化工进展 ›› 2023, Vol. 42 ›› Issue (1): 457-468.DOI: 10.16085/j.issn.1000-6613.2022-0527

• 资源与环境化工 • 上一篇    下一篇

浸没式PAC-AMBRs系统中PAC缓解膜污染的研究进展

刘雅娟()   

  1. 山西大同大学化学与化工学院,山西 大同 037009
  • 收稿日期:2022-03-31 修回日期:2022-06-04 出版日期:2023-01-25 发布日期:2023-02-20
  • 作者简介:刘雅娟(1974—),女,博士,副教授,硕士生导师,研究方向为废水生物与膜处理。E-mail:dtdxliuyajuan@139.com
  • 基金资助:
    山西省回国留学人员科研项目(2017-108)

Research status of membrane fouling mitigation by PAC in submerged PAC-AMBRs

LIU Yajuan()   

  1. College of Chemistry and Chemical Engineering, Shanxi Datong University, Datong 037009, Shanxi, China
  • Received:2022-03-31 Revised:2022-06-04 Online:2023-01-25 Published:2023-02-20

摘要:

浸没式粉末活性炭-好氧膜生物反应器(powdered activated carbon-aerobic membrane bioreactors,PAC-AMBRs)是一种利用PAC吸附性、微生物降解性和膜分离特性的新型废水处理技术。本文重点分析了近20年来浸没式PAC-AMBRs系统直接投加PAC缓解膜污染机制的研究成果,探讨了PAC通过对污泥絮体和溶解性有机物的综合影响缓解膜污染的机制,分析了PAC投加量和补充率对膜污染的影响。通过分析可知PAC缓解膜污染是一个综合作用的结果。以PAC为载体形成的污泥絮体在膜表面形成结构疏松和抗压性强的滤饼层,不仅能有效降低滤饼层阻力(cake resistance,Rc),还可以作为自成型动态膜截留溶解性有机物和悬浮微生物等来减少此类污染物造成的膜污染。PAC通过吸附和/或表面附着的微生物降解溶解性有机物的协同作用降低其造成的过滤阻力。定期排出和补充一定量的PAC可以提高缓解膜污染的效率。

关键词: 粉末活性炭, 好氧膜生物反应器, 吸附, 微生物降解, 膜污染

Abstract:

The submerged powdered activated carbon-aerobic membrane bioreactors (PAC-AMBRs) are new wastewater treatment technology, which integrates PAC adsorption, microbial degradation, and membrane separation. This review focuses on the previously published research on the mechanism of directly adding PAC to the submerged PAC-AMBRs system to alleviate membrane fouling in the past 20 years. The membrane fouling mitigation mechanism of sludge flocs and dissolved organic matters by PAC is analyzed comprehensively. The effects of PAC dosage and replenishment rate on membrane fouling are discussed. It is concluded that the fouling mitigation by PAC is a comprehensive process. The cake layer formed by sludge flocs with PAC as a carrier had a loose structure and strong pressure resistance. It not only effectively reduces the cake resistance but also is used as a self-forming dynamic membrane, intercepting dissolves organic matter and suspends microorganisms and reducing membrane fouling. Dissolved organic matter is removed through the synergistic effect of PAC adsorption and/or microbial degradation on PAC, reducing membrane fouling and improving permeate flux. Regular discharge and supplement of a certain amount of PAC can improve the efficiency of fouling alleviation.

Key words: powdered activated carbon, aerobic membrane bioreactor, adsorption, microbial degradation, fouling

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn