• Lakshmi V
• Prof. Maheshan C M

Abstract: In recent years, the world facing the energy crisis as well as waste management as the biggest problem. This problem can be solved by anaerobic digestion where the waste is converted into biogas. The increase in global warming in addition to rapid depletion of coal and oil have promoted to do research on alternative fuels. Consequently, the use of renewable energy supports to reduce pollution. The temperature along with the concentration of waste must be maintained at a particular threshold level to acquire the high yield of biomass. Hence, there is need to control of these parameters. The primary intention of the undertaking is to develop a controlling system to manage the fermenter temperature as well as the biomass concentration within the tolerance limit. By using the mathematical modeling equations, the continuous stirred tank fermenter is designed in MATLAB/Simulink. The proportional, proportional and integral, proportional plus integral plus differential and fuzzy logic controlling system techniques are used to control the biomass concentration as well as the temperature of the bioreactor by manipulating the feed dilution rate and the jacket dilution rate respectively. This experiment also carried out without using any controlling strategies. The performance results without as well as with controllers are validated using accuracy, efficiency along with stability of the fermenter. Simulation results depict the Fuzzy controller presents superior performance compared to all other controllers.

Keywords: Waste management, Global warming, Anaerobic digestion, Continuous stirred tank fermenter, Fuzzy controller, P, PI and PID controller, MATLAB/Simulink.

"Fuzzy Logic control of Continuous stirred tank Fermenter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 10, page no.e461-e474, October-2021, Available :http://www.jetir.org/papers/JETIR2110472.pdf

"Fuzzy Logic control of Continuous stirred tank Fermenter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 10, page no. ppe461-e474, October-2021, Available at : http://www.jetir.org/papers/JETIR2110472.pdf