The Process Research Of Taoxian Sewage Treatment Plant In Hunnan Metro And Majorization Of Design Parameter

In the Eleventh Five-Year Plan, programming points out, strengthen the pollutantsemission reduction and management, to speed up the urban sewage treatment, garbage disposalfacilities, increase the prevention and control of water pollution in key river valleys strength,strict standards for pollutants discharge and environmental impact assessment. From that, theurban sewage treatment infrastructure construction at present and in the future is still a very longperiod the social economic construction is one of the important problems. More strict standardsand resource conservation and environment friendly society the construction goal, to the citysewage treatment plant construction in the choice of technological scheme optimization andresource to rational allocation and use put forward higher request. So, for urban sewagetreatment process program of research and design optimization of parameters will become thesewage treatment plant construction of the necessary premise.In this paper, Taoxian Hunnan Metro Wastewater Treatment Plant, for example to conductresearch studies including water quality and quantity of the sewage treatment plant analysis andto determine, analyze and process plan selection and design parameters for optimization.According to the development of the new town planning muddy south, the waterconsumption per capita comprehensive index method, the unit life construction land indexmethod, and different properties of water land index method, three methods to this area water toreasonable forecast,zhe design capacity of Taoxian Hunnan Metro Wastewater Treatment is140000m3/d.Reference Shenyang sewage treatment plant influent water quality, combined withthe similar size of treatment plants water quality,its design water quality is SS=200mg/L,BOD5=180mg/L, CODcr=400mg/L, NH4+-N=30mg/L, TP=4mg/L.According to the sewagetreatment plant processing Taoxian water into the ShenFu GuanQu. In the river water addedwater, improve the landscape, the forward according to water requirements, part used forindustrial enterprise the production water back, determine treatment of outlet water to achieve《urban sewage treatment plants standands for pollutants discharge (GB18918-2002)》level Aemissions standards is SS=10mg/L,BOD5=10mg/L,CODcr=50mg/L,NH3-N=5mg/L, TP=0.5mg/L.Combined with the actual situation of taoxian sewage treatment plant and the designrequirements, through to the sewage treatment plant, the secondary processing technology, deeptreatment and sludge treatment process analysis and comparison, determined the "constant waterlevel sequencing batch reactor technology (CWSBR process) and dynamic flow sand pondsultraviolet disinfection system and sludge concentration mechanical dehydration process schemeof sewage treatment plant. In this scheme as the foundation, the treatment of the designparameters optimization structures and design calculation, and completed construction drawingdesign. Finally, for the engineering is economic and engineering benefit analysis.With constant water level sequencing batch reactor technology (CWSBR process) assecondary processing technology, dynamic flow sand ponds as level3processing technology andthe ultraviolet disinfection system to secondary treatment water depth for treatment, it can makethe treatment of outlet water reached《the urban sewage treatment plants standards for pollutants discharge (GB18918-2002)》level A emissions standards, meet the design requirements of thefactory, and at the same time, to other similar sewage treatment plant design offers reference.