Uwem Inyang

University of Uyo | UNIUYO · Chemical and Petroleum Engineering

rying of food products is a significant process in food processing and agricultural industry. In the study, hot leaves (Piper guineense) were dried at varying temperatures (40-70 °C) and times (170-340 minutes) using an experimental design approach. The drying moisture content was optimized using response surface methodology (RSM) and artificial ne...

Composite material using coconut fiber to produce reinforced low-density polyethylene (LDPE) composite was produced for evaluating of the effect of varying fiber sizes on the mechanical (tensile, hardness, and impact strength), water absorption, and chemical resistance properties of the developed LPDE. Sample categories were prepared by varying the...

Poly (vinyl chloride), PVC has extensive applications due to the incorporation of plasticizers on it. Plasticizers are known to make PVC polymers flexible, malleable, and easy to process. The paper addresses a general overview of plasticizers which encompasses the definition, types, examples and sources of it. Petroleum based plasticizers are known...

The aim was optimization of sweet potatoes (Ipomoea batatas) drying process conditions with RSM to obtain high quality product is very vital as improper drying conditions can affect the composition of the dried sweet potatoes and thereby increases the risk of running into deterioration of the nutrient contents of the product and loss. Matured sweet...

Agricultural wastes have increased in recent times due to an increased need for agricultural products by humans. These wastes causes environmental pollution and hazard to the society. Hence, the need to embark on anaerobic digestion to convert these waste to biogas. Biogas has been proven to be a good alternative to gases produced from fossil fuel...

The problem with water vapour in natural gas stream, threaten the process facilities if the dew point temperature is not properly managed. Hydrate formation is inevitable at temperatures below the dew point. It becomes very important to reduce the water content in the gas stream to below or within the acceptable limit of 6-7lb/MMSCFD. There are man...

This paper is a review of artificial neural network technique for the prediction of drying parameters of food materials. The meaning of ANN, the importance, areas that ANN could be applied, future prospects and summary of previous researchers work using ANN for the prediction of drying parameters were considered. These drying parameters are not lim...

In this work, an artificial neural network (ANN) model was used to predict the moisture ratio of atama (Heinsia crinita) dried under different drying temperatures of 40 0 C, 50 0 C, 60 0 C, and 70 0 C using a laboratory dry oven. The experimental data collected (140 data points in all) which was partitioned into three sets: training (70%), validati...

This paper reports on the characterization of effluent fluid from different sections of a brewing plant with respect to the constituents and their toxicity level for possible classification and reuse within the system. The results showed the effluent fluids had moderate Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) of 40.30 mg...

Optimization of plantain drying process parameters to obtained high quality product is very vital as improper drying conditions can affect the composition of the plantain flour and thereby increases the risk of running into deterioration of the nutrient contents of the product and loss. Matured unripe plantains were processed by washing,

Kinetic modeling of the drying of unripe plantain slices for normal and hot water blanched samples was determined experimentally as a function of drying temperature. The plantain slices were fully exposed to heat at 70 0C with the use of laboratory drying oven. Experimental values for moisture ratios, percentage moisture content as well as drying r...

Drying of agricultural and food products reduces their moisture content and this help to avoid microbiological action which could lead to deterioration. In this study, the convective hot air oven was used to dry sliced cocoyam pieces to enable uniform drying. Proximate and functional analyses were carried out before and after drying. Eight selected...

In science and engineering research, most observed (experimental) data are fit to mathematical model(s): linear or nonlinear. Mostly, the statistical error test-least square method is used to minimize the difference between the experimental and model-predicted data to achieve a good fit. In this study, some statistical error functions: average, abs...

In this work bentonite clay was characterized and investigated for the adsorption of chromium and nickel metal ions from aqueous solution. The clay calcined at 650 °C was characterized for physical, chemical and textural properties. Nickel sulphate hexahydrate (NiSO4.6H2O) and chromium tri oxide (Cr2O3) solutions were used as metal model compounds...

This paper presents a model developed using artificial neural network (ANN) to predict the drying parameters of cocoyam (Xanthosoma sagittifolium L.) slices dried using an oven. To obtain data for developing the model, 311 drying experiments were performed on cocoyam slices of thickness ranging from 2 mm to 8 mm subjected to varying temperatures ra...

Drying is removing a large portion of the water contained in a product in order to considerably reduce the reactions which leads to deterioration of the products. In less developed countries where industry is not very important there is a general feeling that drying is an easy operation and not too much input is needed and anybody can do it. Drying...

The removal of Congo Red (CR) and Methylene Blue (MB) in aqueous solution using copper (II) oxide nanoparticles as the adsorbent has been studied. Copper (II) Oxide nanoparticles were synthesized by simple aqueous precipitation method and the surface area and bulk density were determined. Batch adsorption kinetic studies were carried out with varie...

The need for this study arose from the awareness that most flow reactors are neither ideal plug flow nor continuous stirred tank reactors. This makes it difficult in accounting for actual conversion obtained from such reactors thus causing much concern to the industrialists especially Chemical Engineers. The extent of departure from ideality was un...

This study presents the comparison of ethanol produced from corn starch using Saccharomyces cerevisiae obtained from different sources. Saccharomyces cerevisiae (S) bought from the market place and Saccharomyces cerevisiae (B) obtained from a brewery in Nigeria were used separately and in combination (SB). The colony counts and biochemical characte...

This paper reports on the characterization of effluent fluid from different sections of a brewing plant with respect to the constituents and their toxicity level for possible classification and reuse within the system. The results showed the effluent fluids had moderate Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) of 40.30 mg/l a...

This paper presents the results of mathematical modeling of a Continuous Stirred Tank Reactor (CSTR) for a conversion of cellulose into glucose and ethanol via acid hydrolysis and catalysis. The development of the models was based on the kinetics of series condensation reactions. Using reported experimental data and with the aid of a simple FORTRAI...