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A new mathematical model to evaluate simazine removal in three different immobilized-biomass reactors

AuthorsMartin, M. ; Casasús, L.; Garbi, C.; Nande, M.; Vargas, R.; Robla, J. I.; Sánchez, M.; Allende, J. L.
Issue Date2008
CitationWater Research 42: 1035-1042 (2008)
AbstractA new mathematical model based on the cinetical Langmuir equation is developed to interpret and predict the effectiveness of simazine (SZ) removal in immobilized-biomass reactor (IBR), to consider herbicide-support affinity (Cx), and herbicide-cell affinity (Cy). Three solid supports: sepiolite monolith, granular sepiolite, and alginate were used in pilot-scale reactors that were inoculated with Klebsiella planticola DSZ. The abiotic process was analysed by measuring the SZ sorption capacity of the reactor supports. Sepiolite monolith showed the maximum value for herbicide-support affinity (28.02±0.9%). The effectiveness of the biotic process was estimated considering the formation of biomass and SZ biodegradation. Granular sepiolite showed either higher affinity with SZ and viability rate (0.90) throughout the process, and SZ removal rate was 3.39±0.06 mg/h. The mathematical model presented in this paper provides useful insights into the interpretation of experimental data as well as prediction for the implementation of biological reactors. © 2007 Elsevier Ltd. All rights reserved.
Identifiersdoi: 10.1016/j.watres.2007.09.026
issn: 0043-1354
Appears in Collections:(CENIM) Artículos
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