Doctoral

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Browsing Doctoral by Author "Ezetoha, Franklin Chukwudorue"

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    Development of a smart electronic system for maintenance of optimum water quality in warm water fish culture
    (Federal University of Technology, Owerri, 2023-11) Ezetoha, Franklin Chukwudorue
    This dissertation presents the development of smart electronic system for maintenance of optimum water quality in warm water fish culture. The aim of the research work was to develop an efficient and reliable automation system for maintenance of optimum water quality required for optimal production and sustainable warm water fish culture. The optimum water quality maintenance system was divided into four subsystems; optimum water temperature maintenance system, optimum water dissolved oxygen maintenance system, optimum water pH maintenance system and preventive maintenance system. The four subsystems where developed separately and then integrated to form the desired optimum water quality maintenance system for warm water fish culture. Each of subsystems was developed via designing and simulation, calibration and validation of sensors, hardware implementation and software development. Top down design approach was adopted in designing the hardware and program while bottom up design approach was adopted in designing application for the system. Arduino Mega 2560 was used to control all the operations of the system. Other major components of the system include water quality monitoring sensors such as temperature, dissolved oxygen, pH and turbidity sensor, solenoid valves,ultrasonic sensor, water pump, servo motor, GPRS gateway, liquid crystal display and Smartphone. The subsystems were tested by subjecting each of them to various optimum limits of the water quality parameter it maintains in a 2m x 1.6m x 1.2m fish pond and observing the pond, liquid crystal display and Smartphone. The complete system was tested by installing its sensors in fish pond and switching it ON and allowing it to operate for two months. The results of the tests showed that the system maintained optimum water quality in warmwater fish culture by maintaining water temperature at a range of 20oC to 28oC, dissolved oxygen at 5mg/L to 7.5mg/L, pH at 6.8 to 8.5, turbidity at 10mg/L to 20mg/L and water level at 1.17m to 1.2m. The system was fully developed and performed its optimum water quality maintenance operation by using simple and low-power consuming components for exchanging portion of the water with appropriate water when any of the quad-essential water quality parameters reached optimum level and adequately prevented water quality problems with efficiency of 96%. The system also displayed the level of each pond water maintenance parameter on LCD and sent information about condition of the pond water and maintenance action taken to Smartphone via application and global packet radio service gateway.