, Volume 23, Issue 4, pp 575–583 | Cite as

2,4,6-trichlorophenol (TCP) photobiodegradation and its effect on community structure

  • Yongming Zhang
  • Xuejing Pu
  • Miaomiao Fang
  • Jun Zhu
  • Lujun Chen
  • Bruce E. Rittmann
Original Paper


The mechanisms occurring in a photolytic circulating-bed biofilm reactor (PCBBR) treating 2,4,6-trichlorophenol (TCP) were investigated using batch experiments following three protocols: photodegradation alone (P), biodegradation alone (B), and intimately coupled photodegradation and biodegradation (P&B). Initially, the ceramic particles used as biofilm carriers rapidly adsorbed TCP, particularly in the B experiments. During the first 10 min, the TCP removal rate for P&B was equal to the sum of the rates for P and B, and P&B continued to have the greatest TCP removal, with the TCP concentration approaching zero only in the P&B experiments. When phenol, an easily biodegradable compound, was added along with TCP in order to promote TCP mineralization by means of secondary utilization, P&B was superior to P and B in terms of mineralization of TCP, giving 95% removal of chemical oxygen demand (COD). The microbial communities, examined by clone libraries, changed dramatically during the P&B experiments. Whereas Burkholderia xenovorans, a known degrader of chlorinated aromatics, was the dominant strain in the TCP-acclimated inoculum, it was replaced in the P&B biofilm by strains noted for biofilm formation and biodegrading non-chlorinated aromatics.


Biodegradation Biofilm Photolysis Community structure Trichlorophenol 



The authors acknowledge the financial support by the National Natural Science Foundation of China (50978164 and 50678102), the Special Foundation of Chinese Colleges and Universities Doctoral Discipline (20070270003), the Shanghai Leading Academic Discipline Project (S30406), and the United States National Science Foundation (0651794).


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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Yongming Zhang
    • 1
  • Xuejing Pu
    • 1
  • Miaomiao Fang
    • 1
  • Jun Zhu
    • 1
  • Lujun Chen
    • 2
  • Bruce E. Rittmann
    • 3
  1. 1.Department of Environmental Engineering, College of Life and Environmental ScienceShanghai Normal UniversityShanghaiPeople’s Republic of China
  2. 2.School of EnvironmentTsinghua UniversityBeijingPeople’s Republic of China
  3. 3.Swette Center for Environmental Biotechnology, Biodesign InstituteArizona State UniversityTempeUSA

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