Research On Extansion And Improvement Of Standards Upgrading In Changchun Tian Jia Water Purification Plant

With the rapid development of changchun city economy,people’s living standards greatly improved,urban wastewater quantity increased year by year,serious environmental damage,Yitong river basin water environmental pollution is becoming more and more serious.In June 2015,a new round of comprehensive treatment and thyme yitong river valley ecological corridor construction project officially started.Changchun Tian Jia Water Purification belongs to yitong string of lake basin,river water system.Due to the wastewater emissions is increasing in recent years,The existing handling capacity of Tian Jia water purification can not have satisfied wastewater,so upgrade Tian Jia Water Purification.According to water quality characteristics of discharge water quality purification plant area,through investigation and study,according to the status quo of Tian Jia water purification plant actual situation,on the depth of pretreatment,biochemical treatment,treatment,sludge treatment,smell the design scheme of the comprehensive advantages and technical and economic comparison,this paper intends to select a suitable day fine water quality purification plant expansion,DiBiao renovation process scheme.The engineering design of total scale of 40000 m~3 / d,total variation coefficient is 1.0.Divided into new and transformation 2: most of the original processing capacity of 20000 m~3 / d pretreatment system for water capacity of 40000 m~3 / d.The original biochemical treatment system for the processing capacity of 10000 m~3 / d;Another 30000 m~3 / d new biochemical treatment system and 40000 m~3 / d depth processing system.After scheme comparison,determine sewage plant process:Transform part: 1,is now determined pretreatment solution,can build structures for existing of pretreatment,the salt,use of the existing civil engineering,replacing part of the equipment,including coarse grille,sewage pump,fine grille,etc.;2,"hydrolysis acidification pool + aeration biological filter system retrofit scheme determined,the project of old system USES the original solution,specific as follows: the scale of the original system design for 10000 m~3 / d,transform the hydrolysis acidification pool 2 case become efficient sedimentation tank,aeration biological filter to replace part of the equipment,improve the reflux ratio.Scheme in the 3,deodorant,two levels of deodorization technology of cross processing,comprehensive implement stench of the plant reach the standard level.4,sludge treatment retrofit scheme determination,the use of the existing sludge dewatering between civil facilities,the original position to expand the sludge storage tank volume,improve the sludge retention time,the sludge treatment scheme concentrates centrifugal hydroextractor integrated,condensed the sludge dehydration to after the moisture content of 80% to changchun city center focus on sludge disposal.5,ozone disinfection process to determine the project adopts + sodium hypochlorite as sterilization process,reduce the processing cost.The new part : adopt pretreatment +(A2 / O + IFAS + the rectangle around the water out of the water surrounding the second pond + efficient sedimentation tank + continuous flow sand filter,ozone oxidation process(deodorization process using deodorant + biological deodorization filter deodorant).After the completion of this project,the effluent quality can reach the B standard of "water pollutant comprehensive discharge standard"(DB11/307-2013-Beijing).The timely and effective treatment of wastewater discharged in the region can protect the water quality and water quality of the lake series and improve the comprehensive utilization of water resources,which can play a good role in environmental protection.