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Modeling of Brine Water Discharge into the Sea from Desalination Plants and Its Impacts on Sea Environment

Nasrollahpour Shareh, Ali | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55125 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Abbaspour Tehrani, Madjid; Mehdigholi, Hamid
  7. Abstract:
  8. Recent studies have shown that almost 40% of the world's population faces a water crisis, and this amount will reach about 60% by 2025. Due to limited freshwater resources and the increasing world population, we have to use seawater desalination systems to supply water to this growing population. One of the outputs of desalination plants in addition to freshwater is saline effluent or brine water, which is the most important environmental impact of these plants. In this study, an attempt has been made to investigate the various factors affecting the discharge and release of saline effluent from desalination plants and observe its impact on the ecosystem and marine environment. In this project, a general study in environmental and meteorological data is necessary to investigate the environmental effects of effluent discharge from desalination plants in the Persian Gulf and the Sea of Oman, and the general process of conducting saline discharge research area is presented. Initially, to better understand the problem of saline water desalination methods and technologies, the necessary data for flow simulation and brine diffusion were prepared from available Internet databases. Calibration of water level data in MIKE software has been done with the help of water level data available in the available database. Then, to study the environmental criteria of wastewater discharge, vegetation and animals and sensitive coastal areas of the Persian Gulf and the Sea of Oman were prepared. In a case study, utilizing MIKE numerical software has examined 3D modeling of brine emission at different scenarios with the current and upgraded capacity of the desalination plant in Chabahar Bay. Finally, after examining the brine emission, it was found that preventing the occurrence of recirculation phenomenon, the greater distance from the shore, and the depth of the discharge and the number of discharge points, the easier the brine diffusion and salinity dilution passes the criteria and Followed by better matches environmental standards.
  9. Keywords:
  10. Desalination ; Chabahar Bay ; Numerical Solution ; Brine Dispersion Modeling ; Mike 3 Flow Model ; Marine Ecosystem ; Effluent Discharge ; Seawater Desalination

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