Study On Construction Planning For The Town-level Sewage Treatment Projects In Shanxi Province

According to the requirement in 《the inform concerning to working out the urban wastewater disposal and reuse in our country》 send by the national development and reformation committee office, in order to control the pollution of the water and alleviate the imbalance between supply and demand of water resource of Shanxi ,with the guidance of the theory for water pollution control planning ,in accordance with the strategies for control ..utilization ,and protection of the water ,this thesis workouts the pollution control planning of the urban waste water of Shan xi province ,puts forward the engineering scenarios and implementation suggestions on the town-level water pollution control in Shanxi.In this study, investigation and analysis was carried out on background information of environment ,social economy and state of wastewater discharge or treatment involved in 22 cities and 85 counties of Shanxi .In 2004 ,the emission of urban sewage will be 254.81ten thousand m3 / d ,and discharge pollutant COD 33.5 ten thousand tons,SS 26 ten thousand tons, BOD519.5 ten thousand tons,NH3-N 2.1 ten thousandtons, TP 0.37 ten thousand tons. Currently only 17 urban sewage treatment plants were built up andoperated steadily , deals with the sewage 98.89 ten thousand m3/d, remains 158.92 ten thousand m3/d of the sewage to flow into rivers directly , this resulted in the severe pollution of the surface water in Shanxi .Hence ,the pollution control of the sewage is a key .In accordance with the natural increase rate of population and the trend for Shanxi provincial urbanization development in the next several decades ,this thesis forecasts the population with water supply in the various towns ; in accordance with 《the water supply criterion》 .combining with the present status of water supply and sewerage discharge ,it confirms the standard for per capita sewerage generateon ;in accordance with the operation status of the existing sewage treatment plants in Shanxi province and the experience of the similar towns in China ,it formulates the COD concentration of inlet sewage and forecasts the served population of water supply, volumes of water supply and sewerage generation ,and the total discharge of water pollutants in 2010 year for the towns ;According to the result, we find out that: by the end of 2010,the emission of urban sewage will be 424.76 ten thousand m3/d, and discharge pollutant COD 62 ten thousand tons, SS 46.5 ten thousand tons, BOD5 35.7 ten thousand tons, NH3-N 4.7 ten thousand tons,TP 1.3 ten thousand tons.Currently ,there are 17 urban sewage treatment plants built up ,dealing with the sewage 104.39 ten thousand m3/d , and 27 urban sewage treatment plants being constructing ,dealing with the sewage 68.7 ten thousand m3/d .According to the aim: by the end of 2010,the rate of wastewater disposal must reach to 70%,and thereuse rate of wastewater must exceed 30%. Finally ,it concludes by 2010 that the total sewage treatment capacity of the cities and counties in Shanxi province should be newly increased with 174.35 ten thousand m3/d ,with an investment of RMB 2.964 billion Yuan ;the total sewage treatment capacity of the major towns should be increased with 154.45 ten thousand m3/d , with an investment of RMB 2.63 billion Yuan ;the reuse of recycled water should be increased with 88 ten thousand m3/d , with an investment of RMB 0.53 billion Yuan .After the completion ,the capacity for pullant reduction will rise : COD 23.6 ten thousand tons per year , SSI8.5 ten thousand tons per year , BOD5 14 ten thousand tons per year,NH3-N 16.7 ten thousand tons per year , TP0.29 ten thousand tons per year.