Upgrading Reconstruction To Study The Technology Of Heze Zhongkecheng Sewge Treatment Plant

As the problem of environmental pollution is becoming more and more serious, thecontrol for water pollution from the government strengthens increasingly. The requirements ofpollutant reductions from local government are becoming more and more strict, So theupgrading for municipal sewage disposal plant is imperative. According to the watermonitoring and water body section control of Heze environmental protection department, thesecondary effluent discharge standard of Heze Zhongkecheng sewage treatment plant can notmeet the requirement of receiving water. Therefore, Heze Zhongkecheng sewage treatmentplant was required to upgrade to satisfy the requirements of local environmental protectiondepartments, then the effluent quality of Heze Zhongkecheng sewage treatment plant shouldmeet to first grade A class of “Mumicipal wastewater Treatment Plant Pollutant EmissionStandards”(GB18918-2002).Due to the sewage treatment plant belongs to enterprise, capital investment, the choice ofupgrading scheme should take overall consideration at funding, cost control, maintenance andeffluent standards. Therefore, to choose a scheme with less investment, lower operation cost,higher efficiency and higher automation level is an efficient way to meet the requirements oflocal environmental protection policy and profit.The chemical oxygen demand(COD) and biochemical oxygen demand(BOD5) in theeffluent for present treatment process can meet the first grade A class standard, but suspendedsolids(SS),total nitrogen(TN), total phosphorus(TP) and fecal escherichia coli cannot meet thenew effluent discharge standard. And because of the fewer carbon source problem, the removalof nitrogen and phosphorus was difficult to solve. Basing on the basic theory of process design,this paper analyzes the influent and effluent discharge water quality, the treatment process, thetreatment efficiency for all kinds of pollutants by demonstrating and analyzing the upgradingschemes with the methods of comparative analysis, graphic combination and literature analysisusing in this research. The upgrading transformed the original process, and added the advancedtreatment process, mainly handling the problems of nitrogen and phosphorus removal withfewer carbon source, then to chose the best scheme. It can bring certain reference for similarupgrading process of domestic sewage treatment plant.The paper firstly described the background and significance, research methods andtechnical route. Then it compares the theory and practice of the related research domestic and abroad. By comparing and demonstrating treatment efficiency, total investment, operation costand maintenance situation and combining with the analysis of current situation, constraints,resource and integration, it finds the main problems and gets the optimum combination schemefor upgrading, that is inverted A2O+coagulation+filtration+disinfection process was chosen.The facility choosing for each section was also compared and demonstrated in this article. Theemphasis of this article is the demonstration and optimal design for upgrading scheme.Finally, the operation effect of upgrading process and evaluated effect of theimplementation were traced and assessed. We hope it can bring certain reference to theupgrading scheme selection for sewage treatment plants.