title: Simulating a cyclic activated sludge system by employing a modified ASM3 model for wastewater treatment.
abstract: To interpret the biological nutrient removal in a cyclic activated sludge system (CAS), a modified model was developed by combining the process of simultaneous storage and growth, and the kinetics of soluble microbial product (SSMP) and extracellular polymeric substance (XEPS) with activated sludge model no. 3 (ASM3). These most sensitive parameters were initially selected whilst parameters with low sensitivity were given values from literature. The selected parameters were then calibrated on an oxygen uptake rate test and a batch CAS reactor on an operational cycle. The calibrated model was validated using a combination of the measurements from a batch CAS reactor operated for 1 month and the average deviation method. The simulations demonstrated that the modified model was capable of predicting higher effluent concentrations compared to outputs of the ASM3 model. Additionally, it was also shown that the average deviation of effluent SCOD, SNH, SSMPand XEPSsimulated with the modified model was all less than 1 mg L-1. In summary, the model could effectively describe biological processes in a CAS reactor and provide a wonderful tool for operation.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China. nanjun12@126.com.
authors.forename: Jun
authors.initials: J
authors.lastname: Nan
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China.
authors.forename: Xinhui
authors.initials: X
authors.lastname: Zhang
mesh_terms: D019149:Bioreactors; D007700:Kinetics; D012722:Sewage; D014865:Waste Disposal, Fluid; D062065:Wastewater
chemical_list: D012722:Sewage; D062065:Wastewater
keywords: ASM3; Kinetics; Mathematical model; Oxygen uptake rate (OUR); Sensitivity analysis; Simulation