The Simulation Of Partial Ammonium Oxidation To Nitrite Coupled With Subsequent Anammox Process

In the last decade, the treatment of high ammoniacal concentration effluents has become of great interest. Various effluents can contain some hundred milligrams of nitrogen per liter(supernatants from anaerobic digestion, leachates from municipal landfill,...)may need specific treatment before recycling them to the plant inlet. Partial nitrification process and Anammox process have been developed to solve the problem. Since the Activated Sludge Model was brought forward by International Water Quality Association in 1980s, as a new tool in the design and research of wastewater treatment technology and in the operation of the wastewater treatment, this model has been extensively applied in the operation of wastewater treatment plants and in the removal of nitrogen and phosphorus through traditional activated sludge treatment technology. However, researches on this subject can be rarely seen in China.The Activated Sludge Model No.1 can help the practical wastewater plants and develop the process. In this paper, the partial nitrification process had been implemented. Based on the ASM1, the AQUASIM software is used to simulate the partial nitrification process. Also, the influents of the pH in the system have been studied in the paper. This thesis used mathematical model to analyze dynamical parameters of activated sludge model and their impact on the wastewater characterization.The model forecast different NH4~+ concentration of the flow after the partial nitrification treatment. The results were available and showed that the model can be used in the practical operation management. Different dissolved oxygen concentrations in the reactor are studied in the paper. The results show that dissolved oxygen concentrations between 1.0-2.0mg/L are the best reasonable limits.