B. R. Etuk

University of Uyo | UNIUYO · Department of Chemical Engineering

ABSTRACT Haphazard disposal of industrial effluents into the environment has negatively impacted the global water security sector. Some of the accompanying chemical pollutants are reported to be carcinogenic when ingested or inhaled. Cadmium had been linked with several cancers in humans. Batch-wise adsorption technique is the commonly practiced se...

Cyanide, a toxic compound found in cassava wastewater which on frequent basis is discharged to the environment poses danger to the ecosystem; this research work aims to curb this menace. Temperature, pH, dosage, contact time, adsorbent mixture ratio and initial concentration were optimized using CCD on periwinkle-oyster shells composite mixtures fo...

Haphazard disposal of industrial effluents into the environment has negatively impacted the global water security sector. Some of the accompanying chemical pollutants are reported to be carcinogenic when ingested or inhaled. Cadmium had been linked with several cancers in humans. Batch-wise adsorption technique is the commonly practiced separation...

The continuous generation of waste resulting from the industrial activities of humans has significantly been on the rise, especially liquid wastes emanating from cassava processing mills, which is a major cause for concern in developing countries. This study focused on the preparation of H3PO4 activated periwinkle carbon (APSC) and use in the remov...

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...

Crude oil emulsion is an inevitable phenomenon in hydrocarbon production. Treatment of crude oil emulsion is challenging when the emulsion is stabilized. As crude oil is brought to the surface and pumped to the production facilities, the formation of emulsion increases operating costs. There is a wide array of demulsifiers that are available in the...

The elimination of residual free water and Basic Sediments (BS&W) after field demulsification process and characterization is being investigated with a diluent, to enhance field treatment for quality assurance and crude oil custody transfer. The American Standard for Testing Materials (ASTM) D 4007 is used as separation technique for three field em...

Local cassava processing industries produce large quantities of wastewater containing cyanide which is toxic in nature with negative impacts on the environment when disposed without treatment. In this study calcined periwinkle shell (CPS) was prepared, characterized and used to adsorb cyanide present in cassava wastewater. Equilibrium studies were...

Calcined ash and activated ash adsorbents were prepared from oyster shell. The physico-chemical properties of the prepared calcined oyster shell ash (COSA) and activated oyster shell ash (AOSA) were obtained using ASTM standards and Sears method. The results show that AOSA is a better adsorbent for removal of cyanide from cassava wastewater than CO...

Based on the current level of ecological awareness, it is difficult to ignore hazardous emissions from any industrial process or human activities because of its adverse impacts on the environment. The substitution of input materials with less-or non-toxic, eco-friendly or renewable raw materials, where possible, has been the concern of various rese...

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 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...

The objective of this work was the simulation of methanol production process using a modified kinetic model to study the effect of reaction conditions on the relative contribution of Carbon II and Carbon IV oxides in methanol synthesis. The results showed that Carbon II oxide hydrogenation decreased as percentage of Carbon IV oxide increased and vi...

This research work focused on the optimization of the cassava wastewater medium for ethanol fermentation. The main thrust was the investigation of the influence of the glucose concentration, nutrient (NH4CI) level, and cell concentration on the yield of ethanol from cassava wastewater. Twenty experiments based on rotatable central composite design...

The Gas-to-Liquid (GTL) technology presents a well proven route for utilising stranded natural gas and securing the world energy future. In this process natural gas is converted to liquid transport fuels (naphtha and diesel) in three major stages: Methane reforming (Syngas production), synthesis of GTL liquids from the Syngas (Fischer Tropsch proce...

Separation of ultrafine goethite from Kaolinite by selective dispersion and flocculation was effective using causticized cassava starch. The influence of pH of slurry and polymer concentration on the flocculability of goethite and kaolinite were investigated. Flocculation of goethite is more favourable with 50ppm causticized starch in the pH range...

The effect of particle size distribution of sorghum malt grist on gelatinization temperature of the sorghum mash was assessed with respect to sorghum variety ICSV400. This was with a view to determining the possible relationship between the grist size distribution and the temperature at which the mash from such grist will gelatinize. Sorghum grist...

The effect of particle size distribution of malted sorghum grist on extract yield and lautering performance was assessed. Sorghum grist particle size evaluation was carried out by sieve analysis after milling. The malted sorghum grist with proportions of coarse, fine, and flour particles in the ratio of 0.36: 0.25: 0.39 respectively gave good resul...