title: Biological phosphorus removal in an extended ASM2 model: Roles of extracellular polymeric substances and kinetic modeling.
abstract: This paper presents the results of an extended ASM2 model for the modeling and calibration of the role of extracellular polymeric substances (EPS) in phosphorus (P) removal in an anaerobic-aerobic process. In this extended ASM2 model, two new components, the bound EPS (XEPS) and the soluble EPS (SEPS), are introduced. Compared with the ASM2, 7.71, 8.53, and 9.28% decreases in polyphosphate (polyP) were observed in the extended ASM2 in three sequencing batch reactors feeding with different COD/P ratios, indicating that 7.71-9.28% of P in the liquid was adsorbed by EPS. Sensitive analysis indicated that, five parameters were the significant influential parameters and had been chosen for further model calibration by using the least square method to simulate by MATLAB. This extended ASM2 has been successfully established to simulate the output variables and provides a useful reference for the mathematic simulations of the role of EPS in biological phosphorus removal process.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150000, PR China; School of Architecture, Harbin Institute of Technology, Harbin 150000, PR China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Yang
authors.affiliation: China North Municipal Engineering Design Institute, Tianjin 300074, PR China.
authors.forename: Ji-Wei
authors.initials: JW
authors.lastname: Pang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150000, PR China.
authors.forename: Wan-Qian
authors.initials: WQ
authors.lastname: Guo
authors.affiliation: School of Architecture, Harbin Institute of Technology, Harbin 150000, PR China.
authors.forename: Xiao-Yin
authors.initials: XY
authors.lastname: Yang
authors.affiliation: School of Architecture, Harbin Institute of Technology, Harbin 150000, PR China.
authors.forename: Zhong-Yang
authors.initials: ZY
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150000, PR China.
authors.forename: Nan-Qi
authors.initials: NQ
authors.lastname: Ren
authors.affiliation: School of Architecture, Harbin Institute of Technology, Harbin 150000, PR China. Electronic address: zhaozq88@126.com.
authors.forename: Zhi-Qing
authors.initials: ZQ
authors.lastname: Zhao
mesh_terms: D000327:Adsorption; D000332:Aerobiosis; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D001704:Biopolymers / Q000737:chemistry*; D003198:Computer Simulation; D007700:Kinetics; D008962:Models, Theoretical; D010758:Phosphorus / Q000302:isolation & purification*; D012722:Sewage
chemical_list: D001704:Biopolymers; D012722:Sewage; D010758:Phosphorus
keywords: Activated sludge model no. 2 (ASM2); Biological phosphorus removal; Extracellular polymeric substances (EPS); Kinetic modeling; Sensitivity analyses