Environmental and economic impacts of fertilizer drawn forward osmosis and nanofiltration hybrid system

Jung Eun Kim, Sherub Phuntsho, Laura Chekli, Seungkwan Hong, Noreddine Ghaffour, Tor Ove Leiknes, Joon Yong Choi, Ho Kyong Shon

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24 Citations (Scopus)

Abstract

Environmental and economic impacts of the fertilizer drawn forward osmosis (FDFO) and nanofiltration (NF) hybrid system were conducted and compared with conventional reverse osmosis (RO) hybrid scenarios using microfiltration (MF) or ultrafiltration (UF) as a pre-treatment process. The results showed that the FDFO-NF hybrid system using thin film composite forward osmosis (TFC) FO membrane has less environmental impact than conventional RO hybrid systems due to lower consumption of energy and cleaning chemicals. The energy requirement for the treatment of mine impaired water by the FDFO-NF hybrid system was 1.08 kWh/m3, which is 13.6% less energy than an MF-RO and 21% less than UF-RO under similar initial feed solution. In a closed-loop system, the FDFO-NF hybrid system using a TFC FO membrane with an optimum NF recovery rate of 84% had the lowest unit operating expenditure of AUD $0.41/m3. Besides, given the current relatively high price and low flux performance of the cellulose triacetate and TFC FO membranes, the FDFO-NF hybrid system still holds opportunities to reduce operating expenditure further. Optimizing NF recovery rates and improving the water flux of the membrane would decrease the unit OPEX costs, although the TFC FO membrane would be less sensitive to this effect.

Original languageEnglish
Pages (from-to)76-85
Number of pages10
JournalDesalination
Volume416
DOIs
Publication statusPublished - 2017 Aug 15

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Keywords

  • Desalination
  • Fertigation
  • Fertilizer drawn forward osmosis
  • Hybrid systems
  • Life cycle assessment
  • Nanofiltration
  • Reverse osmosis

ASJC Scopus subject areas

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

Cite this

Kim, J. E., Phuntsho, S., Chekli, L., Hong, S., Ghaffour, N., Leiknes, T. O., Choi, J. Y., & Shon, H. K. (2017). Environmental and economic impacts of fertilizer drawn forward osmosis and nanofiltration hybrid system. Desalination, 416, 76-85. https://doi.org/10.1016/j.desal.2017.05.001