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Application of Heterogenous Catalysis with TiO2 Photo Irradiated by Sunlight and Latter Activated Sludge System for the Reduction of Vinasse Organic Load

引用

Engineering（科研） 2012年第11期4卷 746-760页

作者： Juliana Sanches Carrocci Rodrigo Yuji Mori Oswaldo Luiz Cobra Guimaraes Rodrigo Fernando dos Santos Salazar Marcos Fernandes de Oliveira Andre Luis de Castro Peixoto helcio jose izario filho Construfer Engenharia GuaratinguetaBrasil OXITENO TremembeBrasil Departamento Basico Escola de Engenharia de Lorena EEL/USPLorenaBrasil Departamento de Quimica Universidade Federal de Sao Carlos(UFSCar)Sao CarlosBrasil Unidade Cruz Alta Universidade Estadual do Rio Grande do Sul(UERGS)Cruz AltaBrasil DuPont do Brasil S/A GuarulhosBrasil Instituto Federal de Educacao Ciencia e Tecnologia(IFSP)CapivariBrasil Departamento de Engenharia Quimica Escola de Engenharia de Lorena EEL/USPLorenaBrasil

Vinasse is the main residue generated during alcohol, sugar and blue rum production by fermentation process. This residue is effluent that could cause serious environmental pollution due to high organic load when is not treated adequately. The aim of this work consists of evaluating the efficiency and application of heterogeneous photocatalysis with TiO2, followed by a biological treatment (activated sludge system) to reduce organic load in the referred effluent. Complete factorial designs indicated the best experimental conditions subsequent to photacatalytic and biological treatments providing a reduction of non-purgeable organic carbon (NPOC) as a variable response. After the photocatalytic process, the sample from the best experiment condition was treated by a biological process in order to verify the degradation efficiency of the effluent organic matter studied according to the hybrid system (Advanced Oxidation Process—Acti- vated Sludge System). This system, which presented more efficiency, had a photochemical treatment of 180 minutes carried out in aerated solutions, pH 9 and effluent in natura, while the biological treatment was performed at pH 8 and sludge concentration of 5 gL–1. The reduction of biochemical oxygen demand (BOD) was >80%.

关键词： Heterogenous Catalysis Activated Sludge Organic Load

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