Sancho-Seuma, L. (Luis)

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    Mathematical model for optimal agri-food industry residual streams flow management: A valorization decision support tool.
    (MDPI, 2024-09) Jaray-Valdehierro, S. (Sofía); Fernández-Arévalo, T.(Tamara); Villar-Rosety, F.M. (Fernando M.); Barasoain-Echepare, I. (Iñigo); Sancho-Seuma, L. (Luis); Zárraga-Rodríguez, M. (Marta de); Besga-Oyanarte, L. (Leire); Insausti-Sarasola, X. (Xabier); Ayesa-Iturrate, E. (Eduardo); Podhorski, A. (Adam); Gutiérrez-Gutiérrez, J. (Jesús)
    We present a mathematical model for agri-food industry residual streams flow management, which serves as a decision support tool for optimizing their valorization. The aim is to determine, under a cost-benefit analysis approach, the best strategy at a global level. The proposed mathematical model provides the optimal valorization scenario, namely the set of routes followed by agri-food industry residual streams that maximizes the total profit obtained. The model takes into account the complete stoichiometry of the residual stream at each step of the valorization route. Furthermore, the model allows for the calculations of different scenarios to support decision-making. The proposed approach is illustrated through a case study using a real-case network of a region. The case study bears evidence that the use of the model can lead to significant profit increases compared to those obtained with current practices. Moreover, notable profit improvements are obtained in the case study if the selling price of all the value-added products considered increases or if the processing cost of the animal feed producer decreases. Therefore, our model enables the detection of key factors that influence the optimal strategy, making it a powerful decision-support tool for optimizing the valorization of agri-food industry residual streams.
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    Ultraviolet - Chlorine combined treatment efficiency to eliminate Naegleria fowleri in artificial surf lagoons
    (2022) Reyes-Batle, M. (María); Lorenzo-Morales, J. (Jacob); Rizo-Liendo, A. (Aitor); Sancho-Seuma, L. (Luis); Pinero, J.E. (José E.); Sifaoui, I. (Inés); Urruticoechea, A. (Andoni); Arberas-Jiménez, I. (Iñigo)
    Naegleria. fowleri, a protozoa belonging to the free-living amoeba group, is the causative agent of a central nervous system affecting disease that is fatal in more than the 95% of the reported cases. This parasite can be found in warm water bodies such as lakes, rivers or inadequately disinfected swimming pools. On the other hand, chlorination and UV light treatment are two of the most extensively used disinfection methods in recreational water facilities. In this study the effect of chlorination and UV light on N. fowleri trophozoites was studied in a close water circuit with the aim to assess the efficacy of this disinfection methods in large pools. The obtained results showed that the chlorination was able to decrease the number of viable cells despite the elimination was not totally achieved. Nonetheless, the combination of the UV light with the chlorination allowed the complete removal of the N. fowleri trophozoites from the water in experimental testing conditions.
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    Influence of salt and temperature in the growth of pathogenic free-living amoebae.
    (Frontiers media SA, 2024) Lorenzo-Morales, J. (Jacob); Sancho-Seuma, L. (Luis); Pinero, J.E. (José E.); Chao-Pellicer, J. (Javier); Sifaoui, I. (Inés); Urruticoechea, A. (Andoni); Rodríguez-Expósito, R. (Rubén); Arberas-Jiménez, I. (Iñigo)
    Introduction Free-living amoebae are an extensive group of protistans that can be found in a wide variety of environments. Among them, the Acanthamoeba genus and Naegleria fowleri stand out as two of the most pathogenic amoebae and with a higher number of reported cases. N. fowleri is mainly found in warm freshwater water bodies whereas amoebae of the Acanthamoeba genus are broadly distributed through natural and anthropogenic environments. In this regard, the management and the control of the amoebic populations in swimming pools has become a major public health challenge for institutions.Methods The aim of this work was to evaluate the growth pattern of trophozoites of A. griffini and N. fowleri at different temperatures and salt concentrations.Results and discussion Our results showed that A. griffini resisted a higher concentration of salt than N. fowleri. Moreover, no trophozoites could withstand the salt levels of the sea in in vitro conditions. This work supports the contention that salinity could represent an important and useful tool for the control of the most pathogenic amoebic populations in recreational water bodies.