Bench and pilot scale performance assessment of recycled membrane converted from old nanofiltration membranes

Environmental Technology
Eduardo Coutinho de PaulaMíriam Cristina Santos Amaral

Abstract

Recycling of end-of-life polyamide-based thin film composite (TFC) membranes is gaining interest in academic and industrial contexts. The effects of chlorine exposure on the performance of polyamide membranes result in an increase in membrane permeability, whereas the solute rejection decreases. Therefore, the controlled chemical conversion of old reverse osmosis (RO) membranes has been reported by some previous papers. The objectives of this study were to assess recycling of old nanofiltration (NF) membrane, to assess the performance of the recycled membranes for a river water treatment application, and to conduct preliminary cost evaluations. Recycling technique consisted of exposing the membrane to a sodium hypochlorite solution in order to remove its polyamide layer and conversion to a low-pressure membrane. The work conducted bench scale and long-time pilot tests, and the recycled membranes showed a low fouling tendency. The difference between some results in bench- and pilot scale underscores the importance of evaluating design parameters using pilot scale units. Based on the cost analysis, the total cost of chemical recycling end-of-line NF membranes for a river water treatment is approximately 1.1% of the cost of using ...Continue Reading

References

Jan 6, 2010·Journal of Hazardous Materials·Juan L AceroFernando Teva
Dec 9, 2010·Journal of Environmental Management·Fenglian Fu, Qi Wang
Jan 10, 2012·Environmental Science & Technology·Van Thanh DoJames O Leckie
Jan 18, 2017·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Eduardo Coutinho de Paula, Míriam Cristina Santos Amaral
Aug 2, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Eduardo Coutinho de PaulaMíriam Cristina Santos Amaral

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Citations

Feb 25, 2020·Environmental Technology·Judit Ribera-PiXavier Martínez-Lladó
Oct 11, 2020·Environmental Science and Pollution Research International·Jawwad Ahmed, Yousuf Jamal

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