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Dynamic transport and reaction model for azo dye removal in a UAFB reactor
Affiliation:1. Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703 Sanfandila, Pedro Escobedo, Qro., Mexico;2. Instituto Tecnológico de Celaya, Departamento de Ingeniería Química y Bioquímica, Ave. Tecnológico y Antonio García Cubas S/N, 38010 Celaya, Gto., Mexico;1. Department of Naval Architecture and Ocean Engineering, Pusan National University, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, Republic of Korea;2. Central Research Institute, Samsung Heavy Industries Co., Ltd., Seongnam, Republic of Korea;1. Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal;2. Instituto de Ciência e Engenharia de Materiais e Superficies (ICEMS), Instituto Superior Técnico, Universidade Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;3. Institute for Biotechnology and Bioengineering (IBB), Centre for Biological and Chemical Engineering, Department of Bioengineering, Instituto Superior Técnico, Universidade Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;4. Faculdade de Engenharia, Universidade Lusófona de Humanidades e Tecnologias, 1749-024 Lisboa, Portugal;1. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China;2. Beijing Water Business Doctor Co. Ltd., Beijing 100875, China;1. Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Henry Dyer Building, 100 Montrose Street, G40LZ Glasgow, UK;2. Merchant Marine College, Shanghai Maritime University, China;1. Key Laboratory of Marine Technology and Control Engineering Ministry of Communications, Shanghai Maritime University, Shanghai, China;2. College of Automation, Harbin Engineering University, Harbin, China;3. Industrial Control Center, University of Strathclyde, Glasgow, UK
Abstract:An Upflow Anaerobic Fixed Bed (UAFB) reactor packed with activated carbon was used to remove the azo dye Reactive red 272. The biomass grown on the activated carbon surface was composed of an adapted consortium of microorganisms. Residence time distribution test indicated that the reactor was a plug flow behavior. A dynamic mathematical model is presented for dye flux along the reactor and within the bioparticles composed of two regions: activated carbon core and biofilm. The model considers that the reaction is performed in the biofilm and in the liquid phase and includes dye transport by dispersion and diffusion. The concentration profile within the bioparticles changes with reactor height and time as the equilibrium is achieved. Changes in dye concentrations affect the concentration profile in the reactor and reduce the removal efficiency. The effectiveness factor depends on the reactor height and on the dye concentration at the inlet.
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