Arch-type feed spacer with wide passage node design for spiral-wound membrane filtration with reduced energy cost

Yu, Jia, Chen, Dengyue, Wu, Jun Jie, Wang, Bing and Field, Robert (2022) Arch-type feed spacer with wide passage node design for spiral-wound membrane filtration with reduced energy cost. Desalination, 540. p. 115980. ISSN 0011-9164

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A novel feed spacer for spiral-wound membrane modules is proposed. Based upon a continuous arch-type streamline frame two feed spacers with different node designs were constructed. In the first, Arch-Hole, two elliptic cylinders form a node zone with a passage. The other, named Arch, has a solid node. Their hydrodynamics, fouling and filtration performance were compared with a commercial design. This was a classic net-type spacer with nodes of relatively substantial size. All three were manufactured using 3D printing. Computational fluid dynamics simulation showed that the Arch-Hole design gives a more uniform velocity distribution with fewer dead zones. Subsequent evaluation of this design indicated less foulant accumulation as confirmed by optical coherence tomography and the evolution of channel pressure drop. Measured adenosine triphosphate and total organic carbon values for the module with this spacer were substantially lower than the corresponding values associated with the commercial design. Crucially with the Arch-Hole design, flux values remained higher than for the other two designs. Thus use of this spacer would minimize both capital and operational costs. Compared to the commercial one, use of the Arch-Hole design would reduce the energy cost of filtration significantly beyond the 69 % found for the application considered herein.

Item Type: Article
Additional Information: Funding information: This work was supported by two grants from National Natural Science Foundation of China (No. 52100047 and No. 21706221). RWF acknowledges the support provided by an APEX project on water reuse that has been supported by the Royal Society in partnership with the British Academy and the Royal Academy of Engineering together with generous support from the Leverhulme Trust.
Uncontrolled Keywords: Feed spacer, Computational fluid dynamics, Spiral-wound membrane, Fouling, Specific energy cost
Subjects: H300 Mechanical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Elena Carlaw
Date Deposited: 05 Aug 2022 14:33
Last Modified: 02 Aug 2023 08:00

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