Simeon Olatayo Jekayinfa

Ladoke Akintola University of Technology · Department of Agricultural Engineering

The use of biomass as a source of energy has been identified to be energy intensive, involving high handling costs. However, pelletization reduces the bulk density of biomass, thereby reducing the handling costs and enhancing ease of use. This study modified and evaluated an existing hand-operated fish feed pelleting machine. The parts of the machi...

Sweetsop seed holds significant economic value as an oil seed, with ca. 25% oil content that finds applications as a feedstock for energy generation. The moisture‐modulated thermophysical properties of the seed were determined at varying moisture contents (8.0%–32.5%). Physical properties (length [L], width [W], thickness [T], arithmetic [Amd], and...

Efficient utilization of biomass requires conversion into forms that can be optimally applied in energy generation. Briquetting involves the compaction of biomass into solid blocks that are more efficient than raw biomass, and provides ease of transport and handling. These are improved when the briquettes possess a high density, shatter index, and...

The use of biomass as a source of energy has been identified to be energy intensive which involves high cost of handling. However, pelletization reduces the bulk density of biomass, thereby reducing the cost of handling and enhancing ease of use. This study modified and evaluated an existing hand operated fish feed pelleting machine. The parts of t...

Efficient utilization of biomass requires conversion into forms that can be optimally applied in energy generation. Briquetting involves compaction of biomass into solid blocks that are more efficient than raw biomass and provides for ease of transport and handling. These are improved when the briquettes possess high shatter index and compressive s...

The increasing global demand for energy has fueled a search for sustainable and renewable alternatives to traditional fossil fuels. Biodiesel, produced through transesterification of triglycerides, stands out as a promising candidate. This study explores the potential use of calcined pawpaw dried leaves ash (CDPLA) as a heterogeneous catalyst for b...

Production of pellets from biomass has gained the interest of researchers in recent times due to their carbon-neutral characteristics. Problems such as low density and bulkiness inhibit their use as solid biofuels. This study produced and characterized pellets from Rice Bran (RB) and corncob using a pelleting machine. RB was collected from a rice m...

The research explores the viability of Kola Nut Pod (KNP) residue, derived from kola fruit in West African countries, as a catalyst for biodiesel synthesis. The abundant KNP husk, a byproduct, raises environmental concerns if discarded directly. The study aims to utilize KNP as a biocatalyst to address environmental issues and reduce biodiesel feed...

The study investigates the energy use pattern and economic analysis of fluted pumpkin production in tillage methods (traditional, reduced-conventional and conventional). Human power, machinery, diesel fuel, fertilizers, seed and pesticides energy inputs were used during the cultivation of fluted pumpkin. Input and output energy analysis method was...

Cellulosic biomass could solve environmental challenges posed by utilization of fossil fuels. Biomass needs to be processed through densification to ease handling, transport and storage. This study considered the densification of rice bran into pellets using a screw-type pelleting machine. Investigations determined the effect of the starch binder q...

This review explores the potential of green fuels, derived from biological sources, as a viable replacement for conventional fossil fuels. Green fuels offer significant environmental benefits, including reduced greenhouse gas emissions, improved air and water quality, and decreased carbon output. Extensive research and development efforts are under...

Attiéké, made from biofortified (yellow) cassava genotypes, requires a new cooking method to minimize carotenoid degradation during processing. Thus, this research is aimed at designing and building a more efficient steamer to produce high-quality attiéké from biofortified cassava roots. Using three improved biofortified cassava genotypes (IBA14109...

This study focused on the effect of drying method on drying properties of wild lettuce leaves. The fresh wild lettuce was washed thoroughly to remove extraneous parts and subjected to pretreatments by dipping 200 g of vegetable samples into the water (1.5w/v) solution with 0.3% sodium metabisulphite held at room temperature. The pre-treated and unt...

Soursop kernel is an oil-bearing seed containing about 25% non-edible oil per 100 g sample making it a potential feedstock for biofuel production. However, exploring the full potential of the oil requires data to design and fabricate appropriate machines for its processing. So, this necessitates a thorough examination of its physical and solid flow...

Soursop kernel is an oil-bearing seed containing about 25% non-edible oil per 100 g sample making it a potential feedstock for biofuel production. However, exploring the full potential of the oil requires data to design and fabricate appropriate machines for its processing. So, this necessitates a thorough examination of its physical and solid flow...

Citation: Oloyede, C.T.; Jekayinfa, S.O.; Alade, A.O.; Ogunkunle, O.; Laseinde, O.T.; Adebayo, A.O.; Abdulkareem, A.I.; Smaisim, G.F.; Fattah, I.M.R. Abstract: The use of biobased heterogeneous catalysts made from agricultural waste for producing biodiesel has gained attention for its potential to create a sustainable and low-cost process. The blen...

Biomass has a high potential to contribute towards resolving the energy deficit. Processing biomass into solid fuels enhances its use in various bioenergy conversion technologies. The quality of densified biomass depends on several variables. The investigation of the effect of densification parameters on briquette quality is necessary for process o...

This cover image is based on a review article titled “Exploration of Agricultural Residue Ash as a Solid Green Heterogeneous Base Catalyst for Biodiesel Production”. In transesterification reactions, heterogeneous solid catalysts are currently replacing homogeneous catalysts because of their ability to overcome hurdles associated with homogeneous c...

The cost and difficulty in the preparation of synthetic heterogeneous base catalysts is the main barrier to their use. Today, the majority of these catalysts are derived from biomass resources. This study aimed at developing and characterizing these catalysts from three biogenic residues for biodiesel production without catalyst support. The EDS in...

Biodiesel is an economical and nonpolluting green fuel produced from the transesterification of oil and alcohol in the presence of a catalyst. Transesterification of vegetable oils with conventional (homogeneous) catalysts for biodiesel production is considered to have a promising future but they are nonrenewable and hazardous. The major setback is...

There are environmental concerns on the use of synthetic binders for the production of particle boards. This has stimulated interest in developing boards which do not require the use of these binders but derive adhesion from the activation of the natural chemical constituents of the materials used in manufacture of the boards. Due to the complex na...

This paper examines a case of a groundnut plantation in the northern part of Nigeria of known high crop yield. The data collected were used to compute the energetic parameters for the input energy from electrical, thermal and human sources and the outputs to determine the energy equivalents in the form of energy productivity, specific energy, energ...

Biomass from agriculture is a promising alternative fuel due to its carbon-neutral feature. However, raw biomass does not have properties required for its direct utilization for energy generation. Torrefaction is considered as a pretreatment method to improve the properties of biomass for energy applications. This study was aimed at investigating t...

This study addresses energy and exergy analysis of soybean production and processing operations in Nigeria. The total energy utilization, the point of energy losses, wastage and degradation associated with production of soybeans and industrial processing of crude vegetable oil and soy meal, was investigated using the exergetic analysis approach. Th...

Biomass densification is a complex process with each biomass having a unique set of variables from which briquettes of desirable quality can be produced. This study produced briquettes under different process conditions from Abura (Mitragyna ciliata) sawdust. The moisture content of the sawdust was 14.84%. Process variables considered were temperat...

Mitigating environmental concerns of climate change and global warming requires renewable and sustainable alternatives to reduce over-reliance on fossil fuels. Cleaner production practices have adopted the use of renewable alternatives to energy and material development with biomass playing a key role. With increasing potential of biomass technolog...

Optimising biogas yields from anaerobic digestion of organic wastes is significant to maximum energy recovery in the biodigestion process and has become an important topic of interest. Substrate particle size is an important process parameter in biogas production, and it precedes other pretreatments methods for the majority of the lignocellulose ma...

Shea butter oil (SBO) is underutilized in the biodiesel production industry in Nigeria because of its high free fatty acid (FFA) which reduces its biodiesel yield. This research aimed at optimizing shea butter oil biodiesel (SBOB) production using a biomass-derived heterogeneous catalyst. Crude SBO was purified and then esterified with H2SO4. An ac...

In a typical developing country like Nigeria, there is waste generation increase alongside population growth. The waste generated are often poorly disposed, thereby causing environmental pollution. To this end, this study investigates the energy potential of the waste created in some selected areas in Ogun State, Nigeria. The population and municip...

This study evaluated optimal process parameters for mechanical oil expression from castor seeds after designing a castor seed roaster-expeller. The effect of input variables (Moisture Content at 6, 7, 8, 9 and 10% db; Roasting Temperature at 80, 90, 100,110 and 120 o C and Applied Pressure at 15, 20, 25, 30 and 35 MPa) on the oil yield, expression...

Nigeria is a developing country with an insufficient supply of energy to meet the continuously growing demand. However, there are several biomass resources available within the country. This paper presents a desk review, which investigates the potential resources for biomass energy generation within the country. Energy policies to aid biomass use a...

The study was undertaken to investigate the energy input and output of a group of citrus research farms in Nigeria. Data used in this study were collected in-situ on yearly basis; therefore the analysed and discussed energy values were averages of data collected over the years. The research results indicated that total energy inputs were 46.64 GJ h...

Aim: To study the effects of different sizes of groundnut shell on biogas and methane yields using batch reactor at mesophilic temperature. Place and Duration of Study: The laboratory experiment was carried out at the Laboratory of the Department of Agricultural Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria, between Augus...

The cultivation of fast-growing wood (e.g., poplar, willow or black locust) in short rotation coppices and agroforestry systems presents an opportunity for producing biomass sustainably in the agricultural sector. Cost-efficient agricultural wood production requires the availability of high-performance machinery and methods with which high-quality...

Life cycle assessment (LCA) was developed to estimate the environmental impacts of industrial production processes and systems. This paper assessed the environmental impacts associated with the production, storage and disposal of cowpea grains in Ilorin, Kwara state, Nigeria, and proffer ways of improving and reducing some of the environmental impa...

The behavior of an agricultural system can be understood better by considering its economic and environmental analysis. In order to reduce environmental load of energy uses, there is need for improved energy conversion and utilization. In this research, the energy consumption pattern in cassava production, and its environment burden were considered...

Groundnut is one of the most cultivated agricultural produce due to its higher percentage of nutritional compositions of protein and oil than other cereals such as maize, rice, etc. hence there is need to access its impact on production and processing on the environment using life cycle assessment (LCA) approach according to ISO procedural framewor...

Viscosity and density are important properties that qualify biodiesel fuel to serve as an alternative fuel because all other properties directly or indirectly depend on them. The processes involved in determining the viscosity and density of biodiesel are relatively simple and costly and there are discrepancies in the results obtained due to the di...

Viscosity and density are important properties that qualify biodiesel fuel to serve as an alternative fuel because all other properties directly or indirectly depend on them. The processes involved in determining the viscosity and density of biodiesel are relatively simple and costly and there are discrepancies in the results obtained due to the di...

Solid biofuels can be used in heat and power generation applications. The utilization of agricultural residues for this purpose would be of immense benefit to rural communities of developing countries where the resource is being produced. Water resistance is a crucial property for transport and storage of biomass briquettes under moist climate cond...

Inaugural lecture

Purpose: This study aims to explore low temperature and pressure to extract the lignocellulosic content of palm fruit fibre and pyrolyse it for energy (bio-oil) and chemical feedstock productions as alternative technology to improper disposal causing environmental pollution as strategies for climate change and adaptation. Design/Methodology/Approac...

Biomass obtained from agricultural wastes have a high potential for energy generation, particularly in developing countries. The poor properties of the agricultural biomass cause handling problems and limit the suitability as fuel in conventional grates. Densification of biomass into briquettes enhances its fuel properties. In this study, effects o...

Renewable energy appears to be a way out of the associated challenges of the conventional sources of energy. One of these renewable sources is biogas. Biogas is the gas produced when anaerobic bacteria act on organic matters in the absence of oxygen. Anaerobic digestion has been considered as waste-to-energy technology. In this work, attempt was ma...

Biomass obtained from agricultural wastes have a high potential for energy generation, particularly in developing countries. The poor properties of the agricultural biomass cause handling problems and limit the suitability as fuel in conventional grates. Densification of biomass into briquettes enhances its fuel properties. In this study, effects o...

The efficient use of human labour has received little or no attention in the past, the main aim of this study was to audit the consumption and efficiency of manual labour input in the production and processing of some selected crops in Southwestern part of Nigeria. Five farms of about one hectare each were considered and the crops grown were cassav...

Compression ignition engines have wide application in the transportation, agricultural, construction and industrial sectors which are critical for the economic sustainability of any nation. These engines are powered with petroleum diesel which is however, been threatened by the reality of crude oil going into extinction in some couple of years if n...

:The environmental impacts and energy usage associated with field production and processing were studied using life cycle impacts assessment tool with a functional unit of one kilogram (1kg) of rice. Energy productivity, efficiency and specific energy were computed and descriptive statistics were used for data analysis. The energy use pattern showe...

The environmental impacts and energy usage associated with field production and processing were studied using life cycle impacts assessment tool with a functional unit of one kilogram (1kg) of rice. Energy productivity, efficiency and specific energy were computed and descriptive statistics were used for data analysis. The energy use pattern showed...

Densification of loose biomass improves its properties for use as fuels. To design efficient briquetting equipment, there is a need to study properties of briquettes under different conditions. In this study, the effects of process variables (pressure, temperature, and hold time) and a material variable (particle size) on the density of corn cob br...

This study established a kinetic model for predicting biogas production using a Continuously Stirred Tank Reactor (CSTR) digesting cattle manure under varying Organic Loading Rate (OLR) at Thermophilic Temperature (TT) of 56 ±1°C . The daily reactor loading was commenced at an OLR of 1.0 g.oTS/L.d. This (OLR) was increased fortnightly by 0.5 g.oTS...

Irrigation water supply in agricultural production can be energy intensive because of large electric motors utilized and the length of time required for such operations. The present study investigates the energy requirement for irrigation water supply in five different schemes in the North Central Nigeria. The use of well-structured questionnaires...

In 2000, the leaders of member states of the United Nations adopted the Millennium Declaration, which set out a series of clear commitments, goals and targets to achieve Human Development. These ambitious goals were subsequently refined into eight Millennium Development Goals (MDGs), designed to provide a framework for accountability, donor coordin...

Biogas production has contributed greatly as an alternative source of fuel power to solving various developing nations' problems including high dependency on petroleum products. This gives a clear objective why its production is seriously needed, as it plays a significant role in destroying and converting municipal and agricultural wastes into a us...

Physic nut is a biomaterial that litters villages during the seasonal period which requires effective drying for oil and bio-fuel production. However, the natural method of drying and the existing dryer are found ineffective due to prolonged drying time leading to poor quality control. Processing of dried physic nut is required to ensure preservati...