Effect of boron rejection and recovery rate on a single-pass design of SWRO using hybrid membrane inter-stage design (HID) concept

Doseon Han, Moonhyun Hwang, In S. Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Seawater reverse osmosis (SWRO) has been applied as a desalination method to provide potable water to regions under the stress of water shortages and is more effective than other desalination processes. However, specific energy consumption (SEC) must be considered in SWRO process design because of its energy intensive features. Hybrid membrane inter-stage design (HID) was examined to enhance the SEC efficiency of the reverse osmosis process. The additional removal of boron may improve the water quality by adding a second pass. However, this additional factor may increase costs. This study investigated a potential HID that satisfies water quality standards with single pass SWRO only. The element configuration for the HID was evaluated by changes in SEC, salt rejection, and boron rejection under general seawater quality conditions. Case studies were also conducted to estimate the energy efficiency of the HID under three feed conditions: high concentration and high temperature (Case 1); low concentration and high temperature (Case 2); and low concentration and low temperature (Case 3). The results showed HID application can save up to 0.41 kWh/m3 of SEC. Temperature is a more important design factor than recovery rate for HID application.

Original languageEnglish
Pages (from-to)215-223
Number of pages9
JournalDesalination
Volume404
DOIs
Publication statusPublished - 2017 Feb 17
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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