NDLI: Integrated photocatalytic-biological reactor for accelerated 2,4,6-trichlorophenol degradation and mineralization

Content Provider	Springer Nature Link
Author	Zhang, Yongming Sun, Xia Chen, Lujun Rittmann, Bruce E.
Copyright Year	2011
Abstract	An integrated photocatalytic-biological reactor (IPBR) was used for accelerated degradation and mineralization of 2,4,6-trichlorophenol (TCP) through simultaneous, intimate coupling of photocatalysis and biodegradation in one reactor. Intimate coupling was realized by circulating the IPBR’s liquid contents between a TiO2 film on mat glass illuminated by UV light and honeycomb ceramics as biofilm carriers. Three protocols—photocatalysis alone (P), biodegradation alone (B), and integrated photocatalysis and biodegradation (photobiodegradation, P&B)—were used for degradation of different initial TCP concentrations. Intimately coupled P&B also was compared with sequential P and B. TCP removal by intimately coupled P&B was faster than that by P and B alone or sequentially coupled P and B. Because photocatalysis relieved TCP inhibition to biodegradation by decreasing its concentration, TCP biodegradation could become more important over the full batch P&B experiments. When phenol, an easy biodegradable compounds, was added to 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. Cl− was only partially released during P experiments (24%), and this corresponded to its poor mineralization in P experiments (32%). Thus, intimately coupled P&B in the IPBR made it possible obtain the best features of each: rapid photocatalytic transformation in parallel with mineralization of photocatalytic products.
Starting Page	189
Ending Page	198
Page Count	10
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	23
Issue Number	1
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-07-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Photocatalysis Biofilm Reactor Trichlorophenol Biodegradation Soil Science & Conservation Microbiology Waste Management/Waste Technology Geochemistry Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Terrestrial Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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