化工进展 ›› 2022, Vol. 41 ›› Issue (4): 2202-2208.doi: 10.16085/j.issn.1000-6613.2021-0905

• 资源与环境化工 • 上一篇    下一篇

炼化含盐污水处理全过程有机污染物降解特征

寇悦1(), 陈宇2, 叶黄凡1, 王庆宏1, 陈春茂1()   

  1. 1.中国石油大学(北京)化学工程与环境学院,石油石化污染物控制与处理国家重点实验室,北京 102249
    2.中国海洋石油集团有限公司,北京 100010
  • 收稿日期:2021-04-27 修回日期:2021-07-24 出版日期:2022-04-23 发布日期:2022-04-25
  • 通讯作者: 陈春茂 E-mail:kouyue1116@126.com;c.chen@cup.edu.cn
  • 作者简介:寇悦(1994—),女,博士研究生,研究方向为环境分析化学。E-mail:kouyue1116@126.com
  • 基金资助:
    国家自然科学基金面上项目(21776307)

Organics degradation characteristics along refining saline wastewater treatment processes

KOU Yue1(), CHEN Yu2, YE Huangfan1, WANG Qinghong1, CHEN Chunmao1()   

  1. 1.State Key Laboratory of Petroleum Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China
    2.China National Offshore Oil Corporation, Beijing 100010, China
  • Received:2021-04-27 Revised:2021-07-24 Online:2022-04-23 Published:2022-04-25
  • Contact: CHEN Chunmao E-mail:kouyue1116@126.com;c.chen@cup.edu.cn

摘要:

某重质油炼化企业采用“物化单元(隔油+气浮)+曝气生物滤池(biofilter,BAF)+水解酸化(hydrolysis acidification,HA)+缺氧/好氧(anoxic/oxic,A/O)+好氧-膜生物反应器(oxic-membrane bioreactor,O-MBR)+催化臭氧氧化(catalytic ozonation,COP)”工艺处理含盐污水。本文采用GC-MS结合FT-ICR MS高等仪器的分析手段,对污水处理工艺全过程的有机污染物降解特征进行了深入研究。发现BAF单元主要去除的是小分子有机酸类、酯类和醛酮类等易降解化合物;HA单元基本未发挥降解作用;A/O单元能大幅度去除O2类化合物,并能完全降解N1O2S1类化合物;O-MBR单元未能完全降解的O3S1类和N1O3类化合物在COP单元被完全矿化;最终出水残留COD的构成主要是大分子饱和脂肪酸和高缩合度环烷酸类化合物。本文研究成果可为重质油炼化污水处理工艺的评价与优化提供依据。

关键词: 重质油, 含盐污水, 有机污染物, 降解特征, 傅里叶变换离子回旋共振高分辨质谱

Abstract:

The successive processes including physicochemical units (oil separation+air flotation)+biofilter (BAF)+hydrolysis acidification (HA)+anoxic/oxic (A/O)+oxic-membrane bioreactor (O-MBR)+catalytic ozonation (COP) were used to treat heavy oil refining saline wastewater. The organics degradation characteristics along treatment processes were comprehensively analyzed by GC-MS combined FT-ICR MS. Small molecular organic acids, esters, aldehydes and ketones were dominantly degraded by BAF. HA showed very weak degradation towards organics. Most O2 species and all N1O2S1 species were degraded by A/O. The O3S1 and N1O3 species, penetrated from O-MBR, were completely mineralized by COP. The residual COD in the final effluent mainly were macromolecular saturated fatty acid and naphthenic acid with high unsaturation degree. The results may guide the assessment and optimization of heavy oil refinery wastewater treatment plant.

Key words: heavy oil, saline wastewater, organics, degradation characteristics, Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS)

中图分类号: 

  • TE991