Experimental Study Of Enhanced Coagulation SBR Method For Treating Decentralized Domestic Sewage

In recent years, the pollution source of decentralized domestic sewage appears with the development of national economy and the facilitation of urbanization. At present, sewages discharged by many pollution sources do not enter into urban sewage collection network due to various reasons. It is very common situation that sewages are discharged randomly without being treated by the Sewage Treatment Works. These sewages not only pollute surface water environment but also destroy aquatic ecosystem."The urban sewage treatment and pollution control related policy" requires that sewages which can’t be incorporated into the urban sewage collection network and system such as sewages discharged by residential areas, leisure vacation villages, tourism scenic spots, nursing homes, airports, railway stations and industrial wastewater discharged by some independent industrial and mining areas, should be treated on-site adopting certain methods in order to ensure pollutant discharge up to the discharge standard.The technology study of enhanced coagulation SBR method for treating decentralized domestic sewage combined with the current situation of the management for domestic sewage pollution source in our country, makes a comparison and analysis to the management technology and method for the pollution source of decentralized domestic sewage. The enhanced coagulation SBR method is used to treat decentralized domestic sewage. Through related experiments, the optimum condition and the optimal operation parameters of enhanced coagulation SBR method to treat domestic sewage are determined:The Optimum aeration time is30.0min; when the sewage influent concentration (near400.0mg/L) within a certain range of volatility, the impact of the treatment effect is not obvious; the The Optimum sedimentation time is30min, The Optimum of Decanter time is5.0s; The Optimum value range of DO is8.5-9.1mg/L, the optimum temperature is28.0°C; the optimum value of pH is6.5-7.5; the the optimum concentration of sludge is3000.0gMLSS/L.