dc.contributorMiriam Cristina Santos Amaral
dc.contributorLisete Celina Lange
dc.contributorCristiano Piacsek Borges
dc.creatorLuiza de Barros Grossi
dc.date.accessioned2019-08-10T03:45:03Z
dc.date.accessioned2022-10-03T23:53:33Z
dc.date.available2019-08-10T03:45:03Z
dc.date.available2022-10-03T23:53:33Z
dc.date.created2019-08-10T03:45:03Z
dc.date.issued2018-03-20
dc.identifierhttp://hdl.handle.net/1843/BUBD-AYLPTZ
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3829575
dc.description.abstractThe continued pollution of water bodies and the possibility of acute pollution events such as the collapse of tailing dams are problems faced by the modern society. Aside the environmental effects of it, this severe contamination can difficult or even impair the surface water treatment to public supply, which leads to a state of emergency during certain situations. As a short-term solution to at least diminish the chaos provoked by the water shortage, the establishment of advanced water treatment routes based on sustainable principles is a feasible alternative. Membrane distillation (MD) is a technology reported by the literature as a robust and low energy demand (when associated to alternatives sources of heating) separation process. Having in sight the Brazilian context of wide solar availability and the potentiality of solar-driven membrane distillation systems, this work aimed to evaluate technical aspects of MD treating surface water contaminated with tailings from an iron mining dam. Aspects such as feed pretreatment, temperature and flow rate were assessed in bench-scale, as well as the impacts of different cleaning agents and membrane ageing. In these cases, it was observed that for feeds whose turbidity was above 300 NTU, a pretreatment should be carried out, and ultrafiltration is the most suitable technology from the technical point of view. In addition, at 70°C and 0.18 m/s, the system presented its best energy efficiency without compromising the permeate quality. Regarding the cleaning agents, deionized water at 60°C demonstrated the best cleaning efficiency among the agents tested, being able to restore the membrane initial permeate flux without compromising its integrity. Furthermore, the mass and heat phenomena that took place in the system were mathematically modelled, in order to assist the design of a semi-pilot membrane distillation module. The models presented an accuracy of at least 80%, and similar results were found the the semipilot simulation, which indicates that the model remained valid for a module with a total active area of 0.3m2
dc.publisherUniversidade Federal de Minas Gerais
dc.publisherUFMG
dc.rightsAcesso Aberto
dc.subjectBarragem de minério de ferro
dc.subjectCondições operacionais
dc.subjectDesign de módulo
dc.subjectVida útil
dc.subjectÁguas superficiais
dc.subjectDestilação por membranas
dc.titleEvaluation of membrane distillation for the treatment of surface water during emergency situations
dc.typeDissertação de Mestrado


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