title: Degradation behavior of dimethyl phthalate in an anaerobic/anoxic/oxic system.
abstract: Dimethyl phthalate (DMP) as one of the most important and extensively used Phthalic acid esters (PAEs) is known to likely cause dysfunctions of the endocrine systems, liver, and nervous systems of animals. In this paper, the degradation and behavior of DMP were investigated in a laboratory scale anaerobic/anoxic/oxic (AAO) treatment system. In addition, a degradation model including biodegradation and sorption was formulated so as to evaluate the fate of DMP in the treatment system, and a mass balance model was designed to determine kinetic parameters of the removal model. The study indicated that the optimal operation condition of HRT and SRT for DMP and nutrients removal were 18 h and 15 d respectively, and the degradation rates of anaerobic, anoxic and aerobic zones for DMP were 13.4%, 13.0% and 67.7%, respectively. Under the optimal conditions, the degraded DMP was 73.8%, the released DMP in the effluent was 5.8%, the accumulated DMP was 19.3%, and the remained DMP in the waste sludge was 1.1%. Moreover, the degradation process of DMP by acclimated activated sludge was in accordance with the first-order kinetics equation. The model can be used for accurately modeling the degradation and behavior of DMP in the AAO system.
authors.affiliation: School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-Sen University, Guangzhou 510275, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Fujian Quanzhou Foreign Language Middle School, Quanzhou 362002, PR China.
authors.forename: Zehua
authors.initials: Z
authors.lastname: Huang
authors.affiliation: Department of Water Resources and Environment, Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, Sun Yat-sen University, Guangzhou 510275, PR China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Water Resources and Environment, Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, Sun Yat-sen University, Guangzhou 510275, PR China. Electronic address: huangmzh6@mail.sysu.edu.cn.
authors.forename: Mingzhi
authors.initials: M
authors.lastname: Huang
authors.affiliation: School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-Sen University, Guangzhou 510275, PR China. Electronic address: ruanjujun@mail.sysu.edu.cn.
authors.forename: Jujun
authors.initials: J
authors.lastname: Ruan
mesh_terms: D001673:Biodegradation, Environmental; D007700:Kinetics; D008962:Models, Theoretical; D010795:Phthalic Acids / Q000737:chemistry / Q000378:metabolism*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*
chemical_list: D010795:Phthalic Acids; D012722:Sewage; D014874:Water Pollutants, Chemical; C024629:dimethyl phthalate
keywords: Anaerobic/anoxic/oxic system; Behavior; Degradation; Dimethyl phthalate (DMP); Kinetic