Abstract: Tuber crops are widely consumed; they come in various varieties with great nutritional and non- nutritional values. They are very rich in starch. The starch content of each of the six varieties of Nigerian tubers was determined, each of the tubers was wet fractionated in the laboratory and the starch was recovered. The composition of the tubers (dry matter, protein, ash and mineral content) and starch isolation (moisture, starch, protein, phosphorus, fat and carbohydrate) were determined. Substantial differences in the starch content of the tubers were observed. The dry starch recovery ranged from 10.20% to 18.30% and the wet starch recovery ranged from 15.70-32.40%. Moisture content ranged from 13-15.80%, viscosity 275.08 -382.33. The carbohydrate, ash, fat and protein content of the six varieties of the tubers vary from 45% to 53.8%, 1.0 to 2.0%, 19.56 to 21.99% and 10.96-14.29% respectively. All six starches were insoluble in water and ethanol and proved positive to iodine and Fehling’s test. Extracted starch was dextrinated using 0.1M and 0.2M HCl separately at 160 and 100°C to obtain yellow dextrin and white dextrin respectively which were soluble in water. Modified starches were formulated into adhesives. Results obtained indicated satisfactory strength for the adhesives. Thus starches suitable for the production of adhesives were obtained.Abstract: Tuber crops are widely consumed; they come in various varieties with great nutritional and non- nutritional values. They are very rich in starch. The starch content of each of the six varieties of Nigerian tubers was determined, each of the tubers was wet fractionated in the laboratory and the starch was recovered. The composition of the tubers (dr...Show More
Abstract: Thermo-chemical conversion technologies (incineration, gasification and pyrolysis) have emerged as potential technologies for municipal solid waste management (MSWM). This is happening due to the increase of the need for clean and sustainable energy as a result of fossil fuel depletion. The increase in municipal solid waste (MSW) generation as well as land scarcity for MSW disposal is another reason in raising the potential for thermal technology. Incineration has been the most common thermo-chemical technology for solid waste disposal. However, due to environmental concern, gasification technology is currently becoming more preferable since it is environmental friendly for MSW disposal as well as energy recovery. The aim of this study is to analyze the flue gases obtained from the hybrid fixed bed gasifier during gasification of MSW. The fire was initiated by wood charcoal and six kilograms of MSW was fed in the gasifier. The combustion was supported by the air supplied by electric blower. The flue gas analyzer, TESTO 327-1 was used to analyze the concentration of CO, CO2 and O2. Results show that after 150 minutes of the gasification process, O2 concentration increased by 17.2% while CO and CO2 decreased by 0.0% and 3.77% respectively. The experimental results show that, during gasification process the O2 concentration was increasing with time while CO and CO2 concentration decreased.Abstract: Thermo-chemical conversion technologies (incineration, gasification and pyrolysis) have emerged as potential technologies for municipal solid waste management (MSWM). This is happening due to the increase of the need for clean and sustainable energy as a result of fossil fuel depletion. The increase in municipal solid waste (MSW) generation as well...Show More
