Research On Upgrading Scheme Of Tai He Country Wastewater Treatment Plant

30 years of reform and opening up,China's urbanization level in the direction of rapid development,GDP has leapt to the world's second,people's living standards increased year by year.However,the environmental problems caused by urbanization are becoming more and more serious,especially the water pollution problem is particularly prominent.Based on this to solve the problem of water pollution,the state and local introduction of new sewage discharge standards,the country's sewage plants have to face the situation of upgrading.In this paper,Taihe County sewage treatment plant upgrade project,for example,the first phase of the sewage treatment plant process using "pretreatment + oxidation ditch" secondary biochemical treatment process,the first phase of the sewage treatment plant design capacity of 20,000 m3 / d,In 2010 when the state has been in a very heavy load,part of the month has more than20,000 m3/ d.On the first phase of the project,the water quality concentration did not meet the design standards,effluent quality reached a B standard,but according to the existing "urban sewage treatment plant pollutant discharge standards"(GB18918-2002),a project did not reach one Level A standard.For now,the first phase of the wastewater treament plant project is no longer adapt to the current water quality emission standards,upgrading is imperative.Combined with Taihe County economic development,capital utilization,construction cycle and other factors to consider.Sewage treatment plant two projects to upgrade 2 × 104m3/d,sewage treatment using two treatment process,the new part of the depth of treatment using "micro-flocculation filter + cl O2 disinfection" process.From the economic and technological situation and from the status of the sewage plant land use situation comparison,the second phase of the upgrading of sludge treatment process selection of sludge concentration conditioning + plate and frame filter +sanitary landfill project.For the choice of disinfection methods Taihe County sewage treatment plant Phase II project using chlorine dioxide process.After the completion of the second phase of the renovation project,the effluent quality meet the "urban sewage treatment plant pollutant discharge standards"(GB18918-2002)in the A standard.It is very difficult to rebuild the old city in the short term.When the first phase of thesewage treatment plant has been converted into a shut-off flow system,it will be retained for the time being.When the conditions are ripe With the transformation of the old city to transform it into rain and sewage diversion system.