Characterization and electro-oxidation of dissolved organic matters in desalted wastewater

被引：0
|
作者：
Zhang H. [1 ]
Liu T. [2 ]
Wang Y. [1 ]
Liu G. [1 ]
Xu L. [1 ]
Xie Y. [1 ]
Zhai X. [1 ]
机构：
[1] CNPC Research Institute of Safety and Environmental Technology, Beijing
[2] System Research Institute of Eco-Tech & Eco-Ei, Ltd., MCC Group, Beijing
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2023年 / 37卷 / 06期
关键词：
desalter wastewater; dissolved organic matter; electro-oxidation; kinetics; resin adsorption chromatography;
D O I：
10.3969/j.issn.1003-9015.2023.06.015
中图分类号：
学科分类号：
摘要：
To control the effect of dissolved organic matters (DOM) in desalted wastewater onto sewage treatment systems, resin adsorption chromatography, ultraviolet visible spectroscopy (UV-Vis), Fourier infrared spectroscopy (FTIR) and electro-oxidation were employed for system analysis. The results show that DOM in the desalted wastewater was mainly composed of sugars, phenols, lipids, organic acids, and aromatic organics after coagulation treatments. Hydrophobic organic matters accounted for 58.3%. The concentration of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), and total nitrogen (TN) gradually decreased with the increase of electro-oxidation time, while the concentration of nitrate nitrogen increased. The first-order kinetics rate coefficients declined in the order of kNH3-N> kNO3-N > kTN> kCOD. When the concentration of Cl- was increased to 900 mg.L-1, the removal rate coefficient of COD increased from 0.004 1 min-1 to 0.008 0 min-1. Nitrogen and carbon containing pollutants in the desalted wastewater can be effectively degraded in the electro-oxidation unit. © 2023 Zhejiang University. All rights reserved.
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页码：998 / 1006
页数：8
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