Optimization of Heterogeneous Photosensitized Oxidation for Winery Effluent Treatment

In this study, the heterogeneous photosensitized oxidation treatment of winery effluents was optimized using chitosan carriers immobilized with Zn(II) Phthalocyanine tetrasulfonic acid. The influence main operating parameters such as initial pH, aeration flow rate, photocatalyst load, and concentration photosensitizer used in photocatalysts’ preparation investigated. Results for chemical oxygen demand (COD) phenolic content (TPh) removals are presented each tests performed. Best reductions were obtained after 30 min natural sunlight at an pH 4.0 2.8 L/min since it allowed 45% COD 73% (TPh). addition, possibility reusing photocatalysts during several cycles also assessed, where acidic their reuse, being only value studied leaching not observed. these conditions, same reused six reaction cycles, efficiency started to decrease third use. Thus, a greater mass contributed superior reduction organic matter. results show that radiation energy source is interesting approach obtaining reusable water from effluents.