CHUKWUEMEKA PETER UKPAKA - Academia.edu (original) (raw)

Papers by CHUKWUEMEKA PETER UKPAKA

Zenodo (CERN European Organization for Nuclear Research), Apr 1, 2023

This study was carried out to evaluate the potential of fermented Guava Leaf (Psidium guajava) fl... more This study was carried out to evaluate the potential of fermented Guava Leaf (Psidium guajava) fluid extract in bioremediation of crude oil polluted soil. For this purpose, 6reactors were set up and labelled R1 to R6, with R6 as the control. 2kg of soil sample was polluted with 150ml of crude oil and the remediant was added to each reactor. The volume of remediant were varied at increasing order of 20ml to 100ml from R1 to R5. R6 contains no remediant. Samples were taken and analyzed at 4days interval for total petroleum hydrocarbon (TPH) and nutrient content. The study lasted for 20days. At the end of the study period, there was 75.65% and 91.95% decrease in the concentration of TPH in R1 and R5, with the lowest and the highest respectively, compared to 18.44% decrease in R6. Similarly, there was a gradual decrease in the concentrations of total organic carbon, nitrogen, phosphorus, and potassium in all samples. The transient growth of the bacteria and fungi was monitored with respect to the degradation rate of the substrate in each batch bioreactor and the result obtained demonstrates the following phases, lag, progressive or exponential, stationery and death or decline. This reveals the theory of Monod's model indicating decline in a viable nutrient and substrate utilization in each bioreactor. This research has demonstrated that psidium guajava possess the characteristics of good biostimulant enhancing bioremediation of polluted soil environment.

African Journal of Bacteriology Research, Mar 31, 2011

In this paper, mathematical models were developed to simulate the inhibition effect of some physi... more In this paper, mathematical models were developed to simulate the inhibition effect of some physicochemical parameters on the biodegradation rate of aromatic compounds in the presence of low and high concentration of salinity. The inhibitive effects of salinity, in this case, were investigated. The aromatic compounds were obtained from an oil-servicing firm in Port Harcourt, and the microbial analysis was conducted on the water samples for the purpose of identification, isolation and characterization of the Pseudomonas putida. A head-to head comparison of the degradation rates of toluene, phenol and benzene in fresh medium was done based on the data obtained from experiments conducted. The result showed that salinity did not inhibit the degradation rate of toluene and benzene. However, phenol was significantly affected by salinity. The aromatic compounds removal from water solution varied depending on the conditions, that is, the type of compound, the composition of the water solution and the conditions of their exposure. The results obtained from this investigation was compared with Suietlik et al. (2002) work which revealed 22 to 28% reduction in aromatic compounds degradation while the present research shows 45-75% reduction in aromatic compounds under investigation for a period of 2 weeks (21 days) exposure. The parameters form the bedrock for further improvement of the kinetic models and also, serve as an outline for possible pilot-scale bioremediation by engineers.

A regression analysis model was developed to examine the reliability and the acceptability of the... more A regression analysis model was developed to examine the reliability and the acceptability of the sun-dried and room-dried <em>Azadirachta indica</em> leaves for the remediation crude oil contaminated soil in Niger Deltal, Nigeria. An experimental approach was used to monitor the concentration of the total petroleum hydrocarbon (TPH) degradation that was enhanced in the presence of the microbes in the reactor. A regression analysis was performed to evaluate the reaction behavior microbes in reactor for the remediation of the TPH in the presence of sun-dried and room-dried <em>A. indica</em> leaves in sandy and loamy soils contaminated with 100 ml of crude oil. The physicochemical properties of control loamy soil was as; pH (6.75), electric conductivity (10.36 µS/cm), total oxygen (2.99%), total Nitrogen (0.091%), potassium (36.82942%), phosphorus (15.36%) and total bacteria (2.15×10²cfu/g). Whereas, these values were as pH (6.82), elec...

The control of corrosion of metal and its alloy dissolution in environments that induce corrosion... more The control of corrosion of metal and its alloy dissolution in environments that induce corrosion has been reviewed showing successes recorded in the search for alternative inhibitors that would replace toxic and expensive inhibitors that in some instances require rigorous process of synthesis. Studies show that organic compounds, drugs, polymers and extracts from plant have been used. It also shows that in an effort to improve the efficiency of the developed inhibitors quite a number of them have been synergized with halide ions and surfactants. The mode of adsorption mechanism for majority of the tested inhibitor alternatives is also highlighted.

The basic particle electron obeys various theories like electrodynamics, quantum mechanics and sp... more The basic particle electron obeys various theories like electrodynamics, quantum mechanics and special relativity. Particle under different experimental conditions behaves differently, allowing us to observe different characteristics which are the basis for this work. In this paper, we have made an attempt to predict the energy quantum of an electron in an orbit using hydrogen, lithium and sodium atom as a base. It is difficult to find structure of electron experimentally, a mathematical attempt to predict the energy quantum number of an orbit when not in motion, was developed to study the atom with same number of orbits, different atomic numbers and observed that an increase in orbits has a major effect on the energy level. An attempt has been made to give a model that predicts the energy quantum of an electron in an orbit, the focus of these work is to develop a mathematical model that can predict energy quantum of electron in an orbit.

The biodegradability of Total Petroleum Hydrocarbon (TPH) in loamy soil amended using neem root e... more The biodegradability of Total Petroleum Hydrocarbon (TPH) in loamy soil amended using neem root extracts was investigated in this study. The neem roots were soaked separately into predetermined volume of water to extract liquids from the roots. The solution of neem-water and extract was then used as treatment to remediate crude oil polluted loamy soil. The loamy soil was used for this study. The physicochemical properties of the loamy soil before pollution, after pollution and at the 84^th day of treatment were determined, while analysis for the total bacteria count and TPH were carried out for 84^th days at 14 days interval. Density, electrical conductivity (EC), moisture content (MC), total organic carbon (TOC), total nitrogen (TN) and phosphorus (P) in the soils increased after pollution, except for pH, which was the opposite. However, density, EC, MC, TOC, TN and P decreased remarkably with time under treatment, while pH increased from...

European Journal of Engineering and Technology Research, 2018

This research outlines the microbial and substrate interaction in a plug flow bioreactor system f... more This research outlines the microbial and substrate interaction in a plug flow bioreactor system for effective utilization of the substrate by the microorganism. To achieve this mathematical models were developed to monitor, predict and simulate the interaction characteristics of the bioreactor using the functional parameters for interaction of microbial and substrate concentration in a plug flow reactor system. The MATLAB computer program language was used to determine the interaction relationship between the substrate and microbial concentration upon the influence of bioreactor volume, space time and discharge time. The characteristics of the behavior in terms of decrease in substrate concentration with increase in microbial concentrate revealed the interaction in the bioreactor with recycle.

The effectiveness of pH and microbial activities on the sun-dried and room-dried Azadirachta Indi... more The effectiveness of pH and microbial activities on the sun-dried and room-dried Azadirachta Indica leaf was monitored to examine the significance of their roles in crude oil degradation in different soil environments.The examination was conducted by varying quantities, in the remediation of sandy and loamy soils contaminated with 100ml of crude oil. Gas Chromatography-Mass Spectrometry method was used to test for the physicochemical properties of the materials used for the experiment. The unpolluted loamy soil was observed to contain pH of 6.75, electric conductivity of 10.36µS/cm, Total Oxygen content of 2.99%, Total Nitrogen of 0.091%, potassium content of 36.82942%, phosphorus content of 15.36% and Total Bacteria count of 2.15×10 2 cfu/g. Likewise, The unpolluted sandy soil was observed to contain pH of 6.82, electric conductivity of 21.48µS/cm, Total Oxygen content of 1.18%, Total Nitrogen of 0.036%, potassium content of 24.03681%, phosphorus content of 5.18% and Total Bacteria...

The model equation for the sorption of urease in a fluidized bed reactor was developed taking int... more The model equation for the sorption of urease in a fluidized bed reactor was developed taking into consideration gradient and temperature gradient across the bed height. The ordinary differential equation obtained was simulated using MATLAB (7.9.0 4D) and it was observed that concentration gradient changes across the bed. Urease Test determine the ability of microorganisms to degrade urea by means of the enzyme urease. The equation for the modelling of the Biokinetics of urease sorption using fluidized bed reactor was used to study the effects of both the concentration and temperature of the urease in the bed of reactor height. The obtained differential equation was simulated using MATLAB (7.9.0 4D) and it was observed that the concentration of urease and temperature changes across the bed. Finally, the results obtained reveals the usefulness of MATLAB – 7.9.0 4D computer programme language for monitor, predicting and simulation of biokinetics model for urease sorption in a fluidize...

This study is an investigation into the degree of salinity of rivers in Bayelsa State. The rivers... more This study is an investigation into the degree of salinity of rivers in Bayelsa State. The rivers chosen were Brass, Nembe, Sangana and Ukubie all in Bayelsa State. Rivers samples were collected and their Salinity levels determined using the total dissolved solids methods in which the water samples were evaporated to dryness and the residual salt weighed. Their results in g/l was converted to parts per million (ppm). The result of the analysis showed that Brass river water at 22,000 ppm, Sangana River had a salinity level of 13,700 ppm, Ukubie Creek River had a salinity level of 20,000 ppm and Nembe River 13,000 ppm. The density of the various water samples obtained are given as 1.25g/cm3, 1.28g/cm3, 1.41g/cm3 and 1.45g/cm3 for Nember, Sangana, Ukubie and Brass river water as well as the pH values are within the range of 7.21 to 7.51. The research demonstrates the usefulness of these rivers in the production of local salt within the Niger Delta of Nigeria.

Computer programme language of MATLAB software was used to monitor, predict and simulated the cha... more Computer programme language of MATLAB software was used to monitor, predict and simulated the characteristics of step input response on pneumatic proportional derivative controller with the concept of transfer functions. The prediction of step input response on pneumatic proportional derivative controller was examined using the concept of transfer function. A model equation was also developed to give account of the response of on pneumatic proportional derivative controller. The equation was developed to monitor the influence of restrictor on proportional derivative controller using the concept of transfer function. The effect of restrictor on the controller was monitored and predicted using the concept of Laplace transform and MATLAB 2007. Increase in the derivative pressure was observed with increase in response time. Key word: Prediction, step input response, pneumatic, proportional derivative controller, transfer functions.

Bag Filters play important role in the economy of modern industries that it is use for not only t... more Bag Filters play important role in the economy of modern industries that it is use for not only to control air pollution but to prevent waster and recycle materials back into the process. Because of the importance of Bag houses in industries, considerable effort has been done by scientists till now on the modeling of this unit for better understanding and improved productivity. To model and design a bag house we have to know the unknown kinetic parameters of the governing equations. The basic aim of this research is to state and compile the basic design equations for various units in the bag house and to prove that MATLAB and HYSYS can be used as a tool for the estimation of kinetic parameters of governing equations for a bag house and to check for its efficiency. The research work demonstrates the usefulness of this design in monitoring, predicting and simulating the significance of bag filter in controlling particles displacement into the air. Key words : Investigation, design, co...

Model for predicting the distribution parameter concentration of alkalinity and total hardness in... more Model for predicting the distribution parameter concentration of alkalinity and total hardness in stagnant water environment upon the influence of oil and gasemission was investigated in this paper. The model was formulated from the basic principle of mass and momentum concept which was resolved to obtain an ordinary differential equation. A mathematical tool known as the least square method was applied to resolve the differential equation to obtain quadratic equation based on thedistribution parameter concentration of alkalinity and total hardness in stagnant Water environment. Experimental data obtained from the analysis were fitted into the model to obtain their diffusivities and velocities of the parameters upon the influence of contaminants. Concentrations of the contaminants at the various depths were simulated and the polynomial of the curve was also established to ascertain the validity of the developed model. Simulated results from the model were compared analytically and g...

European Journal of Engineering Research and Science, Mar 19, 2019

This research work was conducted to demonstrate the mechanism of white board marker ink productio... more This research work was conducted to demonstrate the mechanism of white board marker ink production using locally sourced raw materials such as charcoal and used lube oil. In the production of the ink, the charcoal served as a pigment, used lube oil served as the primary binder or resin, ethanol served as solvent and gum Arabic served as an additive. The charcoal was obtained from processing of Mango, Oil bean (Ugba) and rubber trees, which were further crushed to their finest particles respectively and the used lube oil was obtained from mechanical engineering servicing unit of automobile engines. The crushed charcoal samples were characterized to determine the physiochemical properties of some mineral elements such as Ca, Cu, P, K, C, S, N. however the mineral component that controlled the production of this ink was the Carbon content. The different ink samples were formulated in terms of odour, colour, hazardous reaction, pH, density and viscosity and compared with that of international standards. Results obtained showed a good match, indicating the reliability and the quality of the produced white board marker ink. The pH results for Ugba ink = 5.43, Rubber ink = 6.79, and Mango = 7.41. Empirical models were used to predict concentration with that of experimental values, a plot of concentration against time in terms of production yield revealed that the order of magnitude was rubber>Ugba>Mango whereas in terms of penetration and writing ability Ugba>rubber>mango. Furthermore, the research demonstrates the significance of the characteristics of the charcoal and the used lube oil in the quality of the end product. Finally, the research revealed that ink produced from the oil bean (ugba) charcoal and lube oil was best in terms of write-ability and quality in the production of white board marker ink.

Crude oil spillage on land is a major undeniable challenge we face in the Niger Delta, this is as... more Crude oil spillage on land is a major undeniable challenge we face in the Niger Delta, this is as a result of the oil exploration and exploitation activity done by the big oil multinationals and also those done by indigenous private firms, the petroleum could find its way to the soil via occurrences including pipeline leakages and explosions, corrosion of underground pipes transporting crude oil and petroleum product and also it could come purely in form of untreated industrial waste. As a result of the foregoing research work was conducted using Moringa leave extract, and the component of interest included phosphates, potassium and nitrogen which are the major stimulators of bioremediation, were found to be abundant in the Moringa Oleifera leave extract. The application of Moringa leave extract was found to be useful in the enhancing of crude oil polluted lands, and by so doing it facilitates the rehabilitation of the contaminated soil as well as reinstating the soil constituents f...

The application of mathematical tools and techniques were applied in the process of monitoring an... more The application of mathematical tools and techniques were applied in the process of monitoring and predicting the corrosion rate and weight loss of stainless steel in salt and fresh water environment of Niger Delta region in Nigeria. The functional parameters used in the mathematical demonstration to compute the corrosion rate and weight loss were obtained from the experimental data and these functional coefficients were fitted into the power and quadratic model. The experimental corrosion rate and weight loss value was compared with the theoretical computed value for both model of quadratic and power concept approach and the result obtained demonstrate a good match indicating the reliability of the concepts on monitoring and predicting the process. In this case, the corrosion rate and weight loss was experienced to be more rapid in the salt water environment than the fresh water environment; this can be attributed to the characteristics of the salt water concentration of the physic...

This paper investigates the model to predict the characteristics of dipole atoms upon the applica... more This paper investigates the model to predict the characteristics of dipole atoms upon the application of Schrödinger’s wave equation. Many element of chemists’ picture of molecular structure hinge on the point of view that separates the electronic motions from the vibration/rotational motion and treats coupling between these separated motions as perturbations. It is essential to understand the origins and limitations of this separated (dipole) motion picture. To develop a framework in terms of which to understand when such separable is valid, one think of an atom or molecule as consisting of a collection of N electrons and M nuclei each of which possesses kinetic energy and among which columbic potential energies of interaction arise to properly describe the motion of all these particles, one need to consider the full Schrödinger Equation Hφ = ∈φ in which the Hamiltonian H contains the sum of the Kinetic energies of all N electron and the M nuclei. The range of accuracy of this sepa...

This work is aimed at developing a mathematical model equation that can be used to predict the fa... more This work is aimed at developing a mathematical model equation that can be used to predict the fate of contaminant in the soil environment. The mathematical model was developed based on the fundamental laws of conservation and the equation of continuity given asand was resolved to obtain a quadratic equation of the form C(X) = DX2+vX+f. The developed equation was then used to fit the experimental data that were obtained from the Physio-chemical analysis of the soil samples which were obtained at various depths; within the vicinity of the H & H Asphalt plant Company, located at Enito 3 in Ahoada West L.G.A, River State, Nigeria. The Experimental and Model results obtained from the Calculation and Simulation of the developed models were compared numerically and graphically as presented in this work. It was observed that there is reasonable level of agreement between the three results. The polynomial of the curve was established to ascertain the validity of the model; this was done for...

In this research work Haber process was employed to examine the reliability of the functional par... more In this research work Haber process was employed to examine the reliability of the functional parameters and coefficient on ammonia production using the fixed bed reactor with hydrogen gas and nitrogen used as the main source of the reactant. Mathematical models were developed to monitor and predict the effectiveness factors, nitrogen fractional conversion, temperature, component mole fraction, hydrogen mole fraction, and ammonia mole fraction profile for the various cases considered during the investigation. The simulated parameters for case 1, 2 and 3 for components of total feed flow, pressure, reactor bed volume and feed composition influence the reliability of the functional parameters and the coefficient of the fixed bed reactor for optimum yield of ammonia. The developed models were simulated using Matlab program to evaluate the functional parameters and the results obtained from the system in terms of optimum yield factor indicate 30% to 34% increase in ammonia production. T...

Zenodo (CERN European Organization for Nuclear Research), Apr 1, 2023

This study was carried out to evaluate the potential of fermented Guava Leaf (Psidium guajava) fl... more This study was carried out to evaluate the potential of fermented Guava Leaf (Psidium guajava) fluid extract in bioremediation of crude oil polluted soil. For this purpose, 6reactors were set up and labelled R1 to R6, with R6 as the control. 2kg of soil sample was polluted with 150ml of crude oil and the remediant was added to each reactor. The volume of remediant were varied at increasing order of 20ml to 100ml from R1 to R5. R6 contains no remediant. Samples were taken and analyzed at 4days interval for total petroleum hydrocarbon (TPH) and nutrient content. The study lasted for 20days. At the end of the study period, there was 75.65% and 91.95% decrease in the concentration of TPH in R1 and R5, with the lowest and the highest respectively, compared to 18.44% decrease in R6. Similarly, there was a gradual decrease in the concentrations of total organic carbon, nitrogen, phosphorus, and potassium in all samples. The transient growth of the bacteria and fungi was monitored with respect to the degradation rate of the substrate in each batch bioreactor and the result obtained demonstrates the following phases, lag, progressive or exponential, stationery and death or decline. This reveals the theory of Monod's model indicating decline in a viable nutrient and substrate utilization in each bioreactor. This research has demonstrated that psidium guajava possess the characteristics of good biostimulant enhancing bioremediation of polluted soil environment.

African Journal of Bacteriology Research, Mar 31, 2011

In this paper, mathematical models were developed to simulate the inhibition effect of some physi... more In this paper, mathematical models were developed to simulate the inhibition effect of some physicochemical parameters on the biodegradation rate of aromatic compounds in the presence of low and high concentration of salinity. The inhibitive effects of salinity, in this case, were investigated. The aromatic compounds were obtained from an oil-servicing firm in Port Harcourt, and the microbial analysis was conducted on the water samples for the purpose of identification, isolation and characterization of the Pseudomonas putida. A head-to head comparison of the degradation rates of toluene, phenol and benzene in fresh medium was done based on the data obtained from experiments conducted. The result showed that salinity did not inhibit the degradation rate of toluene and benzene. However, phenol was significantly affected by salinity. The aromatic compounds removal from water solution varied depending on the conditions, that is, the type of compound, the composition of the water solution and the conditions of their exposure. The results obtained from this investigation was compared with Suietlik et al. (2002) work which revealed 22 to 28% reduction in aromatic compounds degradation while the present research shows 45-75% reduction in aromatic compounds under investigation for a period of 2 weeks (21 days) exposure. The parameters form the bedrock for further improvement of the kinetic models and also, serve as an outline for possible pilot-scale bioremediation by engineers.

A regression analysis model was developed to examine the reliability and the acceptability of the... more A regression analysis model was developed to examine the reliability and the acceptability of the sun-dried and room-dried <em>Azadirachta indica</em> leaves for the remediation crude oil contaminated soil in Niger Deltal, Nigeria. An experimental approach was used to monitor the concentration of the total petroleum hydrocarbon (TPH) degradation that was enhanced in the presence of the microbes in the reactor. A regression analysis was performed to evaluate the reaction behavior microbes in reactor for the remediation of the TPH in the presence of sun-dried and room-dried <em>A. indica</em> leaves in sandy and loamy soils contaminated with 100 ml of crude oil. The physicochemical properties of control loamy soil was as; pH (6.75), electric conductivity (10.36 µS/cm), total oxygen (2.99%), total Nitrogen (0.091%), potassium (36.82942%), phosphorus (15.36%) and total bacteria (2.15×10²cfu/g). Whereas, these values were as pH (6.82), elec...

The control of corrosion of metal and its alloy dissolution in environments that induce corrosion... more The control of corrosion of metal and its alloy dissolution in environments that induce corrosion has been reviewed showing successes recorded in the search for alternative inhibitors that would replace toxic and expensive inhibitors that in some instances require rigorous process of synthesis. Studies show that organic compounds, drugs, polymers and extracts from plant have been used. It also shows that in an effort to improve the efficiency of the developed inhibitors quite a number of them have been synergized with halide ions and surfactants. The mode of adsorption mechanism for majority of the tested inhibitor alternatives is also highlighted.

The basic particle electron obeys various theories like electrodynamics, quantum mechanics and sp... more The basic particle electron obeys various theories like electrodynamics, quantum mechanics and special relativity. Particle under different experimental conditions behaves differently, allowing us to observe different characteristics which are the basis for this work. In this paper, we have made an attempt to predict the energy quantum of an electron in an orbit using hydrogen, lithium and sodium atom as a base. It is difficult to find structure of electron experimentally, a mathematical attempt to predict the energy quantum number of an orbit when not in motion, was developed to study the atom with same number of orbits, different atomic numbers and observed that an increase in orbits has a major effect on the energy level. An attempt has been made to give a model that predicts the energy quantum of an electron in an orbit, the focus of these work is to develop a mathematical model that can predict energy quantum of electron in an orbit.

The biodegradability of Total Petroleum Hydrocarbon (TPH) in loamy soil amended using neem root e... more The biodegradability of Total Petroleum Hydrocarbon (TPH) in loamy soil amended using neem root extracts was investigated in this study. The neem roots were soaked separately into predetermined volume of water to extract liquids from the roots. The solution of neem-water and extract was then used as treatment to remediate crude oil polluted loamy soil. The loamy soil was used for this study. The physicochemical properties of the loamy soil before pollution, after pollution and at the 84^th day of treatment were determined, while analysis for the total bacteria count and TPH were carried out for 84^th days at 14 days interval. Density, electrical conductivity (EC), moisture content (MC), total organic carbon (TOC), total nitrogen (TN) and phosphorus (P) in the soils increased after pollution, except for pH, which was the opposite. However, density, EC, MC, TOC, TN and P decreased remarkably with time under treatment, while pH increased from...

European Journal of Engineering and Technology Research, 2018

This research outlines the microbial and substrate interaction in a plug flow bioreactor system f... more This research outlines the microbial and substrate interaction in a plug flow bioreactor system for effective utilization of the substrate by the microorganism. To achieve this mathematical models were developed to monitor, predict and simulate the interaction characteristics of the bioreactor using the functional parameters for interaction of microbial and substrate concentration in a plug flow reactor system. The MATLAB computer program language was used to determine the interaction relationship between the substrate and microbial concentration upon the influence of bioreactor volume, space time and discharge time. The characteristics of the behavior in terms of decrease in substrate concentration with increase in microbial concentrate revealed the interaction in the bioreactor with recycle.

The effectiveness of pH and microbial activities on the sun-dried and room-dried Azadirachta Indi... more The effectiveness of pH and microbial activities on the sun-dried and room-dried Azadirachta Indica leaf was monitored to examine the significance of their roles in crude oil degradation in different soil environments.The examination was conducted by varying quantities, in the remediation of sandy and loamy soils contaminated with 100ml of crude oil. Gas Chromatography-Mass Spectrometry method was used to test for the physicochemical properties of the materials used for the experiment. The unpolluted loamy soil was observed to contain pH of 6.75, electric conductivity of 10.36µS/cm, Total Oxygen content of 2.99%, Total Nitrogen of 0.091%, potassium content of 36.82942%, phosphorus content of 15.36% and Total Bacteria count of 2.15×10 2 cfu/g. Likewise, The unpolluted sandy soil was observed to contain pH of 6.82, electric conductivity of 21.48µS/cm, Total Oxygen content of 1.18%, Total Nitrogen of 0.036%, potassium content of 24.03681%, phosphorus content of 5.18% and Total Bacteria...

The model equation for the sorption of urease in a fluidized bed reactor was developed taking int... more The model equation for the sorption of urease in a fluidized bed reactor was developed taking into consideration gradient and temperature gradient across the bed height. The ordinary differential equation obtained was simulated using MATLAB (7.9.0 4D) and it was observed that concentration gradient changes across the bed. Urease Test determine the ability of microorganisms to degrade urea by means of the enzyme urease. The equation for the modelling of the Biokinetics of urease sorption using fluidized bed reactor was used to study the effects of both the concentration and temperature of the urease in the bed of reactor height. The obtained differential equation was simulated using MATLAB (7.9.0 4D) and it was observed that the concentration of urease and temperature changes across the bed. Finally, the results obtained reveals the usefulness of MATLAB – 7.9.0 4D computer programme language for monitor, predicting and simulation of biokinetics model for urease sorption in a fluidize...

This study is an investigation into the degree of salinity of rivers in Bayelsa State. The rivers... more This study is an investigation into the degree of salinity of rivers in Bayelsa State. The rivers chosen were Brass, Nembe, Sangana and Ukubie all in Bayelsa State. Rivers samples were collected and their Salinity levels determined using the total dissolved solids methods in which the water samples were evaporated to dryness and the residual salt weighed. Their results in g/l was converted to parts per million (ppm). The result of the analysis showed that Brass river water at 22,000 ppm, Sangana River had a salinity level of 13,700 ppm, Ukubie Creek River had a salinity level of 20,000 ppm and Nembe River 13,000 ppm. The density of the various water samples obtained are given as 1.25g/cm3, 1.28g/cm3, 1.41g/cm3 and 1.45g/cm3 for Nember, Sangana, Ukubie and Brass river water as well as the pH values are within the range of 7.21 to 7.51. The research demonstrates the usefulness of these rivers in the production of local salt within the Niger Delta of Nigeria.

Computer programme language of MATLAB software was used to monitor, predict and simulated the cha... more Computer programme language of MATLAB software was used to monitor, predict and simulated the characteristics of step input response on pneumatic proportional derivative controller with the concept of transfer functions. The prediction of step input response on pneumatic proportional derivative controller was examined using the concept of transfer function. A model equation was also developed to give account of the response of on pneumatic proportional derivative controller. The equation was developed to monitor the influence of restrictor on proportional derivative controller using the concept of transfer function. The effect of restrictor on the controller was monitored and predicted using the concept of Laplace transform and MATLAB 2007. Increase in the derivative pressure was observed with increase in response time. Key word: Prediction, step input response, pneumatic, proportional derivative controller, transfer functions.

Bag Filters play important role in the economy of modern industries that it is use for not only t... more Bag Filters play important role in the economy of modern industries that it is use for not only to control air pollution but to prevent waster and recycle materials back into the process. Because of the importance of Bag houses in industries, considerable effort has been done by scientists till now on the modeling of this unit for better understanding and improved productivity. To model and design a bag house we have to know the unknown kinetic parameters of the governing equations. The basic aim of this research is to state and compile the basic design equations for various units in the bag house and to prove that MATLAB and HYSYS can be used as a tool for the estimation of kinetic parameters of governing equations for a bag house and to check for its efficiency. The research work demonstrates the usefulness of this design in monitoring, predicting and simulating the significance of bag filter in controlling particles displacement into the air. Key words : Investigation, design, co...

Model for predicting the distribution parameter concentration of alkalinity and total hardness in... more Model for predicting the distribution parameter concentration of alkalinity and total hardness in stagnant water environment upon the influence of oil and gasemission was investigated in this paper. The model was formulated from the basic principle of mass and momentum concept which was resolved to obtain an ordinary differential equation. A mathematical tool known as the least square method was applied to resolve the differential equation to obtain quadratic equation based on thedistribution parameter concentration of alkalinity and total hardness in stagnant Water environment. Experimental data obtained from the analysis were fitted into the model to obtain their diffusivities and velocities of the parameters upon the influence of contaminants. Concentrations of the contaminants at the various depths were simulated and the polynomial of the curve was also established to ascertain the validity of the developed model. Simulated results from the model were compared analytically and g...

European Journal of Engineering Research and Science, Mar 19, 2019

This research work was conducted to demonstrate the mechanism of white board marker ink productio... more This research work was conducted to demonstrate the mechanism of white board marker ink production using locally sourced raw materials such as charcoal and used lube oil. In the production of the ink, the charcoal served as a pigment, used lube oil served as the primary binder or resin, ethanol served as solvent and gum Arabic served as an additive. The charcoal was obtained from processing of Mango, Oil bean (Ugba) and rubber trees, which were further crushed to their finest particles respectively and the used lube oil was obtained from mechanical engineering servicing unit of automobile engines. The crushed charcoal samples were characterized to determine the physiochemical properties of some mineral elements such as Ca, Cu, P, K, C, S, N. however the mineral component that controlled the production of this ink was the Carbon content. The different ink samples were formulated in terms of odour, colour, hazardous reaction, pH, density and viscosity and compared with that of international standards. Results obtained showed a good match, indicating the reliability and the quality of the produced white board marker ink. The pH results for Ugba ink = 5.43, Rubber ink = 6.79, and Mango = 7.41. Empirical models were used to predict concentration with that of experimental values, a plot of concentration against time in terms of production yield revealed that the order of magnitude was rubber>Ugba>Mango whereas in terms of penetration and writing ability Ugba>rubber>mango. Furthermore, the research demonstrates the significance of the characteristics of the charcoal and the used lube oil in the quality of the end product. Finally, the research revealed that ink produced from the oil bean (ugba) charcoal and lube oil was best in terms of write-ability and quality in the production of white board marker ink.

Crude oil spillage on land is a major undeniable challenge we face in the Niger Delta, this is as... more Crude oil spillage on land is a major undeniable challenge we face in the Niger Delta, this is as a result of the oil exploration and exploitation activity done by the big oil multinationals and also those done by indigenous private firms, the petroleum could find its way to the soil via occurrences including pipeline leakages and explosions, corrosion of underground pipes transporting crude oil and petroleum product and also it could come purely in form of untreated industrial waste. As a result of the foregoing research work was conducted using Moringa leave extract, and the component of interest included phosphates, potassium and nitrogen which are the major stimulators of bioremediation, were found to be abundant in the Moringa Oleifera leave extract. The application of Moringa leave extract was found to be useful in the enhancing of crude oil polluted lands, and by so doing it facilitates the rehabilitation of the contaminated soil as well as reinstating the soil constituents f...

The application of mathematical tools and techniques were applied in the process of monitoring an... more The application of mathematical tools and techniques were applied in the process of monitoring and predicting the corrosion rate and weight loss of stainless steel in salt and fresh water environment of Niger Delta region in Nigeria. The functional parameters used in the mathematical demonstration to compute the corrosion rate and weight loss were obtained from the experimental data and these functional coefficients were fitted into the power and quadratic model. The experimental corrosion rate and weight loss value was compared with the theoretical computed value for both model of quadratic and power concept approach and the result obtained demonstrate a good match indicating the reliability of the concepts on monitoring and predicting the process. In this case, the corrosion rate and weight loss was experienced to be more rapid in the salt water environment than the fresh water environment; this can be attributed to the characteristics of the salt water concentration of the physic...

This paper investigates the model to predict the characteristics of dipole atoms upon the applica... more This paper investigates the model to predict the characteristics of dipole atoms upon the application of Schrödinger’s wave equation. Many element of chemists’ picture of molecular structure hinge on the point of view that separates the electronic motions from the vibration/rotational motion and treats coupling between these separated motions as perturbations. It is essential to understand the origins and limitations of this separated (dipole) motion picture. To develop a framework in terms of which to understand when such separable is valid, one think of an atom or molecule as consisting of a collection of N electrons and M nuclei each of which possesses kinetic energy and among which columbic potential energies of interaction arise to properly describe the motion of all these particles, one need to consider the full Schrödinger Equation Hφ = ∈φ in which the Hamiltonian H contains the sum of the Kinetic energies of all N electron and the M nuclei. The range of accuracy of this sepa...

This work is aimed at developing a mathematical model equation that can be used to predict the fa... more This work is aimed at developing a mathematical model equation that can be used to predict the fate of contaminant in the soil environment. The mathematical model was developed based on the fundamental laws of conservation and the equation of continuity given asand was resolved to obtain a quadratic equation of the form C(X) = DX2+vX+f. The developed equation was then used to fit the experimental data that were obtained from the Physio-chemical analysis of the soil samples which were obtained at various depths; within the vicinity of the H & H Asphalt plant Company, located at Enito 3 in Ahoada West L.G.A, River State, Nigeria. The Experimental and Model results obtained from the Calculation and Simulation of the developed models were compared numerically and graphically as presented in this work. It was observed that there is reasonable level of agreement between the three results. The polynomial of the curve was established to ascertain the validity of the model; this was done for...

In this research work Haber process was employed to examine the reliability of the functional par... more In this research work Haber process was employed to examine the reliability of the functional parameters and coefficient on ammonia production using the fixed bed reactor with hydrogen gas and nitrogen used as the main source of the reactant. Mathematical models were developed to monitor and predict the effectiveness factors, nitrogen fractional conversion, temperature, component mole fraction, hydrogen mole fraction, and ammonia mole fraction profile for the various cases considered during the investigation. The simulated parameters for case 1, 2 and 3 for components of total feed flow, pressure, reactor bed volume and feed composition influence the reliability of the functional parameters and the coefficient of the fixed bed reactor for optimum yield of ammonia. The developed models were simulated using Matlab program to evaluate the functional parameters and the results obtained from the system in terms of optimum yield factor indicate 30% to 34% increase in ammonia production. T...