Study On Hydraulic Behavior And Nitrogen Removal Of The Novel Compact Purifying Tank In Wastewater Treatment

Water resources are essential to the survival of human beings. It is an important factor to ensure social harmony, stability and development of production. However, due to the rapid development of urbanization, industrialization and intensive agricultural production,the water environment pollution in people's lives is becoming more and more serious.Among them, the accumulation of N in water is the most serious. How to control the pollution caused by the accumulation of N in the water in an energy-saving, sustainable and efficient manner, has gradually become one of the major issues faced by environmental workers in the field of experimental research. In 90s, foreign scientists found a new biological nitrogen removal technology, this new type of integrated biological has a lot of merits such as a small footprint, low energy consumption, high efficiency, less residual sludge.However, there are few studies on the short cut nitrification and anaerobic ammonium oxidation in the process of biological nitrogen removal. In this research, a new type of integrated wastewater treatment and purification tank experimental device is developed based on the improvement of traditional biological reactor, will combined application of short cut nitrification process and anaerobic ammonium oxidation process in an integrated biological reaction purification tank, and compared with the actual effect of the short cut nitrification and anaerobic ammonium oxidation process under the conditions of intermittent aeration combined with the step-feed multistage A/O, discusses the hydraulic behavior of purification tank reactor and denitrification function, qualitative analysis,quantitative hydraulic behavior of the reaction tank, provide a theoretical basis for the practical design and application of purification tank.In the process of anaerobic ammonium oxidation, the aerobic zone is in line with the whole mixed flow model and has a smaller push flow rate. The anaerobic zone is in series with a number of reactor models. When the inlet velocity is 1L/h, the residence time of wastewater is high in the reactor, which is helpful to mix with microbial wastewater,improve the shock resistance ability, treatment efficiency and effluent water quality, is conducive to water is relatively stable, the final model integrated reactor on ammonia nitrogen removal rate can reach 70%.In the combination of step-feed multistage A/O process, this new type of integrated reactor has a strong impact on the resistance, it is conducive to improving the efficiency of the reaction. The influent flow rate is 1L/h, which has an ideal hydraulic behavior, which is beneficial to the improvement of nitrogen removal efficiency. The effect of C/N ratio on nitrification and denitrification was obvious. With the increase of C/N from 0.5 to 2, the denitrification efficiency of the reactor increased from 35.2% to 84.2%, and the removal rate of NH4-N in the treatment of real wastewater could reach 84.6%.Under the condition of each reaction tank for the removal of COD is generally high, basically reached more than 80%, the highest reached 87.5%, which indicates that in the intermittent aeration conditions,in the process of nitrification reaction makes full use of carbon source, carbon removal efficiency of the process is high. When C/N was 0.5, the removal rate of TIN was only 30.2%. With the increase of C/N, the removal rate of TIN was 47.2% and 78.9%, and the removal rate of TIN in the treatment of real wastewater is the most stable can reach 88.8%.