SUNConferences, Southern African Institute for Industrial Engineering 2014

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DESIGN OF AN INTELLIGENT FUZZY LOGIC- PID BASED BIOREACTOR CONTROL SYSTEM FOR AN AUTOMATED 50TPD ORGANIC FERTILISER PRODUCTION PLANT WITH AID OF A BM1 ENZYME
Talon Garikayi, Lungile Nyanga, Maxwel Sakutukwa

Last modified: 2014-06-26

Abstract


Temperature  control is  crucial for enzyme reactions  as  changes  in  temperature  can bring a reaction to a complete stop thus killing the enzyme. The greatest challenge on regulating bioreactor conditions is that one has to eliminate percentage overshoot,  long rise time and unforeseen transient responds. The main goal of this research was to design a complete control system with aid of hybridized Parallel Structure Fuzzy Logic-PID control algorithm so as to control the enzyme activity in a 50TPD bioreactor  for organic fertilizer manufacturing. To achieve this, temperature, pH, pressure and moisture analysis experiments were carried out. Experiments were also done on characterizing the intended raw materials. Process parameters were deduced through modeling and simulation in Matlab and Simulink environments.  To  a greater extend a process with recommendable rising time; no steady state error and recommendable transient response with no-overshoot was achieved.  In comparison with conventional PID controllers the proposed system shows higher control gains when states are away from equilibrium and at the same time retains a lower profile for control signals.


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