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Johnson, Nnadikwe
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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 1 
Sustainable Formulation of Phenol-Based Disinfectants for Industrial and Domestic Use Iheanocho prosper; Johnson, Nnadikwe; Chinemerem Joy Johnson
Journal Majelis Paspama Vol. 3 No. 02 (2025): Journal Majelis Paspama, 2025
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The formulation of effective and sustainable disinfectants is crucial for preventing the transmission of diseases and ensuring public health. This study focuses on the development of a phenol-based disinfectant formulation, with a specific emphasis on sustainability and efficacy. The formulation process involved mixing texapon, pine oil, phenol, chloroxylenol, isopropyl alcohol, and water in specific proportions, while varying the quantities of chloroxylenol (250g, 500g, 1000g, 1500g, and 2000g) and maintaining the quantities of water and isopropyl alcohol constant. The physical properties of the finished product, including pH, relative density, odour, and dispersion in water, were evaluated through comprehensive physical analysis. The study's findings provide valuable insights into the development of effective and sustainable disinfectant formulations, with potential applications in industrial, domestic, and healthcare settings. The research aims to contribute to the advancement of disinfectant technology, promoting public health and safety through the creation of efficacious and environmentally friendly disinfectant products.
Combined Treatment and Power Generation from fertilizer waste water Using Microbial Fuel Cell Onuabuchi Azunna; Akuma Oji; Obumneme O. Okwonna; Johnson, Nnadikwe
Journal Majelis Paspama Vol. 3 No. 02 (2025): Journal Majelis Paspama, 2025
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The increasing environmental problem of fertilizer wastewater associated by high loads of pollutants, necessitates the microbial fuel cell innovative treatment technologies that not only mitigate pollution but also generate power. This research investigates the dual-purpose application of Microbial Fuel Cells (MFCs)for thecombined treatment and power generation from fertilizer wastewater, offering a sustainable solution that integrates wastewater remediation with renewable energy production. The study explores the design, optimization, and performance evaluation of single- and dual-chamber microbial fuel cell systems using urea fertilizer wastewater as substrates. Key parameters including chemical oxygen demand (COD) removal efficiency, dissolve Oxygen, % ammonia and %Urea reduction, Current and power density were monitored under varying operational conditions (e.g., electrode materials, pH, temperature, retention time). Advanced electrochemical and microbiological techniques were employed to characterize the anodic biofilms and understand the dynamics of the electroactive microbial communities driving the simultaneous biodegradation and electron transfer processes. Result demonstrate that microbial fuel cell can achieve treatment of fertilizer wastewater (COD > 80%, ammonia > 70%) while generating stable output outputs up to 0.66MA and voltage of 0.91V, depending on reactor configuration and substrate concentration. The experimental result shows that Ammonia fertilizer plant effluent is one of the best substrates for energy generation in mfc. The integration of bio electrochemical systems with fertilizer industry effluents not only enhances wastewater treatment efficiency but also contributes to decentralized. This thesis provides a comprehensive analysis of the feasibility, challenges, and scalability of MFC technology for agro-industrial applications, contributing to the global pursuit of circular economy models and sustainable wastewater-energy nexus solutions.
Sustainable Production and Characterization of Biodiesel from Kitchen Waste Ezemonye Esther Chinaza; Ibe Raymond Obinna; Johnson, Nnadikwe; Iheme Chigozie
Journal Majelis Paspama Vol. 3 No. 02 (2025): Journal Majelis Paspama, 2025
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This study demonstrates the sustainable production of biodiesel from waste palm oil through alkaline transesterification, utilizing methanol and sodium hydroxide (NaOH) as catalyst. Under optimal conditions (200 ml methanol and 16 g NaOH per liter of waste oil), an 85% biodiesel yield was achieved. The physicochemical properties of the biodiesel, including density (0.87 g/cm³), viscosity (4.5 mm²/s), flash point (160 °C), cetane number (52), and acid value (0.45 mg KOH/g), meet international standards (ASTM D6751, EN 14214). The results show that waste palm oil is a viable, low-cost, and environmentally friendly feedstock, offering a promising alternative to fossil diesel. The study employed a combination of transesterification, settling, and washing processes to produce high-quality biodiesel. This research contributes to sustainable urban waste management and highlights the potential for biodiesel production from waste oils in developing countries, providing a pathway towards renewable energy and reduced environmental impact.
Comparative Efficacy of Plant Leaves in Remediation of Crude Oil Polluted Silty Soil Johnson, Nnadikwe; Otaraku, Ipeghan Jonathan; Oji Akuma; Samuel Nwaozuzu
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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This study compared the efficacy of Jatropha curcas and Vernonia amygdalina leaf extracts in bioremediating crude oil-polluted silty soil through composite bioaugmentation. Wet-blended extracts (with P. aeruginosa, S. aureus, E. coli) achieved >50% contaminant reduction in 40 days. Predictive models (Minitab) explained remediation outcomes, highlighting the potential of these plant extracts as eco-friendly agents for silty soil restoration in Ogoniland, Niger Delta, Nigeria. The study investigated the comparative efficacy of Jatropha curcas and Vernonia amygdalina leaf extracts in bioremediating crude oil-polluted soils through composite bioaugmentation. The leaf extracts, harboring P. aeruginosa, S. aureus, and E. coli, were prepared via sun drying, room drying, and wet blending, and applied to contaminated sandy, loamy, and silt soils. Results showed that wet-blended extracts demonstrated superior remediation performance, achieving over 50% reduction in contaminant levels. Treatment with 10-40g of leaf extract over 40 days significantly reduced contaminants, with optimal results observed in sandy soils. Using Minitab software, predictive models were developed to estimate the impact of leaf mass, treatment time, and soil pH on the remediation of hydrocarbons, lead, zinc, and chromium. The models were statistically significant (p < 0.05) with good explanatory power (high R²), indicating their potential for predicting remediation outcomes. These findings highlight the potential of Jatropha curcas and Vernonia amygdalina as effective bio-remediation agents for crude oil-polluted soils, offering a sustainable solution for environmental restoration.
Phytoremediation of Crude Oil Polluted Sandy Soil using Plant Leaves: A Comparative Study Johnson, Nnadikwe; Otaraku, Ipeghan Jonathan; Oji Akuma; Samuel Nwaozuzu
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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This study evaluates the comparative efficacy of Jatropha curcas and Vernonia amygdalina leaf extracts in phytoremediating crude oil-polluted sandy soil. Leaf extracts containing P. aeruginosa, S. aureus, and E. coli were prepared via sun drying, room drying, and wet blending. Wet-blended extracts (10-40g, 40 days) achieved significant reductions: - Hydrocarbons: 2.40 μg/mL (Vernonia amygdalina), 2.11 μg/mL (Jatropha curcas). Lead (Pb): 0.99 μg/mL (Vernonia amygdalina), 0.72 μg/mL (Jatropha curcas). - Zinc (Zn): 0.71 μg/mL (Vernonia amygdalina), 0.51 μg/mL (Jatropha curcas). Predictive models (R² > 0.875) developed using Minitab software demonstrate the impact of leaf mass, treatment time, and soil pH on remediation. Results highlight the potential of these plant extracts as sustainable bio-remediation agents for crude oil-polluted sandy soil, offering an eco-friendly solution for environmental restoration.
Enhancing Lubricating Oil Performance Through the Integration of Viscosity Improvers in Mono-Grade and Multi-Grade Blends Johnson, Nnadikwe; Iheme Chigozie; Samuel Nwaozuzu; Tare Caroline Gillow
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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This study focuses on enhancing lubricating oil performance through the integration of viscosity improvers in multi-grade blends. A systematic approach was followed to formulate a high-performance multi-grade engine oil, starting with 5 liters of base oil and 1 liter of paraffin oil (100N). Additives (0.42 kg, 7% of the total blend) including Aspen, Tackifier, anti-wear, corrosion inhibitors, detergents, dispersants, and antioxidants were meticulously measured and added to the mix. The mixture was heated to 70°C to facilitate reaction between the base oil and additives, and then cooled to room temperature (around 30°C). Subsequently, 0.5 kg of viscosity index improver was introduced into the mixture, followed by the addition of 5 grams of dye. Quality control tests were conducted to ensure compliance with Standard Organization of Nigeria (SON) standards. The results showed that the product met the stringent specifications outlined by the regulatory body, demonstrating reliability and performance. This study highlights the importance of viscosity improvers in enhancing lubricating oil performance and meeting industry standards.
Natural Gas dehydration methods-Challenges and fixes Onuoha fidelis wopara; Johnson, Nnadikwe; Momoh abdulazeez adeyemi; Stephen Oyelami
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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Natural gas dehydration is a crucial process in the energy industry, ensuring pipeline quality gas that meets stringent specifications for transmission and distribution. This research examines key technologies employed in natural gas dehydration, including glycol absorption, desiccant adsorption, solvent salt adsorption, chemical cooling, and hydrate suppression. Among these, glycol absorption remains the most widely used method, particularly in large-scale gas processing operations. However, it faces significant challenges such as emissions, glycol losses, and degradation, particularly in Nigeria's gas fields and storage facilities, impacting operational efficiency and environmental compliance. Desiccant adsorption offers high dehydration efficiency, achieving very low water dew points, but requires effective regeneration strategies and is often limited to specific applications due to cost and complexity. Other methods like solvent salt adsorption, chemical cooling, and hydrate suppression have niche applications but are less prevalent for mainstream gas dehydration. This study focuses on optimizing glycol absorption systems, addressing prevalent issues, and proposing practical solutions to enhance gas processing performance. It details the technology's process flow, operational challenges, and potential fixes for improving dehydration efficiency, reducing emissions, and minimizing losses. Key aspects like glycol circulation rates, regeneration systems, and contamination management are analyzed to provide a comprehensive understanding of the process.
Unveiling the Transformative Potential of Semi-Lean Flows on Gas Purification Units and Unlocking Energy Utilization: A Comprehensive Analysis of MDEA-Based Processes Johnson, Nnadikwe; Momoh abdulazeez adeyemi; Onyewudiala Ibeawuchi Julius
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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  This study explores the impact of semi-lean amine streams on energy consumption in gas purification units, focusing on Methyl Diethanolamine (MDEA)-based processes. By integrating an absorption column split stream and flash unit, we evaluate the potential energy savings and operational efficiency improvements. The results show that the split-flow design reduces amine flow rate from 4616 kmol/hr to 2622 kmol/hr, and total energy consumption decreases from 133,415,348 Btu/hr to 121,584,268 Btu/hr. Additionally, the reboiler duty is reduced from 112,744,989 Btu/hr to 104,574,974 Btu/hr. The integration of absorption column split stream and flash unit offers a promising approach to enhance energy efficiency, reduce operational costs, and minimize environmental impact
Boosting Carbon Capture in /Coal Plants with Pinch Analysis for Greener Energy Johnson, Nnadikwe; Iheme Chigozie; Momoh abdulazeez adeyem; Stephen Oyelami
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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  Boosting carbon capture in coal-fired power plants is crucial for achieving greener energy and mitigating climate change . Pinch analysis, a systematic optimization technique, enhances carbon capture efficiency by minimizing energy consumption and reducing environmental impact. In coal plants, achieving high-purity CO₂ capture is a key objective. Using a 30% MEA (monoethanolamine) solution for carbon capture introduces an initial energy premium of 17.6%. However, applying pinch assessment techniques results in a significant 12.3% reduction in overall energy consumption. This translates to a substantial 50% decrease in energy requirements for carbon capture operations. The implementation of pinch analysis enables coal-fired power plants to achieve an impressive 90% CO₂ capture efficiency, underscoring the potential of this approach to enhance sustainability and cost-effectiveness. By optimizing heat exchange networks and identifying optimal heat transfer points, pinch analysis reduces energy and water consumption in carbon capture processes. This systematic optimization contributes to operational efficiency improvements, paving the way for greener and more sustainable power generation practices. The use of pinch assessment techniques offers a pathway towards cleaner energy production, reduced environmental footprints, and compliance with global climate goals . By strategically matching hot and cold streams, coal plants can minimize resource usage while boosting carbon capture performance.
Sustainable Food Drying Enhancing Efficiency, Nutrition, and Waste Reduction in Food Production Johnson, Nnadikwe; Iheme Chigozie; Momoh abdulazeez adeyem; Stephen Oyelami
Journal Majelis Paspama Vol. 4 No. 01 (2026): Journal Majelis Paspama, 2026
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Food drying is crucial for ingredient innovation and product development. Recent breakthroughs in pretreatments, processes, and technologies like microwave and ultrasound drying have transformed the industry, boosting efficiency, preserving nutrients, and reducing waste. These innovations promote sustainability, enabling resource-efficient and technologically advanced food production. Wider adoption of these cutting-edge technologies is crucial to maximize their impact. By embracing modern drying methods, businesses can enhance sustainability, improve production, and increase profitability while preserving nutritional value. This study bridges research and practice, showcasing the benefits of modern drying technologies for sustainable food systems. By adopting these innovations, businesses can foster sustainability, reduce waste, and gain a competitive edge, paving the way for a more efficient and sustainable food future
Co-Authors Akuma Oji Chinemerem Joy johnson Ezemonye Esther Chinaza Ibe Raymond Obinna Iheanocho prosper Iheme Chigozie Momoh abdulazeez adeyem Momoh Abdulazeez Adeyemi Obumneme O. Okwonna Oji Akuma Onuabuchi Azunna Onuoha fidelis wopara Onyewudiala Ibeawuchi Julius Otaraku, Ipeghan Jonathan Samuel Nwaozuzu Stephen Oyelami Tare Caroline Gillow