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Development of Simulation Model and Optimal Design of Water and Energy Recirculation System in Residential Towers

Javadinia, Maryam | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54178 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Saboohi, Yadollah; Fathi, Amir Hossein
  7. Abstract:
  8. nowadays, due to population growth, unconventional use of water resources and on the other hand, climate change, limited renewable water resources, reduction of groundwater cavities, the need for water for agricultural use and energy production are increasing. Due to the fact that each cubic meter of dirty water pollutes 40 to 60 cubic meters of clean water and the entry of polluted effluent into the receiving sources of environmental degradation leads to a lot of wastewater treatment, water consumption management and The development of wastewater treatment processes is also becoming increasingly important. At present, wastewater treatment plants face the challenges of high energy consumption and excessive nitrogen emissions. Therefore, the overall aim of the present study is to develop a mathematical method to optimally control nonlinear dynamic processes to calculate the optimal aeration in a sequential batch reactor for wastewater treatment. In this work, it is assumed that organic matter and nitrogen are the main pollutants that must be removed to achieve water quality goals. On the other hand, no binary variable is needed to calculate the shift time between aerobic and anoxic phases in the water treatment process. In fact, due to the fact that air enters the reactor through the control valve, it can be placed as a fraction between its minimum or maximum limits, which reduces the operating time and energy consumption.It should be noted that the developed optimal control method can be used to treat other contaminated streams as well as dynamic processes with several input and output variables.The results show that the developed optimization formulation, in addition to proper convergence, also has high accuracy. Reducing energy consumption and operating costs relative to reference research as well as achieving water quality goals confirm this
  9. Keywords:
  10. Process Optimization ; Process Control ; Optimal Control ; Dynamic Optimization ; Waste Treatment ; Nitrification ; Denitrification ; Purification Process Improvement

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