期刊
WATER RESEARCH
卷 44, 期 18, 页码 5385-5397出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2010.06.033
关键词
Adsorption-photocatalysis hybrid treatment process; Degradation Clay adsorbent; TiO2; Wastewater reclamation
资金
- Australian Research Council [LP0562076]
- Australian Water Quality Centre through the Water Environmental Biotechnology Laboratory (WEBL) at the University of Adelaide
- Australian Research Council [LP0562076] Funding Source: Australian Research Council
In this study, two of our recently developed laboratory scale wastewater treatment systems, fluidised-bed reactor (FBR) using formulated clay mixture absorbents (clay-FBR adsorption) and an annular slurry photoreactor (ASP) using TiO2 impregnated kaolin catalysts (TiO2-K-ASP) were integrated as an adsorption-photocatalysis hybrid process to treat municipal wastewater as alternative secondary and tertiary treatment for wastewater reclamation. Primary effluent from sewage and secondary effluent from a membrane bioreactor treatment process were used to assess chemical removal capabilities of the FBR and ASP systems, and the hybrid process. The formulated clays-FBR system demonstrated the prevailing removal efficiency toward PO, NO and suspended solids. The TiO2-K-ASP showed superior degradation of dissolved organic content; while the presence of inorganic ions caused a detrimental effect on its performance. The integration of the adsorption and degradation system as a hybrid treatment process resulted in a synergetic enhancement for the chemical removal efficiency. Complete elimination of PO43- content was obtained in the adsorption stage; while 30% and 65% NO3- removal were obtained from the hybrid treatment of the primary and secondary effluents, respectively. The corresponding COD reduction during the photodegradation was further investigated by the high-performance size exclusion chromatography technique, where it revealed the shift of apparent molecular weight of the dissolved organic contaminants toward the smaller region. This present study demonstrated that this adsorption-photocatalysis hybrid technology can be used as a feasible alternative treatment process for wastewater reclamation. (C) 2010 Elsevier Ltd. All rights reserved.
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