Conference Presentations by David Adeniran
Book of Abstracts of the Nigerian Institute of Industrial Engineers, 2019., 2019
The study presents the characterisation and potential utilisation of urban and street trees in th... more The study presents the characterisation and potential utilisation of urban and street trees in the University of Ibadan, Nigeria. Data were collected using structured questionnaires, oral interviews, direct experimentation and field observations. And the data were statistically analysed. The results revealed that the commonest tree species are Bucidabuceras, Prunusamygdalus and Delonixregia available at 34%, 28% and 8% respectively. Log measurement and grading showed that 54% are low-grade trees, while70% satisfy girth requirement, only 28% met merchantable height requirement for regular sized dimension lumbers for plywood production. The findings suggest that most of the wood may not be used for flooring and high value furniture but could be suitable as pulpwood, decorative items, wood-based panel products, medicinal and other low-value building construction purposes.
Proceedings for the Innovative Solutions for Affordable Housing Symposium: Academic Session 2, 2024
Senescent fruit trees have structural potential but are limited by short trunks and small girths,... more Senescent fruit trees have structural potential but are limited by short trunks and small girths, necessitating their use in engineered wood products (EWPs). However, information on their viability as EWPs for affordable housing is sparse. This study assesses the flexural performance of cross-laminated Mangifera indica. Samples were collected and air-dried. The manufacturing process involved crosscutting, planning, adhesive application, panel lay-up and assembly pressing. Preliminary tests were conducted. The samples were loaded in-plane, and their flexural properties were evaluated. ANOVA was performed on the flexural properties of solid wood, CLT (major axis), and CLT (minor axis) at P = 0.05. A gazebo was designed, and a scaled-down model was fabricated. The average MC and density were 10.03% (±1.49) and 579.45 kg/m3 (±70.99) respectively. The average MoE for the solid specimen was 23484.86 MPa (±3238.83), and the average MoR was 64.91MPa (±15.83). The average MoE of CLT samples loaded in the minor strength axis was 16945.821Mpa (±2389.66), and the average MoR was 44.69MPa (±22.62). The average MoE for the CLT in the major strength direction was 13981.72Mpa (±8057.40), and the average MoR was 15.09MPa (±10.41). ANOVA revealed significant differences: solid wood had the highest strength and stiffness, while CLT (major axis) was the weakest. Although solid M. indica exhibited significantly higher strength and stiffness, attributable to weak interfacial bonding in glue lines, CLT values remained within the acceptable range for structural applications, indicating that CLT can increase span from short trunk M. indica trees without excessively compromising strength, suggesting promising applications for innovative construction.
Repositioning Forestry For Sustainable Ecosystems and Livelihoods, 2022
Generations of supplementary raw materials in form of composites from wood waste residue offer op... more Generations of supplementary raw materials in form of composites from wood waste residue offer opportunities for reducing exploitation pressure on forest resources. For coordination and impact measurement however, there is need to document information of the prospects and challenges of adopting this sustainability measure
to effectively harness the approach to mitigate the effects of climate change and forest resources supply shortage. This study examines the grey areas, limiting it to prospects and challenges, of adopting the aforementioned technique in Nigeria. A review of related literature on predominant wood waste sources and composite products were carried out. Local sources and nature of wood waste in Nigeria were also identified through the secondary data. Information revealed that most wood wastes used for composites are directly sourced from forests (30.43%) while the least source is from old household furniture (4.35%). This perhaps is an indication that wood wastes generated in the forest exceed those generated at other locations. Reconstituted wood composites are the most common wood waste composite products (66.67%) that have been adopted in Nigeria. Reasons are largely due to
nature of wood wastes and technological capacity. The feasibility of this approach is reliant on investment in industry by local manufacture of composite processing equipment and facilities, as well as creating an environment that is conducive for the industry to thrive.
Proceedings of the Forestry Association of Nigeria, 2022 conference held in Akure on the 14th-18th March, 2022
Overexploitation of familiar economic wood species has resulted in scarcity that is further worse... more Overexploitation of familiar economic wood species has resulted in scarcity that is further worsening by demand-push inflation the consequence of which has been the risk of extinction of the category of wood resources. Lesser Familiar Wood Species (LFWS) have stepped in as alternatives but there is dearth of information on type, properties and form of LFWS usage. This study investigated the security of wood resources supply in relation to utilization and marketing at Lagelu Local Government Area, Oyo State, Nigeria. A survey was conducted in Lagelu LGA, Oyo State, Nigeria, using stratified random sampling to investigate the marketing patterns of wood materials, cost and quality issues of the wood offered for sale, species of wood and utilization patterns, and end users' perceptions of the suitability of LFWS. The collected data was analyzed using descriptive and quantitative statistical tools. Result shows that LFWS has a strong presence in the Lagelu wood markets (56.60 %). The cost of wood for sale varied according to species, size, and mode of conversion. Absence of information on the LFWS properties and the use of rule of thumb in LFWS selection for structural application suggested misuse in current utilization pattern and this is capable of impeding wood resource supply security lt applied at the study area. The study recommend development of baseline information through further research into properties of identified LFWS to guide their utilization so as to stem the tide of rising wood resource supply insecurity and to reduce the extinction rate of familiar economic wood species.
A Lead Paper Presented at 48th Annual Conference of Forestry Association of Nigeria,Held at , Bello Kofar Bai Conference Hall, Katsina State Secretariat, Katsina, Nigeria between 6th and 11th May, 2024 , 2021
Adeleke University Journal of Engineering and Technology, 2024
The Nigerian wood industry faces challenges of resource-intensive operations and ineffective wast... more The Nigerian wood industry faces challenges of resource-intensive operations and ineffective waste management. This study appraised Cleaner Production (CP) practices in selected wood processing facilities in Ibadan, Nigeria. Qualitative methods were used to understand facility workflows in three selected facilities. Data collection involved observations, interviews, and document review. Cause analysis focused on resource consumption, waste generation and their corresponding CP options. Thematic and crosscase analysis identified commonalities and variations in CP potential. The prospects and challenges of cleaner production in Nigeria were discussed using relevant literature. The CP compliance rate among the facilities was observed to vary from low to medium. Factors such as conversion equipment type, level of awareness, management capacity, and the cost of implementing cleaner production options were identified as key influencers of adoption rates in the region. Recommendations were provided to improve resource efficiency and waste management in the facilities. Ethical principles were followed, and findings were disseminated to promote sustainable practices in the wood industry.
PROCEEDINGS OF THE SUSTAINABLE, CLEAN & EMERGING ENERGY TECHNOLOGIES CONFERENCE, 23 – 28 JULY 2023, UNIVERSITY OF NIGERIA, NSUKKA, 2023
Wood residues generated in Nigeria amount to approximately 5.2 million tonnes annually, highlight... more Wood residues generated in Nigeria amount to approximately 5.2 million tonnes annually, highlighting the resource-intensive nature of the Nigerian wood industry. Cleaner production practices, which involve the identification and implementation of strategies to reduce raw material consumption, energy use, waste generation, and pollution, have been widely adopted in many countries. However, in Nigeria, the adoption of cleaner production practices remained limited. This study aims to review the potential impact of cleaner production practices in the Nigerian wood industry on productivity and the creation of a sustainable environment. It sheds light on the unique characteristics and challenges faced in the Nigerian wood industry that influence the widespread adoption of cleaner production practices. The study delved into the different phases of cleaner production implementation, emphasising the importance of planning, implementation, monitoring, and evaluation. It highlighted the adoption of low-cost and practical cleaner production measures, debunking the misconception that cleaner production implementation is always costly. Furthermore, the study examined the prospects and challenges of implementing cleaner production measures within the specific context of Nigeria's peculiarities. It discussed comprehensive waste management strategies, noise control measures, materials modification, and substitution, as well as the application of cleaner production practices on machinery and equipment. The paper emphasised the need for stronger policies and their enforcement to ensure compliance with cleaner production practices in the wood industry. By promoting the adoption of cleaner production measures, the country can witness enhanced productivity, minimise waste, and create a sustainable and environmentally friendly wood industry sector.
Forestry Association of Nigeria, 2019
This research is aimed at solving the problems of paper waste management in a developing country ... more This research is aimed at solving the problems of paper waste management in a developing country like Nigeria, at a cheap rate. Wood is rarely used as a material for constructing machine bodies. However, with advancements in wood products engineering, wood-based products can be easily engineered to desired specifications and can be useful for such applications. In this work, African Mahogany (Khaya ivorensis) was used for constructing the top cover and framework of the machine, while the body of the machine was constructed using High Density Fibreboard (HDF), in the replica of a 3D (Three dimensional) CAD (Computer Aided Design) designed by the researchers. Transmission system, cutting system and wood processing procedures were described in this work. The electric motor speed was 1450rpm before the gear ratio was introduced. Basic wood processing and metal machining processes were carried out during fabrication. The cutting blades of the machine was designed for cross cutting, which makes manageable sizes of shredded papers for ease of recycling and/or disposal. The components of the machine include: two shafts, 28 blades and spacers which were installed on one shaft, 29 blades and spacers on the other shaft, making a total of 57 blades for the cutting system of the machine. Wood and wood-based products served adequately as covering for the constructed machine with minimal noise at a cheap rate.
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Conference Presentations by David Adeniran
to effectively harness the approach to mitigate the effects of climate change and forest resources supply shortage. This study examines the grey areas, limiting it to prospects and challenges, of adopting the aforementioned technique in Nigeria. A review of related literature on predominant wood waste sources and composite products were carried out. Local sources and nature of wood waste in Nigeria were also identified through the secondary data. Information revealed that most wood wastes used for composites are directly sourced from forests (30.43%) while the least source is from old household furniture (4.35%). This perhaps is an indication that wood wastes generated in the forest exceed those generated at other locations. Reconstituted wood composites are the most common wood waste composite products (66.67%) that have been adopted in Nigeria. Reasons are largely due to
nature of wood wastes and technological capacity. The feasibility of this approach is reliant on investment in industry by local manufacture of composite processing equipment and facilities, as well as creating an environment that is conducive for the industry to thrive.