The Optimization Study Of AEB System Based On The Treatment With Water Environment Of The Tumen River

With the development of social economy, water pollution is becoming more and more serious. It has a great significance to improve the state of water pollution by studing on the high efficient and low cost technology for wastewater treatment. The Atmosphere-Exposed Biofilm system with less investment, low operating cost and simple management is adopted by the paper to deal with synthetic wastewater. Through the investigation and analysis on the treating performance for synthetic wastewater under different running conditions, the system operating conditions was optimized. At the same time, with the discussing something about kinetic study and kinetic parameters, the kinetic model for matrix degradation was established. And the system provides theoretical basis for popularization and application in Yanbian area by the economic evaluation on the system. We can get some conclusions through the research from different aspects:1) The effluent concentrations of COD, TN and TP in the Atmosphere-Exposed Biofilm all met the level 1 B standard of’discharge standard of pollutants in the municipal sewage treatment plant’under the range of 400-700 m/m3 for the filling rate of filter material. The effluent concentrations of COD and TN were lowest and the removal rates were highest under the filling rate of 600 m/m³. A good correlation existed between pollutant removal rate and filling rate on the filter material with per unit length. Combined with effluent quality treatment effect and the trend of removal rate, the best filling rate is at 600 m/m³.2) Hydraulic loading had different degrees of impact on COD, TN and TP under the range of 4.3-21.3m/d. The best removal rates of COD, TN and TP arreared at 17.0 m/d,17.0 m/d and 21.3 m/d, respectively. The effluent concentrations of COD and TN met the level 1 A standard of’discharge standard of pollutants in the municipal sewage treatment plant’ under the range of 17.0～ 21.3 m/d. The effluent concentrations of TP met level 1 B standard. The removal rates of COD, TN and TP were relatively constant, hydraulic loading and processing feature have a certain correlation at all operation range in the system.The best hydraulic loading was 17.0m/d in the system,which is determined by the results of the treatment effect, removal rate and some correlation analysis.3) We can get some conclusions from kinetics study:kinetic parameters k of organic pollution degradation was 3.8674 and n was 0.6441. The kinetic model for organic pollution degradation was Se=Sox{exp(-3.8674H/q^0.6441)/[（1+I）-Iexp((-3.8674H/q^0.6441)]}. The effluent quqality of COD could be forcasted well by the model.4) Through the economic analysis of Atmosphere-Exposed Biofilm system, the energy consumption level of the system was 0.83kW·h/kgCOD, which was less than the average energy consumption level in the nation and yanji. So the system has a competitive ability in the practical application.