Andrew Nosakhare Amenaghawon

University of Benin · Department of Chemical Engineering

Traditional ethanol fermentation becomes inhibitory to microbial growth at ethanol concentrations that depend on the producer organism, leading to reduced ethanol productivity. Continuous ethanol removal from the fermenter could increase productivity and potentially reduce the cost of product recovery. In this work, continuous ethanol removal via i...

Citric acid production from hydrolysed corn starch was optimized in this study. Response surface methodology (RSM) was employed for the analysis of the simultaneous effect of substrate concentration, broth pH and fermentation temperature on the concentration of citric acid produced during fermentation of hydrolysed corn starch. A three-variable, th...

The dilute sulphuric acid hydrolysis of cassava bagasse was investigated in this study under the following conditions: acid concentration (0.5-2.5%w/w), temperature (100-130⁰C), time (5-40 minutes) and liquid to solid ratio (10-30 mL/g). Results of chemical composition analysis of the bagasse showed that the major components of the cassava bagasse...

Stratified gas-liquid flow is a flow regime commonly encountered in horizontal and slightly inclined pipelines. It is generally considered to be a prerequisite for severe slugging in pipeline-riser systems. The motivation for the work discussed in this paper stem from the widespread presentation of multiphase flow regime maps in terms of superficia...

This study focuses on optimizing microbial processes for producing nitrogenous polysaccharides, specifically chitin and chitosan, from crustacean waste using response surface methodology. Lactococcus lactis and Lactobacillus paracasei were employed as microbial strains to assess the effects of key process variables: temperature, time, and substrate...

This research proposes a framework for modeling and comparing two electricity scenarios for Nigeria by 2050, focusing on the inclusion and exclusion of electricity storage technologies. A Central Composite Design (CCD) was used to generate a design matrix for data collection, with EnergyPLAN software used to create energy system simulations on the...

The growing demand for sustainable food packaging and the increasing concerns regarding environmental pollution have driven interest in biodegradable materials. This paper presents an in-depth review of the production of Polyhydroxyalkanoates (PHA), a biodegradable polymer, from food waste. PHA-based bioplastics, particularly when derived from low-...

Barite is an inorganic mineral mainly constituted by barium sulfate (BaSO4) which finds applications across a variety of industries. Low quality barite can be beneficiated to meet high-purity requirement. Thus, in this work, we developed an optimum beneficiation process for upgrading barite-bearing ore from Azare in Bauchi State, Nigeria. The optim...

The present study applied atmospheric and room temperature plasma (ARTP) mutagenesis to improve Bacillus cereus strain for neutral proteinase production. The selected improved stable strain, Phe−Tyr-ARTP-60-E demonstrated a 2.88-fold enhanced proteinase yield and 2.81-fold enhanced proteinase activity with shortened fermentation time. An artificial...

Background Vaginal dysbiosis, a change in the beneficial vaginal microbiome, leads to a significant depletion in the essential lactobacilli thus increasing the possibility of vaginal infections such as bacterial vaginosis. Probiotics have gained more attention as a means of delivering exogenous lactobacilli but one of the challenges in delivery str...

The vegetative part of the rice plant, Oryza sativa L., that remains after paddy fields have been cleared during harvest or afterward is known as rice stubble. Carboxymethyl Cellulose from Rice Stubble (CMCr) is a promising biopolymer source that can be made from rice stubble waste. Carboxymethyl cellulose was synthesized from rice stubble by a sol...

Electrospinning has emerged as one of the major technologies for designing and fabricating tissue engineering membranes. The resemblance of the electrospun fiber structure to blood capillaries endowed them with unique capabilities to mimic the native tissue biological characteristics, while the high surface‐to‐volume ratio enables them to exert a c...

In this study, the focus was to produce xanthan gum from pineapple waste using Xanthomonas campestris. Six machine learning models were employed to optimize fermentation time and key metabolic stimulants (KH2PO4 and NH4NO3). The production of xanthan gum was optimized using two evolutionary optimization algorithms, particle swarm optimization, and...

Anaerobic digestion of multiple substrates can generate more biogas while remaining stable, if positive synergistic effects are achieved. The type of co-digested substrates and the mixing ratio used, are the most important variables as each substrate has unique set of characteristics. Optimizing the volume ratios by testing various substrate mixing...

This study aimed to optimize the production of particle boards from agricultural waste (sawdust). The physical properties studied were Water Absorption (WA), Thickness Swelling (TS) and Linear Expansion (LE). The production of particle boards was investigated under the following conditions: stacking time (14-21 days), resin loading (386-463 g) and...

Peptidases, which constitute about 20% of the global enzyme market, have found applications in detergent, food and pharmaceutical industries, and could be produced on a large scale using low-cost agro-industrial waste. An acidophilic Bacillus cereus strain produced acidic peptidase on binary-agro-industrial waste comprising yam peels and fish proce...

Unlabelled: In recent times, L-asparaginase has emerged as a potential anti-carcinogen through hydrolysis of L-asparagine in the blood for anti-leukemic application, and in carbohydrate-based foods, for acrylamide reduction applications. In this study, Aspergillus sydowii strain UCCM 00124 produced an L-asparaginase with a baseline acrylamide redu...

The aim of this research work was to optimize the production of particle boards from agricultural waste (wood chips). The mechanical properties investigated were the modulus of elasticity (MOE) and modulus of rupture (MOR). The production of particle boards was investigated under the following conditions: stacking time (14-21days), resin loading (3...

Bacterial vaginosis (BV) is an infection of the vagina associated with thriving anaerobes, such as Gardnerella vaginitis and other associated pathogens. These pathogens form a biofilm responsible for the recurrence of infection after antibiotic therapy. The aim of this study was to develop a novel mucoadhesive polyvinyl alcohol and polycaprolactone...

Interest in the use of metal–organic frameworks (MOFs) for the sequestration of pollutants from aqueous media has been increasing in recent times because of the very desirable properties of MOFs, such as eco-friendliness, large surface area and pore volume, hierarchical structures, and tunability of its properties. This work presents a critical and...

Human and animal waste, including waste products originating from human or animal digestive systems, such as urine, feces, and animal manure, have constituted a nuisance to the environment. Inappropriate disposal and poor sanitation of human and animal waste often cause negative impacts on human health through contamination of the terrestrial envir...

Human and animal waste, including waste products originating from human or animal digestive systems such as urine, feces, and animal manure, have constituted a nuisance to the environment. Inappropriate disposal and poor sanitation of human and animal waste often cause negative impacts on human health through contamination of the terrestrial enviro...

Anaerobic digestion (AD) is a proven technology for treating biomass materials with a view of producing bioenergy and recovering nutrients. Cattle rumen content (CRC) is an example of a waste biomass material that can be a viable feedstock for AD process. This paper accesses the availability and energy generation potential of cattle rumen content (...

Anaerobic digestion (AD) is a waste management method worldwide, that results in biogas and digestate production. The digestate remains is a potential biofertilizer but may fall short of vital nutrients required for optimal plant growth, hence, requires amendment with other biomass residues. This study was aimed at investigating the microbial quali...

Protoplast fusion is one of the most reliable methods of introducing desirable traits into industrially-promising fungal strains. It harnesses the entire genomic repertoire of fusing microorganisms by routing the natural barrier and genetic incompatibility between them. In the present study, the axenic culture of a thermo-halotolerant strain of Asp...

Valorization of bioresources is now an important route for producing many useful industrial and domestic products. In particular, the derivation of fermentation products from waste biomass materials has significant economic importance. Thus, the objective of this study was to assess the potential of enhancing citric acid production from yam peels b...

Bacterial vaginosis, a polymicrobial clinical syndrome characterized by a shift in healthy vaginal microbiota due to bacterial colonization, is characterized by high recurrence rates after conventional treatment with an antimicrobial agent. This has necessitated the need to develop a formulation that has the potential to ensure Lactobacilli viabili...

In this study, extract from Manihot esculenta was evaluated as an ecofriendly coagulant for treating turbid wastewater. Chemical and morphological characterization of the coagulant was performed using field emission scanning electron microscopy (FESEM) with energy dispersive spectroscopy (EDS) and Fourier transform infrared (FTIR) spectroscopy. The...

We report herein a flexible, light and electrically conductive composite film based on polyvinyl alcohol (PVA) matrices. Cellulose nanofibers (CNFs) were used as reinforcement to improve the mechanical properties of the PVA. Addition of silver nanowires (AgNWs) was crucial in enhancing the thermal stability and conductivity of the resulting PVA/CNF...

Bio-based waste materials are important sources of elements such as calcium and potassium that can be used as active phases for preparing heterogeneous catalysts for biodiesel production. In this study, the potential of a composite bio-based heterogeneous catalyst of fused crab shell and plantain peels was assessed for the transesterification of wa...

Anaerobic digestion (AD) of organic wastes results in biogas and digestate production. The digestate from AD may fall short of vital nutrients required for an optimal plant growth due to feedstock quality. Thus, digestate amendment with biomass and aerobic metabolic activities becomes an essential process for nutrient enhancement. This study aimed...

This study investigated the batch co-digestion of cattle rumen content (CRC) and food waste (FW) for biogas production in different ratios (CRC:FW) to assess biogas production and process stability. The results showed that CRC and FW possess characteristics that are desirable for biogas production as seen in their respective total solids (10.85 and...

In this study, a ternary substrate mix made up of coconut pulp waste, banana peels and pineapple peels was optimally formulated to produce lipase. The optimum mix of coconut pulp waste (7.46 g), banana peels (0.01 g) and pineapple peels (7.53 g) gave a maximum lipase activity of 339.4 U/gds. The effect of inducers (castor oil, jatropha oil and oliv...

Curcumin is a primary polyphenol of the rhizomatous perennial plant called Curcuma Longa. Curcumin interferes favorably with the cellular events that take place in the inflammatory and proliferative stages of wound healing, hence its importance in skin regeneration and wound healing. Curcumin is however lipophilic, and this must be considered in th...

Hydroxyapatite (HAp) is a calcium phosphate material that was used primarily in bone regeneration and repair as a result of its chemical similarity with bone. However, HAp has emerged as a very promising adsorbent for sequestering contaminants like heavy metals, dyes, hydrocarbons as well as other emerging pollutants from wastewater as a result of...

Previous studies have explored the potential of pomace valorization, with an emphasis on the transformation of polysaccharide biopolymers of pomace-cellulose and hemicellulose to produce high-value bioproducts such as microcrystalline cellulose. Notably, opportunities for the exploration of the biopolymer of pomace-lignin for its employment in biom...

Meeting the Paris Agreement targets is challenging because a high proportion of the global energy generation is based on the combustion of fossil fuels. Carbon capture and storage is expected to provide a cost-effective means of reducing CO2 emission from the fossil fuel-fired power sector. In recent times, natural gas has become the most preferred...

Waste biomass can be converted to green fuels and value-added products via thermochemical and biological conversion processes. The thermochemical processes endure limitations such as high processing costs due to high-temperature requirements. In contrast, the challenges of biological processes include low product yield and long processing time. Int...

Biomass pyrolysis has been the focus of study by several researchers as a viable means of producing biofuels and other useful products. This paper gives a comprehensive, elaborate and updated review of pyrolysis technology as an efficient thermochemical route for biomass conversion. Pyrolysis products include pyrolytic gas, bio-oil, and solid bioch...

This study investigated the production of biodiesel from waste vegetable oil using iron-doped solid catalyst produced from cow horn. The catalyst was characterised using scanning electron microscope (SEM) coupled with energy dispersive X-ray (EDX), X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, Br...

Wastewater produced from many industrial processes is characterized by high levels of turbidity which is usually an indication of the level of pollution. Coagulation coupled with flocculation has been reported to be one of the efficient ways of treating turbid wastewater. Thus, this work evaluated the potential use of Ipomoea batatas leaves extract...

Lipases are a class of triacylglycerol hydrolases which have found a lot of applications as a result of their unique characteristics such as stability, specificity, economic attractiveness etc. This study examined the effect of some microbial stimulants (olive oil, MgSO4 and KH2PO4) on the production of lipase from waste cooking oil (WCO). The ferm...

The use of wastes for biogas production has been restricted to few feedstock like cattle manure and food waste. Increasing the feedstock base for biogas production is capable of increasing the sustainability of feedstock availability. This study seeks to assess sociocultural and acceptability issues associated with the use of faecal waste (human ex...

The use of biofertilizers as a viable substitute for chemical fertilizers is increasingly gaining attention as a very important source of nutrient supply to plants. Biofertilizers are eco-friendly and economical with potential for wider agricultural applications. This is due to the several benefits accruable from the use of biofertilizers in terms...

Methane can be converted into other useful products such as H2 and liquid fuels to reduce its environmental impact. Due to majorly high energy requirements and the endothermic nature of the reforming process, catalysts are essential. The catalyst preparation method is one of the aspects that can improve the catalytic performance by enhancing the ca...

The introduction of polysaccharides to functional nanomaterials has continued to be a subject of research interest with several research studies available in the literature due to their potential applications especially in the field of nanomedicine. These research findings have led to the development of advanced bionanocomposites that utilizes the...

Background Efficient and effective chemotherapeutic methods designed to prevent the continuous spread of HIV/AIDS is essential to break the cycle of new infections. The use of condoms has been seen to be effective in prevention of HIV and STIs but its lack of use especially in vulnerable population is a deterrent to its overall success as a control...

A three variables full factorial design was use to optimize the yield of bioactive components of Tetrapluera tetraptera fruit extract. This study using extraction temperature, particle size, extraction time, considered for experimental design. During the optimization of the extraction process parameters, the yield was optimized to obtain 30.545% wh...

Oxalic acid is one of the important organic acids produced by fermentation and its production is affected by several factors. This study investigated the effect of three independent variables namely; potassium dihydrogen phosphate (KH2PO4), magnesium sulphate (MgSO4) and sodium nitrate (NaNO3) and their mutual interactions on oxalic acid production...

Biogas produced from anaerobic digestion of organic wastes consists of mainly methane (CH4) and undesirable gases like carbon dioxide (CO2), hydrogen sulphide (H2S) and other trace gases. This study focused on the modelling and optimisation of biogas upgrading using high pressure water scrubbing (HPWS). The biogas upgrading process was simulated us...

A Cr(VI)-imprinted-poly(4-VP-co-EGDMA) (IIP) was proposed to be used in the process of selective extraction of low concentration of Cr(VI) ion from aqueous solution. The polymer was synthesized by using Cr(VI) ion as a template, 4-vinylphiridine (4-VP) as complexion agent and monomer, ethylene glycol dimethyl acrylate (EGDMA) as cross-linker, benzo...

Corrosion is one of the problems that is often found in daily life especially in petroleum and gas industry. Carboxymethyl chitosan-(CMC-) benzaldehyde was synthesized as corrosion inhibitor for steel. Corrosion rate was determined by potentiostatic polarization method in HCl 1 M. Dripping and coating, two different treatment, were used to drop and...