Pavas Edison Gil, Gómez-García Miguel Angel
GIPAB: Grupo de Investigación en Procesos Ambientales y Biotecnológicos, Departamento de Ingeniería de Procesos, Universidad EAFIT, Carrera 49 #7 sur 50, Medellín, Colombia.
Water Sci Technol. 2009;59(7):1361-9. doi: 10.2166/wst.2009.114.
This work deals with 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 achieve the degradation of dyes mixture and organic matter in the wastewater. A multifactorial experimental design was proposed, including as experimental factors the following variables: pH, and the concentration of both catalyst (TiO(2)) and hydrogen peroxide (H(2)O(2)). According to the obtained results, at the optimized variables values, it is possible to reach a 99% reduction of dyes, a 76.9% of mineralization (TOC) and a final biodegradability of 0.834. Kinetic analysis allows proposing a pseudo first order reaction for the reduction, the mineralization, and the biodegradation processes.
这项工作涉及花卉染色过程产生的废水处理。在麦德林（哥伦比亚）附近一些种植花卉的地方案例中，发现废水颜色是达到当地污水排放标准的主要问题之一。通过光降解过程（包括光催化）处理废水，以实现废水中染料混合物和有机物的降解。提出了一种多因素实验设计，包括以下变量作为实验因素：pH值、催化剂（TiO₂）浓度和过氧化氢（H₂O₂）浓度。根据所得结果，在优化的变量值下，有可能实现染料减少99%、矿化率（TOC）达到76.9%以及最终生物降解性为0.834。动力学分析允许为还原、矿化和生物降解过程提出拟一级反应。
