ABSTRACT Hydrolysis of a complex medium (whole-wheat flour) using a mixed culture of Aspergillus. awamori and Aspergillus. oryzae was carried out for the purpose of producing a fermentation medium that can be used to produce industrial chemicals.. The experimentation was carried out in shake flasks as well as in a 10-litre fermenter and the results obtained in all cases indicated that the two microorganisms could cooperate together to hydrolyse both the starch and the protein in wheat flour c...
ABSTRACT In this study, the potential effects of animal derived organic manure (cow dung, poultry droppings), saw dust and NPK fertilizer on the bioremediation of petroleum hydrocarbon contaminated soil was investigated. The rate of biodegradation was studied for the period of 10 weeks under laboratory conditions. The biodegradation data were fitted to eight models, four of which are based on microbial growth rate and the other four based on order of reaction. Results obtained show that biore...
ABSTRACT Remediation of hydrocarbon polluted soil applying all existing techniques can be slow, expensive and requires close monitoring. Bioremediation and phytoremediation augmented bioremediation have been used to treat petroleum contaminated soil and even the difficult poly aromatic hydrocarbon polluted soil which takes longer time. What has not been studied was the effect of heavy metals present in petroleum which slows down the substrate degradation by microorganisms. After the prima...
Abstract Detailed characterization of relevant cell components modelling and model validation of the electrical power utilization and productivity estimation of a locally fabricated
ABSTRACT Biodiesel, defined as the monoalkyl esters of vegetable oils and animal fats, is becoming prominent among alternatives to conventional petro-diesel due to economic, environmental and social factors. Transesterification is the most preferred method of biodiesel production. Knowledge of transesterification reaction kinetic enables prediction of the extent of the chemical reaction (or the conversion) at any time under particular conditions. It is also essential in the optimization of op...
ABSTRACT Non edible oil sources have the potential to lower the cost of biodiesel. However, they usually contain significant high amounts of free fatty acids (FFA) that make them inadequate for direct base catalyzed transesterification reaction (where the FFA content should be lower than 3%). The present work reviews chemical re-esterification as a possible method for the pre-treatment of high FFA feedstock for biodiesel production. The effects of temperature, amount of glycerol, type and amo...
ABSTRACT Clean modern energy and improved waste management are two well-recognised challenges in the global transition to sustainable development. There exist synergistic opportunities in simultaneously tackling the two issues via the generation of bioenergy from suitable waste streams. This potential has been successfully exploited elsewhere in the world; however, South Africa, despite having significant potential, lags behind in the implementation of these technologies and the respective ...
ABSTRACT The development of a Cathodic Protection System for a mild steel pipe using a magnesium anode was investigated. The pipe was externally coated with three layers of polykene tape wrapping and the soil resistivity was determined using the Wenner four pin method; a value of 2177Ωcm was obtained. The design parameters for the developed Cathodic Protection System were: total current of 0.0153mA; current density of 0.01mA/m2; protection current of 0.0153mA; protection voltage of 0...
ABSTRACT In this work, the operation and performance of a novel Separation Tray Column under Vertical and Tilt conditions is presented. The Tray Column used for the work is a Downcomerless liquid initiated and controlled Valve Tray with capacity to shut portions of the tray lacking liquid at any time. To evaluate the mass transfer performance of this column, an oxidation experiment was conducted at 300C and the percentage of Fe (II) oxidised to Fe (III) from contaminated water by air was ch...
ABSTRACT A preliminary study was made on the effect of castor oil on the properties of polyether based polyurethane foam such as rising time, density, hardness tensile strength, compression, elongation and heat aging. The castor oil was introduced into the polyurethane foam by partially substituting it for silicone oil through seven experimental set up, based on the laboratory mix formulation on 5OOg polyether based polyol with 0%, 20%, 40%, 50%, 60%, 80% and IOO% castor oil substitutions.
_ABSTRACT -. Nigeria has for long been a developing nation without much progress. An observation of some of the countries of the world reveals a strong interplay between the quality of engineering education and the technological advancement of such country.
ABSTRACT Glutathione Peroxidase (GPx) family of enzymes plays important roles in the protection of organisms from oxidative damage. GPx converts reduced glutathione (GSH) to oxidized glutathione (GSSG) while reducing lipid hydroperoxides to their corresponding alcohols or free hydrogen peroxide to water. This study was conducted to investigate the possible effects of temperature in vivo on Glutathione peroxidase (GPX) oxidative activity in fish tissues.An adult fully grown cat fish, (the ...
ABSTRACT This work investigated the anaerobic digestion of cow-dung and cassava peels, the effect of co-digestion in biogas production and purification process for biogas upgrade. The biogas experiments were carried out in five different anaerobic digesters which contained cow-dung and cassava peels slurry in the (wt-wt%) ratios of (100:0), (75:25), (50:50), (25:75), (0:100) and were incubated for a 30-day period at ambient temperature. Combined absorption and adsorption process was used to p...
ABSTRACT The project research entailed the production of high quality sealant incorporating a local raw material for sealing holes and gaps in various materials like metal and plastic. Two samples of acrylic sealants were produced, the first samples which is the standard formulations involved the use of silica gel as a major adhesion promoter and the second samples which is the research formulations involved the use of sand (sharp colourless sand with 59% silica/silicondioxide composition)) a...
ABSTRACT Pausinystalia yohmibe is a member of thefamilyRubiaceae. It is a valuable medicinal tree, distributed in evergreen closed canopy forests in West Africa. It is traditionally used for treatment mostly on erectile dysfunction. This research was carried out to evaluate the immunomodulatory effect of (Pausinystalia yohmibe) stem bark methanolic extract. The yohimbe extract has been reported for its medicinal use for the treatment of impotence in men and for its anti-oxidants effects bu...