Membrane crystallization of valuable salts from waste streams
(2017) International Conference on Membrane Science 2017 — Location: Paris, France (11.September.2017)
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- Abstract
- Crystallization is an example of the technological evolution of a unit from the conventional operation to the high-efficiency process. Crystallization is a widely used unit operation for the separation and/or purification of crystalline solid products. Membrane crystallization aims at reaching the production or recovery of crystals by means of incorporating the novelty of the membrane technology instead of the traditional equipment. The removal and reduction of both anthropogenic emissions of greenhouse gases and pollutant disposals is one of the challenges of humanity must face. Membrane crystallization is presented as a promising technology to solve this issue. It can be used alone or in combination with other technologies, leading to reach synergy effects. In this work, synthetic salt aqueous solutions (Na2CO3, Na2SO4 and KNO3) has been treated using osmotic membrane distillation aiming to crystallize the salts.The influence of concentrations, flow rates and impurities were studied in order to demonstrate the potential of this technique, not only for crystal production but also to recover valuable compounds from waste waters. Results of transmembrane fluxes, mass transfer coefficients and crystal morphology proved the technical feasibility, making this technology an interesting alternative because of its low energy consumption, the high surface area per volume and its easy scale-up.
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Ruiz Salmon, I., Luis Alconero, P., & Clérin, C. (2017). Membrane crystallization of valuable salts from waste streams. International Conference on Membrane Science 2017, Paris, France. https://hdl.handle.net/2078.5/173149