SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (2): 444-451.DOI: 10.1016/j.cjche.2018.04.030

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Characterization and analysis of petrochemical wastewater through particle size distribution, biodegradability, and chemical composition

Xiaoqiang Jia1,2,3, Dayao Jin1, Chen Li1, Wenyu Lu1,2,3   

  1. 1 Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Key Laboratory of Systems Bioengineering, Tianjin University, Tianjin 300072, China;
    3 Synthetic Biology Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
  • 收稿日期:2018-01-18 修回日期:2018-04-18 出版日期:2019-02-28 发布日期:2019-03-18
  • 通讯作者: Wenyu Lu
  • 基金资助:

    Supported by the National Basic Research Program of China (2014CB745100), the National Natural Science Foundation of China (21576197), and the Tianjin Key Research & Development Program (16YFXTSF00460)

Characterization and analysis of petrochemical wastewater through particle size distribution, biodegradability, and chemical composition

Xiaoqiang Jia1,2,3, Dayao Jin1, Chen Li1, Wenyu Lu1,2,3   

  1. 1 Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Key Laboratory of Systems Bioengineering, Tianjin University, Tianjin 300072, China;
    3 Synthetic Biology Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
  • Received:2018-01-18 Revised:2018-04-18 Online:2019-02-28 Published:2019-03-18
  • Contact: Wenyu Lu
  • Supported by:

    Supported by the National Basic Research Program of China (2014CB745100), the National Natural Science Foundation of China (21576197), and the Tianjin Key Research & Development Program (16YFXTSF00460)

摘要: The centralized treatment method is a widely used form of wastewater treatment that tends to be less effective at removing toxic substances. Therefore, a detailed analysis of the composition of wastewater can provide important information for the design of an effective wastewater treatment process. The objective of this paper was to investigate particle size distribution (PSD), biodegradability, and the chemical composition of the petrochemical wastewater discharges. For this purpose, this project selected the petrochemical wastewater and treated wastewater of China National Offshore Oil Corporation Zhongjie Petrochemical Co, Ltd. as the analysis objects. The step-by-step filtration method, along with a molecular weight classification method, was selected to build the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) fingerprints of petrochemical wastewater and treated wastewater. The results showed that the main pollutants were settleable particles in petrochemical wastewater, which contributed to over 54.85% of the total COD. The colloidal particles with particle sizes in the range of 450-1000 nm had the highest COD value in the treated wastewater, which contributed 34.17% of the total COD of treated wastewater. The results of the BOD analysis showed that the soluble fractions were the main reason that treated wastewaters did not meet the treatment standards. Tests on the organic compounds in petrochemical wastewater found that there were mainly linear paraffins, branched paraffins, benzene series compounds, and some plasticizers in the influent of the petrochemical wastewater. The most abundant pollutants in treated petrochemical wastewater were the adjacent diisobutyl phthalate and the linear alkanes. Fourier transform infrared (FTIR) transmission spectroscopy analysis showed that the settleable particles of petrochemical wastewater and membrane bioreactor (MBR)-treated wastewater contained multiple types of organic substances. The results also indicated that removing the oil-settleable substances, the colloidal particles (450-1000 nm), and the soluble organics will be necessary for the treatment of petrochemical wastewater.

关键词: Petrochemical wastewater, Gradient membrane separation, Chemical oxygen demand, Biochemical oxygen demand

Abstract: The centralized treatment method is a widely used form of wastewater treatment that tends to be less effective at removing toxic substances. Therefore, a detailed analysis of the composition of wastewater can provide important information for the design of an effective wastewater treatment process. The objective of this paper was to investigate particle size distribution (PSD), biodegradability, and the chemical composition of the petrochemical wastewater discharges. For this purpose, this project selected the petrochemical wastewater and treated wastewater of China National Offshore Oil Corporation Zhongjie Petrochemical Co, Ltd. as the analysis objects. The step-by-step filtration method, along with a molecular weight classification method, was selected to build the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) fingerprints of petrochemical wastewater and treated wastewater. The results showed that the main pollutants were settleable particles in petrochemical wastewater, which contributed to over 54.85% of the total COD. The colloidal particles with particle sizes in the range of 450-1000 nm had the highest COD value in the treated wastewater, which contributed 34.17% of the total COD of treated wastewater. The results of the BOD analysis showed that the soluble fractions were the main reason that treated wastewaters did not meet the treatment standards. Tests on the organic compounds in petrochemical wastewater found that there were mainly linear paraffins, branched paraffins, benzene series compounds, and some plasticizers in the influent of the petrochemical wastewater. The most abundant pollutants in treated petrochemical wastewater were the adjacent diisobutyl phthalate and the linear alkanes. Fourier transform infrared (FTIR) transmission spectroscopy analysis showed that the settleable particles of petrochemical wastewater and membrane bioreactor (MBR)-treated wastewater contained multiple types of organic substances. The results also indicated that removing the oil-settleable substances, the colloidal particles (450-1000 nm), and the soluble organics will be necessary for the treatment of petrochemical wastewater.

Key words: Petrochemical wastewater, Gradient membrane separation, Chemical oxygen demand, Biochemical oxygen demand