Pretreatment of Color Filter Wastewater towards Biodegradable by Fresnel-Lens-Assisted Solar TiO2 PhotocatalysisReportar como inadecuado




Pretreatment of Color Filter Wastewater towards Biodegradable by Fresnel-Lens-Assisted Solar TiO2 Photocatalysis - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

International Journal of PhotoenergyVolume 2012 2012, Article ID 387052, 8 pages

Research ArticleDepartment of Safety, Health, and Environmental Engineering, National United University, Miao-Li 360, Taiwan

Received 20 July 2012; Revised 16 August 2012; Accepted 16 August 2012

Academic Editor: Jiaguo Yu

Copyright © 2012 Wen-Shiuh Kuo and Min-Tian Li. 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

The pretreatment of color filter wastewater towards biodegradable by Fresnel-lens-enhanced solar TiO2 photocatalytic process was investigated. The experimental design of response surface methodology RSM was employed to assess the effect of critical process parameters including initial pH, TiO2 dosage, and reaction time on pretreatment performance in terms of BOD5-COD, COD and TOC removal efficiency. Appropriate reaction conditions were established as an initial pH of 7.5, a TiO2 dosage of 1.5 g-L with a reaction time of 3 h for increasing the BOD5-COD ratio to 0.15, which implied that the treated wastewater would be possibly biodegradable. Meanwhile, the efficiency of COD and TOC removals reached 32.9% and 24.4%, respectively. With the enhancement of Fresnel lens, the required reaction time for improving the biodegradability of wastewater to 0.15 was 1 h only. Moreover, the efficiency of COD and TOC removals was promoted to 37.4% and 25.8%, respectively. This could be mainly due to the concentrated effect of Fresnel lens for solar energy, including an increase of 2 times of solar irradiation and a raising of 15–20°C of wastewater temperature. Consequently, solar TiO2 photocatalytic process with the use of a PMMA Fresnel lens could offer an economical and practical alternative for the pretreatment of industry wastewater containing diversified biorefractory pollutants with a high concentration of COD such as color filter wastewater.





Autor: Wen-Shiuh Kuo and Min-Tian Li

Fuente: https://www.hindawi.com/



DESCARGAR PDF




Documentos relacionados