FACULTY OF ENGINEERING

Advancements in technology have led to a steady decline in the effort required to produce work, with better designs offering an effective and economical means to achieve desired outcomes with reduced effort. Power screws serve to transform rotary motion into translator y motion, as exemplified by the screw jack, where a minor horizontal force elevates or descends a substantial load. Operating akin to an inclined plane, the mechanical advantage of a screw jack is determined by the ratio of load to effort applied. Adjustment of the jack's height is facilitated by turning a lead screw, achievable either manually or through integration of an electric motor. The whole components is designed on a base plate of relatively good resistance to deformity and act as a support to weight balancing during the operation of the motor
This project analyzes the fabrication of a motorized screw jack by incorporating an electric motor in the screw in order to make load lifting easier. In this fabrication design, the power screw is rotated by connecting motor through universal joint and gear axle to power the screw jack plugged to the automobile 12 V battery source to generate power for the prime mover (motor), which transmits its rotating speed to the power screw to be rotated with required speed reduction and increased torque to drive the power screw. The significance of this project to design a car jack in form of motor operating condition in order to make the operation easier, safer and more reliable in order to reduce health risks especially back ache problems associated with doing work in a bent or squatting position for a long period of time. The motorized screw jack is easy to use by women or whoever had problem with the vehicle tyres along the road. It will also save time and requires less human energy to operate. Based on results, the project provide a motorized jack able to effectively lift a load of 750kg to 1000kg and also provide a safe usage during maintenance of vehicle.

The efficient execution of drilling operations hinges upon a comprehensive evaluation of surface facilities, encompassing an array of parameters and factors. This project delves into the intricate web of variables that influence drilling efficiency, wellbore stability, and equipment selection. Through meticulous analysis, it uncovers critical insights into mud weight control, pump displacement, pipe diameter considerations, and the deployment of solids control equipment such as desilters and desanders (hydrocyclone). These findings are poised to empower drilling engineers and operators with the knowledge needed to optimize surface facilities during drilling operations, ensuring a harmonious interplay of equipment, drilling fluid properties, and operational parameters. By bridging the gap between theory and practical application, this project not only contributes to the advancement of drilling engineering but also offers tangible recommendations to enhance drilling endeavours' efficiency, safety, and overall success

Although centralized institutions, like governments, can use blockchain technology to increase the safety and security of sensitive data, this technology also permits the emergence of decentralized business models. The proposal to create a car registration system in Nigeria that can enhance interoperability between governmental agencies and might be expanded to a cross-borders system is described in this project work and is based on the Ethereum blockchain network. The suggested system takes care of all car registration-related procedures, including changing a vehicle's ownership status and registering it. As the car registration information is supplied to each government agency in a single decentralized system, this approach can facilitate information interchange among several states

With Nigeria generating over 42 million tonnes of waste annually, improper disposal poses significant risks to soil health, groundwater, and public health. This study examines the contamination levels of heavy metals and the physicochemical properties of soil at a solid waste disposal site in Ovia Northeast, Edo State, Nigeria. Soil samples were collected at varying depths (10, 20, 30, and 40 cm) from a dumpsite and a control site, focusing on lead (Pb), iron (Fe), copper (Cu), and manganese (Mn), alongside properties such as pH, bulk density, porosity, organic matter, and electrical conductivity (EC). Results revealed elevated levels of heavy metals at the dumpsite compared to the control site, particularly in the top 10 cm of soil. For example, Pb concentrations reached 12.31 mg/kg at the dumpsite, nearly three times higher than the 4.24 mg/kg observed at the control. Similarly, copper (Cu) levels at the dumpsite peaked at 74.22 mg/kg, significantly higher than the control site’s 57.47 mg/kg. Physicochemical properties demonstrated a strong influence on metal mobility: soil pH at the dumpsite ranged from 7.12 to 7.62, slightly higher than the control’s 6.86 to 6.12. Organic matter content decreased with depth, from 8.74% at the surface to 3.15% at 40 cm in the dumpsite, compared to 9.07% to 2.54% in the control. EC values were markedly higher
at the dumpsite (252–290 µS/cm) compared to the control (144–168 µS/cm), reflecting leachate infiltration and ion enrichment. The findings underscore the environmental risks posed by heavy metal contamination, including soil degradation, reduced fertility, and potential bioaccumulation in the food chain. Elevated
metal concentrations exceeded WHO permissible limits, necessitating immediate remediation actions. Recommendations include the implementation of sustainable waste management
practices, soil remediation techniques such as phytoremediation, and ongoing monitoring to mitigate long-term environmental impacts.

The growing demand for renewable and sustainable fuels has led to increased research into biodiesel production from non-edible oils. This study aims to evaluate the techno economic feasibility of biodiesel production from a ternary blend of neem oil, castor oil, and waste vegetable oil. The research focuses on analyzing the economic viability through Aspen Plus simulation, with an emphasis on optimizing reaction parameters to achieve a high biodiesel yield while maintaining
cost-effectiveness. In this study, the acid values of the feedstocks were first determined through titration, revealing the need for pre-treatment via esterification before transesterification. The Aspen Plus process simulation was employed to model the transesterification reaction, incorporating key factors such as methanol-to-oil ratio, reaction temperature, and the flowrate. A techno-economic analysis was
conducted to determine capital investment, operating costs, net present value (NPV), internal rate of return (IRR), and payback period, providing insights into the financial viability of the biodiesel production process. The results indicate that biodiesel production from the ternary blend is economically feasible.
The total capital investment for the project was $7,020,220 (₦10,603,000,000), with an annual operating cost of $1,793,070 (₦2,710,000,000). The total revenue generated was $15,678,800 (₦23,678,000,000) per year, leading to an NPV of $78,295,380 (₦118,180,000,000) at a 10% interest rate. The internal rate of return (IRR) was 28.2%, demonstrating strong investment potential, while the payback period was approximately 0.51 years (~6 months), indicating rapid cost recovery. Additionally, the profit margin was 88.56%, confirming the economic viability of
the process

For its bio- and environmentally friendly properties, low cost, and relative abundance, clay has become increasingly relevant and used. Based on their components and layer patterns, clay minerals have a variety of morphological and physicochemical characteristics., in addition to its well-established uses in adsorbent development, water treatment, and construction. In order to determine whether clay samples from the Ikpeshi town in the Akoko-Edo LGA could be used in an industrial process, its physical and chemical characteristics were examined. The study involved the analysis of elemental content, mineral constituent, functional groups of compounds content, surface morphology, and thermal stability with EDXRF, XRD, FTIR, SEM, BET and TGA respectively. Results revealed that the sample was kaolinite with SiO2 45.116 wt%, and Al2O3 20.39 wt% as the most predominant elements. Wave numbers of 909.47043cm-1 to 998.92654cm-1 with bold peaks revealed the presence of SiO4-4. The overall study revealed
kaolinite characteristics and strong thermal stability thus possesses properties for clay suitable for lining furnace kilns.

This report details the design and implementation of an electric-solar vehicle,
focusing on the fabrication and testing of its inverter. The inverter, a crucial
component for efficient power conversion, was developed to optimize the
integration of solar energy with an electric motor drive. This report focuses on the
practical aspects of the inverter's construction and performance evaluation.
The design considerations are outlined, followed by a detailed description of the
component selection, PCB fabrication, and assembly. Performance testing results,
demonstrating the inverter's efficiency and suitability for the vehicle, are also
included.

This project addresses the critical need for efficient and accessible water pumping solutions in various applications, particularly in contexts with limited access to conventional power sources. Water pumping systems are integral to industries ranging from agriculture to disaster relief. However, challenges such as power dependency, infrastructure limitations, and environmental concerns persist. This project introduces a transformative approach by integrating a hand drill as the primary power source within a centrifugal pump system. This innovative solution leverages the portability, affordability, and versatility of this device, making it a practical and cost-effective alternative. The hand drill-powered system eliminates the reliance on electricity or fuel, enhancing accessibility in remote or emergency situations. In addition to its applicability in car washes, low volume irrigation, and medical microfluidics, this project extends its impact to various fields, including agriculture, disaster relief, and remote research stations. It offers a sustainable, portable, and environmentally responsible water pumping solution that aligns with modern needs. By combining the convenience of hand drills with the efficiency of centrifugal pumps, this project represents a significant advancement in water pumping technology.

This project addresses the critical need for efficient and accessible water pumping solutions in various applications, particularly in contexts with limited access to conventional power sources. Water pumping systems are integral to industries ranging from agriculture to disaster relief. However, challenges such as power dependency, infrastructure limitations, and environmental concerns persist. This project introduces a transformative approach by integrating a hand drill as the primary power source within a centrifugal pump system. This innovative solution leverages the portability, affordability, and versatility of this device, making it a practical and cost-effective alternative. The hand drill-powered system eliminates the reliance on electricity or fuel, enhancing accessibility in remote or emergency situations. In addition to its applicability in car washes, low volume irrigation, and medical microfluidics, this project extends its impact to various fields, including agriculture, disaster relief, and remote research stations. It offers a sustainable, portable, and environmentally responsible water pumping solution that aligns with modern needs. By combining the convenience of hand drills with the efficiency of centrifugal pumps, this project represents a significant advancement in water pumping technology

The components of bio-waste are particularly abundant in essential minerals like calcium and potassium, which are essential for the manufacture of effective biocatalysts for biodiesel. This study evaluated the potential of bio-based heterogeneous catalyst of fused cockle shells and watermelon peels for the transesterification of waste vegetable oil. At 900°C and 500℃, the waste materials were dried, calcined, and carbonized, respectively. In order to evaluate the compositional, morphological, structural, and thermal features of both the catalyst and the precursor materials, they were both characterized. The Box-Behnken design was utilized to generate 29 experimental runs to examine the impact of operational parameters such catalyst loading, temperature, methanol-to-oil molar ratio, and reaction time. The presence of basic (calcium and potassium) and acidic oxides (silicon and nickel) demonstrated that the catalyst was bi-functional. The catalyst's surface area (105.35 m2/g) and pore volume (0.60 cm3/g) obtained from the BET analysis contributed to a 91.77% biodiesel yield at 63.34 °C reaction temperature, 149.41 min reaction time, 1.05wt% catalyst loading, and a 14.45:1 methanol to oil ratio. The physicochemical parameters of the biodiesel produced were measured and determined to be acceptable according to the European National (EN) and American Society for Testing of Materials (ASTM) quality standards, demonstrating the product's suitability for use as fuel