This study investigates the treatment of the wastewaters resulting from the process of dyeing flowers. In some local cases for growing flowers near to Medellín, Colombia, wastewater color was found to be one of the main problems in meeting local effluent standards. Wastewaters were treated by photodegradation process (which includes photocatalysis) to obtain the degradation of the mixture of dyes and organic matter in the wastewater. A multifactorial experimental design was proposed, including as experimental factors three variables: pH, catalyst concentration (TiO₂) and hydrogen peroxide concentration (H₂O₂). Results reveal that, at optimised variables values, it is possible to reach a 99% reduction of dyes, a 76,9% of mineralization (TOC) of and a final biodegradability of 0,834. Kinetics analysis allows proposing a pseudo first order reaction for reduction, mineralization of biodegradability process.

1. FULLTEXT: Optimization of the decolorisation parameters of wastewaters resulting from the process of dyeing flowers, Microsoft Office Document, 0.4MB

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