Activated Sludge Model 1 (ASM 1)

The most simulation models of wastewater treatment have been based on ASM1that developed about a main model of activated sludge by International Research Institute for Water Pollution Control. It can be use to explain the rate of cell mass growth resulting in degradable Chemical Oxygen Demand (COD) and Nitrogen (N) (Particulate and soluble) in systems contain the both aerobic and anoxic zones of treatment. In municipal wastewater treatment using activated sludge process, the whole process continuously to ensure continuity and compliance with legal requirements and minimize costs, especially energy must be controlled. Organic matter, dissolved molecules, colloids and solids, minerals, soluble forms of nitrogen (ammonium, nitrite and nitrate) and phosphorus discharges and concentrations will change with time. In current research the relatively complex models of processes of remove the anoxic and aerobic nitrogen and carbon (C) considering the assumptions and mathematical equations and kinetics were followed in municipal wastewater treatment. In order to provide a model, in the form of a matrix, there are a range of reactions. According to the obtained results ASM1 was formed of a matrix 13 ? 8.