科研之友
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摘要
With the development of industrial parks, wastewater treatment in industrial parks has caused more and more attentions. The composition of dissolved organic matter (dissolved organic matter, DOM) in wastewater has a significant effect on the treatment efficiency. Therefore, in this study, DOM components variation along the process and their sources in wastewater treatment plants(WWTPs) in five industrial parks of Jiangxi province were investigated by three-dimensional fluorescence spectroscopy (excitation-emission-matrix spectra, 3D-EEMs) combined with PARAFAC (parallel factor) analysis. The results show that the COD/DOC of the influent in WWTPs in five industrial parks ranged from 3.74 to 8.05, and the aromatization degree of the organic compounds in the influent was higher than that of the municipal wastewater treatment plant. There was more protein-like substance than humic substance-like substance and lower humification degree in the fluorescence organics along the process of WWTPs in all industrial parks. The DOM resource was mainly affected by biological resource. For WWTPs, the reduction of tryptophan-like protein and humic-like organic matter was significant (21%~43%), but the decrease of SMP-like organic matter was weak (0%~3%). The persistent DOMs in the effluent of WWTPs were tryptophan-like protein (Ex/Em = 235 nm/335 nm; Ex/Em = 235 nm/340 nm) and SMP-like fluorescence (Ex/Em = 285 nm/315 nm; Ex/Em = 290 nm/320 nm). This research can provide a scientific reference for further understanding the variation characteristics of DOM along WWTPs in industrial parks.
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