College of Engineering

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FAULT IDENTIFICATION SYSTEM FOR ELECTRIC POWER TRANSMISSION LINES USING ARTIFICIAL NEURAL NETWORKS
(International Journal of Scientific & Engineering Research Volume 9, Issue 2, 2018-02) Mbamaluikem Peter O.,; Aderemi Oluwaseun S.,; Awelewa Ayokunle A.
Electric power transmission line faults hinder the continuity of electric power supplied and increase the system downtime thereby increasing the loss of electric power transmitted. Early fault detection and classification leads to prompt clearance of faults with an attendant effect of improved reliability and efficiency of the power system network. In view of this, this paper develops an arti-ficial neural network (ANN)-based detector and classifier to indicate and classify respectively a fault on Nigeria 33-kV electric power transmission lines. The transmission lines are modeled in Simulink using SimPowerSystems toolbox in MATLAB. Fault simulations are carried out, and the resulting instantaneous values of voltages and currents are used to develop the proposed fault identification sys-tem using multilayer perceptron feedforward artificial neural networks with backpropagation algorithm. Results are presented to vali-date the effectiveness and efficiency of the developed identification system for detecting and classifying faults. The Mean Square Error (MSE), linear regression and the confusion matrix are used as performance evaluators for the system. The ANN-based identification system achieved MSE of 4.77399e-10 and an accuracy of 100% for fault detection. This indicates that the performance of the developed ANN-based identification system is highly satisfactory and may be practically implemented on the Nigeria transmission lines.
Industrial- and automotive-used lubricating oils recycling cum acidic sludge treatment
(Springer, 2019) Oladimeji, Temitayo E; Oguntuashe, Kehinde M.; Emetere, Moses E.; Efeovbokhan, Vincent E.; Odunlami, Olayemi A.; Obanla, Oyinlola R.
Increased rise of industries and car usage in Nigeria and urban development is exponentially on the increase giving rise to multiple waste generation. Evaluation of the different recycling processes showed that acid-clay process has the highest environmental risk as well as the lowest cost; hence, this work added a treatment method for the slurry produced after treatment with acid-clay method, thereby reducing the environmental concern caused by acid and acid sludge formed in the process. The acid ratio was varied between 0 and 20% and adsorbent ratio between 15 and 25%. Automotive-used lubricating oil and industrial-used lubricating oil were treated using two different samples, acid and adsorbent. An increase in acid concentration showed a significant difference over the properties of oil such as density, viscosity, flash point, and other physiochemical properties nevertheless increasing the amount of acid over the optimum point made on significant change. Varying of adsorbent ratio showed little significant effect to density and flash point, while yield and viscosity were unaffected. Optimum point being at 10% acid and 25% adsorbent gave optimal result. All metal contaminants are substantially removed; total base number was improved, while increase in flash point suggested the method effectiveness. Treatment of used industrial oil was found to be easier to re-refine due to less contamination.
Preparation and characterization of activated carbon from plantain peel and coconut shell using biological activators
(International Conference on Engineering for Sustainable World, 2019) Efeovbokhan, V. E; Alagbe, E. E.; Odika, B.; Babalola, R.; Oladimeji, Temitayo E; Abatan, Olubunmi G.; Yusuf E. O.
A concern over the toxicity of chemicals used during the activation stage in the preparation of activated carbon is beginning to gain attention. The study therefore looked into the possibility of using bio-activators (lemon juice and potash leached from the peel of unripe plantain) as activating chemicals, for environmentally friendly activated carbon. Coconut shell and the peel from unripe plantain were used as feedstock and pyrolyzed at 400 and 450 0c. An impregnation ratio of 0.25:1 was used while laboratory grade potassium hydroxide was used as a base activating agent as a control setup. Characterization of the activated carbon was carried out using parameters like bulk density and yield which were obtained using standard procedures. Results showed that activating carbon using bio-activators as activating agents had very good characteristics when compared with the control. Bio-activators are therefore recommended for the production of bio based activated carbon especially in the fields of medicine, food and pharmaceuticals. The effect of carbonization temperature on adsorption efficiency and pore structure were investigated using methylene blue as adsorbate and SEM respectively
Influence of Organic Composite Material for Coating Application: A Review
(4th International Conference on Science and Sustainable Development (IOP Conf. Series), 2020) Adejumo O. A.; Fayomi O. S. I.
Composite materials have been used to coat products and substrates in different industries like Aerospace industry, Automobile industry;welding industry etc. The aim of this review is to describe the impacts and the effects of composite materials on coating applications in different industries. The first application mentioned was in the Aeronautic Industry, where powder (a composite material) is used to coat substrates. It has been studied and widely accepted as one of the most environmental friendly, economically beneficial and functional coating material. New types of powder coating are being developed to improve the aesthetic designs of Aeronautic and Automotive industries products. The second application was in the welding industry and its impacts on the electrode tool life was studied. The tool life is improved by 71% when TiC composite is used to coat the electrode.
Corrosion mitigating techniques and the mechanisms: Comment
(International Conference on Engineering for Sustainable World (IOP Publishing), 2021) Ayodeji A. I.; Fayomi O.S.I.; Babaremu K. O.; Abioye P. O.; Agboola O.; Daniyan A. A.
A lasting solution is required to curb the corrosion attack because of the very destructive effect it has on engineering materials. Corrosion is a material degrading phenomenon that reduces the significant properties of metallic materials, making them less useful. This paper has been able to highlight the very suitable methods or techniques that help to mitigate the effect of corrosion on metals and other helpful engineering materials. Some of these methods are electrodeposition and protective coatings like organic coatings, inorganic coatings, and metallic coatings.
Performance of mixed matrix nanofiltration membranes in wastewater treatment: A review
(International Conference on Engineering for Sustainable World (IOP Publishing), 2021) Agboola O.; Fayomi O.S.I.; Oni B.A.; Ayeni A.O.; Sadiku E.R.; Popoola A.P.I.; Moropeng I.; Adegbola S.T.; Daramola D.
Water covered close to 70% of the Earth’s surface; however, it is a struggle to access 3% of it as freshwater, suitable for human intake. The shortage of water has become a global issue due to climate change, pollution and the demand of growing freshwater. The fabrication of high performance and antifouling nanofiltration membranes are of utmost importance as a result of their capability of treating contaminated water and to also regulate the quality of freshwater. However, there is need for improvement in the fabrication of membrane using different nanofillers to produce mixed matrix membranes (MMMs). Mixed matrix nanofiltration membranes with nanofillers were reviewed for different applications
Corrosion Phenomena and the Occurrences; A comment
(International Conference on Engineering for Sustainable World (IOP Publishing), 2021) Ayodeji A. I.; FayomiO.S.I.; Daniyan A. A.; Babaremu K. O.; Abioye P. O.; Agboola O.
Corrosion refers to the deterioration of metallic materials resulting from the reactions between the components and their environe. However, corrosion occurs every day in the human world, both in industrial operations and domestically. This happens in different ways, making it well categorized into various types. This paper has concisely reported the basic phenomenon of corrosion, its environmental effect, and the various types like a crevice, pitting, erosion, and others. The Electrochemical behavior of corrosion was also reported as reactions that include oxidation and reduction reactions; oxidation reactions increase the valence number of materials by removing particles from the material, making them positively charged. In other ways, technological advancement has provided several attempts to understand this catastrophe, providing consistent mitigating measures and control toward attaining less cost. This overview studies the electrochemical corrosion phenomena and the prospect of materials selection in curtailing the ranging challenges.
A Simplified Design for Biodiesel Production
(International Conference on Engineering for Sustainable World (IOP Publishing), 2021) Ayoola A. A.; Alagbe E. E.; Agboola O.; Ayeni O. A.; Adeyemi G. A.; Nnabuko D.; Makinwa
A review on the sustainable energy generation from the pyrolysis of coconut biomass
(Scientific African (Elsevier), 2021) Azeta Osarhiemhen; Ayeni A. O.; Agboola O.; Elehinafe Francis B.
he negative impacts of the extraction and exploration of fossil fuel on the environment and its depletion that has led to environmental degradation have encouraged researchers, stakeholders, and the government to explore alternative and renewable energy sources such as lignocellulosic biomass. Biomass pyrolysis has proven to be a viable energy conversion process over the last decade due to its low carbon footprint on the environment. Pyrolytic products that are bio-char, bio-oil, and bio-gas have several applications and contribute to our society’s industrial, commercial, and economic growth. This paper reviews the different types of pyrolytic processes using coconut biomass as a feedstock while focusing on the biomass properties that make it useful for pyrolysis and the factors affecting the process.
Role of Biomaterials in Automation
(International Conference on Energy and Sustainable Environment (IOP Publishing), 2021) Fayomi O. S. I.; Adedeji A. A.; Agboola O.; Ajala M. O.; Bolu C. A.; Banjo S. O.; Udoye N. E.
Technology in its real sense is in an advanced state to an extent that automation is the present-day mode of operating machinery and equipment. This technique of operating or controlling a process using a highly automatic means via electronic devices thereby reducing the human interface to a minimum, if not rather than eliminating it completely. Transformation of the global workforce has already begun through automation with innovations of robotics, artificial intelligence remote connectivity, additive manufacturing and medical innovations employing the automated means of delivering or administering drugs and performing surgery on patients. In the present day, various forms of automation are increasingly taking over the place of human thereby, putting a threat to supplant it. The role of biomaterials in automation is the main objective in this discuss. The study revealed that metals play a major role in biomaterials due to its excellent thermal conductivity and mechanical properties.
Pillars of Effective and Efficient Energy Systems in Nigeria
(International Conference on Energy and Sustainable Environment (IOP Conf. Series), 2021) Fayomi O. S. I.; Banjo S.O.; Agboola O.; Oyebanji J. A.; Udoye N. E.
Nigeria is posed with a myriad of challenges to achieving efficient energy systems; the colossal collective demand for sufficient electricity for approximately 200 million is a concern. Another challenge is the mismanagement of Nigeria’s abundant resources, by individuals and by groups. It has withheld us, for decades, from making the bold and rapid progress which ought to have made for the energy system. This report explores the concept of an energy system in Nigeria perspective and progresses.
CONTROL OF FOSSIL FUEL GAS OPERATING CONDITIONS ON THE PERFORMANCE OF CARBON DIOXIDE CAPTURE PROCESS
(2021) Letsholo I.; Moropeng M. L.; Mavhungu A.; Agboola O.; Fayomi O. S. I.; Moropeng R. C.
Modelling and simulation of the volume flow of NH3, K2CO3 and for the Carbon dioxide absorption from coal
(2021) Nkhwashu M. I.; Moropeng M. L.; Agboola O.; Mavhungu A.,; Moropeng R. C.; Fayomi O. S. I.
Utilization of Bioresources: Towards Biomass Valorization for Biofuels
(Bioresource Utilization and Management, 2021) Sanni Samuel Eshorame; Agboola Oluranti; Moses Emetere; Okoro Emeka; Adefila Sam Sunday; Sadiku Rotimi; Alaba Peter
Biomass valorization has recently gained wide attention owing to the vast availability of wastes from which essential oils can be extracted, processed, and subsequently converted to energy utilities and value-added products by taking advantage of the free fatty acid contents of the parent bio-oils. The waste materials undergo a conversion process to give the prospective fuels. The two major final products of the conversion process are bioethanol and biodiesel. Recent findings have also indicated the usefulness of these products as intermediate products/raw materials for end products such as simple sugars or biolubes; this goes further to emphasize the huge potential in these substrates (agricultural wastes) when used as raw materials. In 252recent times, hydrogen from biomass is being sought as a means of energy to power cars, and this also brings to bear the need to underscore how far efforts have been made to introduce bioethanol-driven cars. Fossil fuels, besides being nonbiodegradable relative to bio-oils, are gradually being depleted, with no measures put in place for their replacement. This then suggests the need to look beyond the current situation for viable alternatives. This chapter provides background information on biofuels, their production processes, and their physicochemical characterization, application, and sustainability, since the world is like a vicious circle that currently tilts in the direction of "engineering for a sustainable world". Furthermore, the chapter unveils some gray areas of research that still remain untapped, thus opening up doors for revenue generation.
Empirical assessment of ammonia and urea concentrations in wastewater from a pharmaceutical plant: A case study
(International Conference on Energy and Sustainable Environment (IOP Conf. Series), 2021) Sanni S E.; Odigure J. O.; Agboola O.; Emetere M. E.; Okoro E. E.; Audu C.
In several ways, urea is one of the most prominent sources of fixed nitrogen due to its relative abundance in waste water treatment plants. In this study, the wastewater effluent from X-Chemical Industries was considered for hazard analysis in order to ascertain the water quality and impact at the outfall effluent of company X relative to environmental standards. The study period is for December, 2013 – February 2014. Based on the results, it was observed that at the company’s sluice gate, the desorber (primary treatment unit) did not perform optimally. Also, the variation of the parameters measured i.e. urea concentration, pH and ammonia concentrations exceeded the standards established by the World Bank, International Finance Corporation (IFC) and the National Environmental Standards and Regulations Enforcement Agency (NESREA), i.e. against the specified standard of 100 ppm, higher concentrations include December 3, 9, 11, 12, 19, 20, 21, 24, 25, 27, 28 and 29 with corresponding urea concentrations of 1457, 1970.4, 122.7, 163.2, 150.3, 171.4, 148.76, 270.78, 178, 123, 101.33 and 250.43 ppm respectively, whereas that of ammonia is higher than 5 ppm on December 3, 21, 24, 25, 26, 27, 28 and 29 with corresponding concentrations of 8.4, 9.69, 8.13, 9.45, 12.5, 6.98, 22.95 and 9.95 respectively, whereas, it was lowest on other days. It was also observed that the treated waste water advancing the creek (jetty) close to the plant, will have environmental consequences on marine lives such as marine micro-flora as well as fishes.
Data on the effect of Ibruprofen drug derivative on 430T1 stainless steel in acid solutions
(International Conference on Engineering for Sustainable World (IOP Publishing), 2021) Sanni O.; Fayomi O. S. I.; Popoola A. P. I.; Agboola O.
Production of activated carbon from sawdust and its efficiency in the treatment of sewage water
(Heliyon, 2021) Oladimeji, Temitayo E; Odunoye, Babatunde O.; Elehinafe, Francis. B; Obanla,, Oyinlola, R.; Odunlami, Olayemi, A.
When water is contaminated and rendered unfit for drinking, it is regarded as waste, which leads to water pollution. Several works have been done to control water pollution, yet this topic is still a point of concern up to date. The study involves the production of activated carbon (AC) using sawdust to treat sewage water obtained from Covenant University. The following conditions were investigated; activation time and temperature, acti vating agent concentration, and impregnation time. The AC was characterized by measuring ash content, iodine value, moisture, and volatile matter content. The optimum activated carbon prepared in this study had iodine of 1628.95 mg/gm, while the minimum activated carbon had an iodine of 470.41 mg/gm. According to standard procedure, the sewage water sample was characterized physio-chemically before and after treatment using activated carbon as an adsorbent. The results obtained indicated considerable improvement in the quality of the water. When optimum activated carbon was used for treatment, pH value changed from 7.7 to 7.10, biochemical oxygen demand (BOD) was reduced from 288 mg/l to 20 mg/l and Total dissolved solids (TDS) reduced from 183.7 mg/l to 16.4 mg/l, Total suspended solids (TSS) reduced 232 mg/l to 15.7 mg/l. When minimum activated carbon was used for treatment, pH value changed from 7.7 to 7.60, BOD was reduced from 288 mg/l to 112.2 mg/ l, and TDS reduced from 232 mg/l to 174 mg/l, TSS reduced 183.7 mg/l to 103 mg/l. The results obtained led to the conclusion that the produced activated carbon effectively treats the above-stated water quality parameters.
Emissions of CO and SO2 from solvent extraction treatment of used lubricant
(4th International Conference on Science and Sustainable Development, 2021) Oladimeji, Temitayo E.; Sonibare, Jacob A.; Omoleye, James A.; Emetere, Moses, E.; Odunlami, Olayemi, A.
Emissions fromused lubricant could have adverse effect on man and its environment due to the presence of degraded additives and contaminants. Different treatment methodshas been developed with few check on its pollution aspect. This study investigated the emissions of two major criteria pollutants - carbon monoxide (CO) and sulphur dioxide (SO2) from the solvent extraction treatment of used lubricant. CO was found to be the highest emitting pollutant with mean emission concentration of 85.85 mg/m3 which has exceeded the set NAQS standard while SO2 falls within the standard limit. Therefore,there is a great need to give attention to the control of CO emissions around the treatment plant. However, CO emission can be controlled by employing a CO converter to convert the poisonous gas to a less poisonous gas or substituting the existing process in solvent extraction with a more environmentally friendly one.
Surface effect of environmentally assisted corrosion growth of automotive welded steel performance
(Materials Proceedings Volume 38, Part 5, 2021-03) Fayomi O. S. I.; Samuel Olusegun David; Mashilo Matsobane; Popoola Abimbola Patricia; Agboola Oluranti; Balasubramanian Dhinesh
Failure of steel in automobile industries due to environmentally assisted medium in service is alarming. In this study an effort has been made to investigate critically the corrosion induced performances of automotive welded part. The experimental correlation on the effect of corrosive media (NaCl and HCl solutions) on the base metal, heat affected zone (HAZ) and weld metal formed were examined using linear potentiodynamic polarization technique. The hardness, microstructural and phase rationale of the studied joint was evaluated using, diamond base indenter, Scanning electron microscope and x-ray diffractograms respectively. The results revealed that the base metal has no detrimental phase transformation unlike the HAZ and the weld joint region. The hardness value of 185 HV welded joint was obtained compared to 235.95 HV of base region. The corrosion propagation in the 3.5NaCl and 1 M HCl shows that pitting deterioration occurs at the welded position in all case as a result of the shift in grain refinement and micro-straining during welding process.
Safety and Environmental Aspects of Cellulose Nanoparticles
(Cellulose Nanoparticles: Chemistry and Fundamentals, 2021-06-01) Fasiku Victoria Oluwaseun; Agboola Oluranti; Owonubi Shesan John; Revaprasadu Neerish; Sadiku E. R.
Nanoparticles made from cellulose are increasingly gaining attention in several fields for diverse applications, which can be attributed to their excellent properties. The physical, chemical, and mechanical properties of cellulosic nanomaterials are being studied to investigate their application in areas such as drug delivery, wound dressing, artificial tissues, and others. However, the safety and environmental aspects of cellulose nanoparticles (CNPs) are yet to be fully understood and established. The ambiguity surrounding their environmental health and safety remains a serious concern to the standards community. This chapter, therefore, provides information about the types of cellulose nanoparticles, and their various properties and the characterization techniques employed to provide useful information about their properties. It further proceeds to focus on the safety and environmental issues associated with cellulose nanoparticles and the handling practices which can be implemented to ensure maximum safety. This includes various safety techniques that have been developed as precautionary measures against the release and exposure of cellulose nanoparticles into the environment.