Research On Optimization Of Design Schemes And Operational Effects Of Standard Upgrading And Reconstruction Of A Domestic Sewage Treatment Plant In Jiangxi

With the rapid economic development of Jiangxi Province and the continuous increase of population,the scale of the city is constantly expanding,which makes the sewage discharge in cities and towns also increase substantially,how to achieve the coordinated development of pollutant discharge and the economy and society is of vital importance to the development of the entire Jiangxi Province.At present,domestic sewage has become the main source of pollution in the river basin in the province,and it is an important reason for the destruction of the aquatic environment,how to make sewage treatment more economical,more reasonable,and more efficient is an important research topic in the current wastewater treatment plant improvement process.To this end,this article investigated numbers of sewage treatment plants in the province through visits and investigations,and then selected a sewage plant for key research.At present,the urbanization process of the area where the sewage treatment plant is located is still accelerating,and the operation of the existing treatment structures of the sewage plant is not enough to meet the national emission standards.Therefore,the wastewater treatment plant urgently needs to be upgraded to adapt to the current rapidly changing situation.(1)First of all,a lot of research has been done on various advanced treatment processes used in domestic sewage treatment plants which have completed the upgrading project.Secondly,through the analysis of the operating principles of these processes,the problems encountered during the operation,and the solutions adopted,once again After comparing reasonableness,economies and applicability,with the goal of the discharge water quality fully reaching the Grade A standard,three effective and feasible process design schemes were finally designed.The core of these three solutions lies in the deep processing system.The core of the three schemes is the deep processing system.Option one adopts secondary treatment effluent + biological aerated filter +denitrification deep bed filter + sodium hypochlorite disinfection process;Option two adopts secondary treatment effluent + high-efficiency sedimentation tank + fiber filter cloth filter tank + sodium hypochlorite disinfection;Scheme 3 adopts secondary treatment effluent + MBR process + ultraviolet disinfection.Scheme 3 adopts secondary treatment effluent + MBR process + ultraviolet disinfection.(2)According to the characteristics of the sewage treatment plant upgrading project and referring to the widely used international index system,after systematic analysis and selection,this paper proposes an evaluation model based on the advanced treatment process plan of the sewage treatment plant.In this evaluation model,the analytic hierarchy process is used to determine the index weight,and then the entropy method is used to objectively modify the index weight,and finally the gray correlation theory is used to estimate each alternative.Finally,the correlation degree of scheme one is 0.6017,the correlation degree of scheme two is 0.7021,and the correlation degree of scheme three is 0.6532.It is determined that the process of "secondary treatment effluent + high-efficiency sedimentation tank + fiber filter cloth filter +sodium hypochlorite disinfection" is more suitable as The ideal process for upgrading and upgrading the urban sewage treatment plant.(3)In this paper,the effluent quality of the sewage treatment plant was continuously monitored for one month after the completion and operation of the sewage treatment plant’s upgrading and renovation project.According to the test results,after the addition of advanced treatment technology,the sewage treatment plant’s effluent quality can reach the first level.class A standard.This shows that the design scheme proposed in this paper can meet the requirements of upgrading and transformation of the domestic sewage treatment plant,provide technical reference for the treatment of water pollution at the location of the sewage treatment plant,and play an important role in protecting the ecological environment of the region.