Abstract
UV/H2O2 process and TiO2-based photocatalysis were studied in the present work. The effectiveness of these methods was tested in the treatment of effluents taken from handicraft factories. Microorganisms, dyes, and different organic pollutants were detected in the industrial effluents. The experimental procedure for the wastewater treatment was carried out in a patented sunlight reactor on a pilot plant scale. From this study, UV/H2O2 was found to be the best treatment for dye elimination. The optimal peroxide dosage for the degradation of dyes and the elimination of bacteria was 0.07 M. In this case, 70.80% of discoloration was achieved after 7 h of sunlight exposure, under an average sunlight intensity of 3.42 W/m2. The photocatalytic treatment based on TiO2 achieved the highest elimination of coliform bacteria and the lowest TOC value; however, the presence of this material in the reactor had a detrimental effect on the overall elimination of dyes. A combination of both UV/H2O2 and TiO2 treatments significantly improves the dyes discoloration, the elimination of bacteria, and the organic compounds degradation. Some of the results of this study were presented at the 4th Congreso Colombiano de Procesos Avanzados de Oxidación, 4CCPAOx.
Highlights
It is possible to note the bactericidal effect of direct sunlight, where the total coliform bacteria content decreases almost 20%
It is important to note that different tests Figure were performed on the a laboratory scale whichpercentage had similaras results to those observed at 2 represents bacteria elimination a function of the reaction the pilot plant effectthe of bactericidal
UV/H2 O2 and TiO2 photocatalysis was successfully tested on a pilot plant scale in the treatment of industrial wastewater, showing the potential of Advanced oxidation processes (AOPs) in environmental remediation
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Wastewater coming from small-scale industries currently represents an important source of environmental pollution in Latin American countries. These effluents must be treated before releasing them into the drain, but in the real context of small industries, it is not a priority [1]. Many conventional treatments for industrial effluents can be very expensive [2] and in some cases not effective enough
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