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Gas Fermentation Development Using Flux Balance Analysis

Sohrabi Shoabjareh, Ali | 2023

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 56894 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Farhadi, Fathollah; Pishvaie, Mahmood Reza
  7. Abstract:
  8. In this thesis, a typical dynamic model of syngas fermentation, refered as hybrid method for biofuels production, coupled with a distillation column is developed in SimDFBA. The bioreactor is simulated in MATLAB/Simulink by using Clostridium ljungdahlii acetogenic micro-organism metabolic network. Bioreactor modeling is accomplished with a bubble column reactor in both liquid and gas phases, while the separator was simulated with ASPEN. PDE equiations of bioreactor modeing are dicretized to ODE equation by using QUICK scheme of finite volume method. A new econometric optimization study for outlet gas purification through a pressure swing adsorption unit to recycle relatively pure hydrogen is also investigated. Such optimization has increased the ethanol concentration by around 220%. In addition, a Proportional-Integral (PI) controller was tuned to control the concentration of ethanol product of the bioreactor, while the control loop for downstream recovery unit were implementd in ASPEN. The results show that using a purified hydrogen flow as a manipulated variable has controlled successfully the ethanol concentration in the bioreactor outlet stream
  9. Keywords:
  10. Bioprocessing ; Integrated Modeling ; Finite Volume Method ; Bioethanol ; Optimization ; Ethanol Fermentation ; Syngas Fermentation ; Flux Balance Analysis Method

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