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Dynamic Simulation of a Bioprocess for Simultaneous Desalination and Water Wast Treatment

Hosseini Vejdan, Davar | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54882 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Pishvaie, Mahmoud Reza
  7. Abstract:
  8. Microbial desalination cells have been considered as one of the most promising technologies in water desalination and wastewater treatment. Due to slow biological processes, experimental approach toward these types of cells has always been a challenge. Consequently, modeling and simulation techniques are crucial to be developed in order to avoid wasting time and resources.In this study, a dynamic model for a microbial desalination cell consisting of three parts: anode, cathode and desalination section is proposed in which changes in microorganism concentration, acetate concentration as anode feed, oxygen concentration in cathode, pH changes and electrical potential drop in anode and cathode are considered as effective factors. Static and dynamic simulation of this model has been developed in MATLAB and Simulink, respectively. Comparison of the simulation outputs with experimental results available in the literature indicates an average error of 1.5% in salt concentration of the middle section and also 3% in electrical potential as well as the current density of the cell. After presenting and interpreting the results of the dynamic simulation, with both continuous and discontinuous flows, one of the main problems in this type of microbial cells i.e., decreasing the pH in the anode section and its increasing rate in the cathode section, has been investigated. In addition, simulation of five techniques presented in the literature, namely increasing the volumetric specifications, increasing the flow rate through each section, injecting acid and base, injecting anode fluids to the cathode and vice versa and using a buffer solution are presented in this work
  9. Keywords:
  10. Desalination ; Waste Treatment ; Microbial Desalination Cell ; PH Control ; Water Desalination ; Bioelectrochemical Systems

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