Membrane and Water Treatment

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Reuse of reverse osmosis membranes for wastewater treatment (Beni Saf Water Company)

  • Khadidja Benyahia (Department of Process and Materials Engineering, National Polytechnic School) ;
  • Mouhssin Khiari (Department of Process and Materials Engineering, National Polytechnic School) ;
  • Mourad Berrabah (Department of Process and Materials Engineering, National Polytechnic School)
  • Received : 2023.05.13
  • Accepted : 2024.09.05
  • Published : 2024.10.25
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Abstract

The current research project focuses on the feasibility of recycling and reusing utilized osmosis membranes from the Beni Saf water seawater desalination station in the province of Ain Temouchent. The composite Reverse Osmosis (RO) membrane, which is referenced BW30-400-FR and manufactured by Dow Filmtec TM, is used for all the tests. Three solvents are tested: potassium permanganate (KMnO4), sodium hydroxide (NaOH), hydrogen peroxide (H2O2), and the mixture of NaOH with KMnO4 for the degradation of the active layer of the RO membrane. A frontal filtration of wastewater using these modified membranes was carried out. An analysis of the physicochemical properties of the filtrate was performed using a spectrophotometer. The results of the frontal filtration performed under perpendicular pressure using a filtration ramp show that the membranes immersed in the NaOH and KMnO4 mixture for 24 hours produced a higher hydraulic flux compared to those immersed in NaOH and H2O2. At the end of the proposed treatment, the samples are analyzed by scanning electron microscopy (SEM) in addition to analyzing the clogging powder by EDX. The obtained results show the effectiveness of the proposed treatment for the degradation of the active layer in order to transform it into microfiltration and/or ultrafiltration.

Keywords

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