stirred tank reactor (CSTR) equation andone-dimensional convection-diffusion equation in order to verify the simulation result of thebiochemical reaction process and the migration and degradation of organic compounds inwater described by the S-RWQM1.In the CSTR equations, the results of sensitivity analysis of kinetic parameters show thatthe parameter kgro,H,aer,T0affect the content of SSand kresp,H,aer,T0affect the content of XHsignificantly. In the one-dimensional convection-diffusion equations, sensitivity analysisresult show that the river velocity uxaffect the content of SSand roughness of riverbank andkgro,H,aer,T0affect the content of XHsignificantly.Two numerical simulation programs was compiled by using MATLAB to calculate theCSTR and one-dimensional convection-diffusion equations.The correlation coefficients of kgro,H,aer,T0and lipid phosphorus contents, MK/UQ value,and organic matter degradability affected by ceramic glaze, permeable bricks and pine pile is0.995,-0.904,0.988respectively. The correlation coefficients of kgro,H,aer,T0and lipidphosphorus contents and organic matter degradability affected by gabion revetment is0.862,0.990respectively, while the result of kresp,H,aer,T0is0.951,0.997respectively.Simulation accuracy can be improved by adjusting the parameter kgro,H,aer,T0andkresp,H,aer,T0. The simplified RWQM1present a good simulation result and can describe themigration and degradation of organic compounds in water affected by riverbank accurately.