title: Relationship between soluble microbial products (SMP) and effluent organic matter (EfOM): characterized by fluorescence excitation emission matrix coupled with parallel factor analysis.
abstract: Effluent organic matter (EfOM) originating from wastewater treatment plant (WWTP) is of significant concern, as it not only influences the discharge quality of WWTP but also exerts a significant effect on the efficiency of the downstream advanced treatment facilities. Soluble microbial products (SMP) is a major part of EfOM. In order to further understand the relationship between soluble microbial products (SMP) and EfOM, and in turn, to propose measures for EfOM control, the formation of SMP and EfOM in identical activated sludge sequencing batch reactors (SBR) with different feed water was investigated using fluorescence excitation and emission spectroscopy matrix coupled with parallel factor analysis (EEM-PARAFAC) as well as other organic matter quantification tools. Results showed that EfOM contained not only SMP but also a considerable amount of allochthonous organic matter that derived not merely from natural organic matter (NOM). Four components in EfOM/SMP were identified by EEM-PARAFAC. Tyrosine-like substances in EfOM (Component 3, λex/em=270/316 nm) were mainly originated from utilization associated products (UAP) of SMP. Tryptophan-like substances (Component 2, λex/em=280/336 nm) as well as fulvic-like and humic-like substances in EfOM (Component 1, λex/em=240(290)/392 nm and Component 4, λex/em=260(365)/444 nm) were majorly derived from the refractory substances introduced along with the influent, among which Component 2 was stemmed from sources other than NOM. As solid retention time (SRT) increased, Component 2 and polysaccharides in SMP/EfOM decreased, while Component 4 in SMP increased.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Huarong
authors.initials: H
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Fangshu
authors.initials: F
authors.lastname: Qu
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, PR China.
authors.forename: Lianpeng
authors.initials: L
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, PR China. Electronic address: hitliangheng@163.com.
authors.forename: Heng
authors.initials: H
authors.lastname: Liang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Zhengshuang
authors.initials: Z
authors.lastname: Han
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Haiqing
authors.initials: H
authors.lastname: Chang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Senlin
authors.initials: S
authors.lastname: Shao
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Guibai
authors.initials: G
authors.lastname: Li
mesh_terms: D001578:Benzopyrans / Q000032:analysis; D005163:Factor Analysis, Statistical; D006812:Humic Substances / Q000032:analysis; D011134:Polysaccharides / Q000032:analysis; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D012995:Solubility; D013050:Spectrometry, Fluorescence; D014364:Tryptophan / Q000032:analysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D001578:Benzopyrans; D006812:Humic Substances; D011134:Polysaccharides; D012722:Sewage; D014364:Tryptophan; D062065:Wastewater; D014874:Water Pollutants, Chemical; C005023:fulvic acid
keywords: Effluent organic matter (EfOM); Excitation emission matrix (EEM); Natural organic matter (NOM); Parallel factor analysis (PARAFAC); Soluble microbial products (SMP)