Application of integrated ozone and granular activated carbon for decolorization and chemical oxygen demand reduction of vinasse from alcohol distilleries. (1st April 2016)

• Record Type: Journal Article
• Authors: Hadavifar, Mojtaba; Younesi, Habibollah; Zinatizadeh, Ali Akbar; Mahdad, Faezeh; Li, Qin; Ghasemi, Zahra
• Is Part Of: Journal of environmental management. Volume 170(2016)
• Page Start: 28
• Page End: 36
• Publication Date: 2016-04-01
• Subjects: Vinasse -- Cane molasses -- Wastewater treatment -- Ozonation -- Synergistic effect; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2016.01.009
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: This study investigates the treatment of the distilleries vinasse using a hybrid process integrating ozone oxidation and granular activated carbons (GAC) in both batch and continuous operation mode. The batch-process studies have been carried out to optimize initial influent pH, GAC doses, the effect of the ozone (O3 ) and hydrogen peroxide (H2 O2 ) concentrations on chemical oxygen demand (COD) and color removal of the distilleries vinasse. The continuous process was carried out on GAC and ozone treatment alone as well as the hybrid process comb both methods to investigate the synergism effectiveness of the two methods for distilleries vinasse COD reduction and color removal. In a continuous process, the Yan model described the experimental data better than the Thomas model. The efficiency of ozonation of the distilleries vinasse was more effective for color removal (74.4%) than COD removal (25%). O3 /H2 O2 process was not considerably more effective on COD and color removal. Moreover, O3 /GAC process affected negatively on the removal efficiency by reducing COD and color from distilleries vinasse. The negative effect decreased by increasing pH value of the influent. Highlights: The effect of O3 /GAC on COD and color removal of vinasse was investigated. The synergistic effect of GAC and O3 on COD reduction of vinasse was studied. Integrated O3 /GAC process affected negatively on COD and color removal from vinasse. O3 /GAC process did not show a synergistic effect on color and COD removal.