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International Journal of Photoenergy
Volume 2010, Article ID 146743, 10 pages
http://dx.doi.org/10.1155/2010/146743
Research Article

Design and Characterization of a Novel Rotating Corrugated Drum Reactor for Wastewater Treatment

Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada K1N 6N5

Received 15 August 2010; Revised 21 November 2010; Accepted 6 December 2010

Academic Editor: Vincenzo Augugliaro

Copyright © 2010 Sarah M. Meunier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel photoreactor system consisting of a TiO2-coated corrugated drum and a UV light source is experimentally characterized for the treatment of phenol-polluted wastewaters. The design incorporates periodic illumination and increased agitation through the introduction of rotation. The effects ofrent degrees and flat fins to increase surface area, varying rotational speed, initial pollutant concentration, and illumination intensities were studied. The corrugated and finned drums did not exhibit a critical rotational speed, indicating that there is excellent mass transfer in the system. A Langmuir-Hinshelwood kinetic analysis was applied to the degradation, and an average adsorption coefficient of 𝐾=0.120 L/mg was observed. The overall reaction rate increased with increasing surface area from 0.046 mg/L/min for the annular drum to 0.16 mg/L/min for the 40-fin drum. The apparent photonic efficiency was found to increase with increasing surface area at a faster rate for the corrugations than for the fin additions. The energy efficiency (EE/O) found for the drums varied from 380–550 kWh/m3, which is up to 490% more energy-efficient than the annular drum.