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Reducing the Environmental Impact of Waste Brine from Desalination Plant

Hormati, Hossein | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54455 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Farhadi, Fatollah; Mousavi, Abbas
  7. Abstract:
  8. Water is essential for human life and other organisms. Increasing population and consequent increase in water consumption has made freshwater scarcity a global problem. Desalination of saline water sources is a long-term solution to this problem. One of the most challenging issues in desalination is the management and disposal of brine. Disposal of brine into the sea and surface waters is the primary solution for brine management. Due to the environmental problems caused by the discharge of brine into the sea and surface waters, the concept of zero liquid discharge has recently been considered. In this research, an economic study of reverse osmosis-electrodialysis-crystallization structure has been performed in order to desalinate seawater with the concept of zero liquid discharge. The production of sodium chloride as a by-product to reduce the cost of water was also examined. Studies have shown that the price of electricity and the price of salt produced have a significant impact on the economic feasibility of this structure. In the global model, with a salt price of 150 $/tonne, the price of produced water is zero dollars. In Iran, due to the low price of electricity, this number is 95 $/tonne-salt
  9. Keywords:
  10. Desalination ; Zero Liquid Discharge ; Reverse Osmosis ; Brine Discharge ; Electrodialysis System ; Crystallization ; Brine Management

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