Hydraulic Energy Generation for RO (Reverse Osmosis) from PRO (Pressure Retarded Osmosis)

Ivonne Tshuma, Ralf Cord-Ruwisch, Wendell Ela

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Although reverse osmosis (RO) is currently the most energy efficient, widely used, desalination technology, it still requires a great deal of energy to create the high pressure necessary to overcome the osmotic pressure of seawater. Pressure retarded osmosis (PRO), on the other hand, utilizes the salinity gradient between two solutions of different salt content to produce pressure, which can subsequently be used to generate electrical energy. The intended outcome of this study is a PRO-RO desalination system, where the PRO unit is directly hydraulically linked to a RO unit such that the pressure produced by PRO is transferred to RO to produce permeate. By utilizing the pressure produced in PRO to power RO, external energy inputs can be substituted. This is particularly significant in remote, off-grid, decentralized locations that have limited access to fresh water. The main objective of this paper is to introduce a RO driven by PRO technology and present ongoing work on a PRO stand-alone process.

Original languageEnglish (US)
Title of host publicationProceedings of 2020 4th International Conference on Green Energy and Applications, ICGEA 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages139-142
Number of pages4
ISBN (Electronic)9781728160214
DOIs
StatePublished - Mar 2020
Externally publishedYes
Event4th International Conference on Green Energy and Applications, ICGEA 2020 - Singapore, Singapore
Duration: Mar 7 2020Mar 9 2020

Publication series

NameProceedings of 2020 4th International Conference on Green Energy and Applications, ICGEA 2020

Conference

Conference4th International Conference on Green Energy and Applications, ICGEA 2020
Country/TerritorySingapore
CitySingapore
Period3/7/203/9/20

Keywords

  • Component
  • Concentration polarisation
  • Power density
  • Pressure retarded osmosis
  • Reverse osmosis
  • Water flux

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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