December 2010
Extraction of Al and Na from red mud by magnesium oxide sodium carbonate sinter process
The sintering of Bayer’s process waste residue: Red mud along with magnesium oxide and sodium carbonate is adopted for recovery of aluminium and sodium followed by leaching. This is facilitated by the high temperature reaction of magnesium oxide sodium carbonate and DSP in the red mud to produce an insoluble dimagnesium silicate, magnesium ferrite, magnesium titanate and a soluble...
December 2010
Climate impacts, forest-dependent rural livelihoods and adaptation strategies in Africa: A review
The long term contribution of forests to the livelihoods of the rural poor had been long appreciated. More than half of Africa’s fast-growing population rely directly and indirectly on forests for their livelihoods. As the continent faces stresses from poverty and economic development, another major uncertainty is looming that could alter many of the relationships between people and forests. This...
December 2010
Second law analysis of a solar air heater having 60° inclined discrete rib roughness on absorber plate
Artificially roughened solar air heaters perform better than the smooth ones under the same operating conditions. However, artificial roughness leads to even more fluid pressure thereby increasing the pumping power. The entropy generation in the duct of solar air heater having 60° inclined discrete rib roughness on one broad wall is studied numerically. The effect of system parameters such as relative...
December 2010
Electro kinetic remediation of contaminated habitats
Electrokinetics (EK) is a process that separates and extracts heavy metals, radionuclides and organic contaminants from saturated or unsaturated soils, sludge, and sediments. A low intensity direct current is applied across electrode pairs that have been implanted in the ground on each side of the contaminated soil mass. The electrical current causes electroosmosis and ion migration (electromigration)...
December 2010
Pasteurization of mushroom substrate and other solids
Mushrooms represent an important part of natural solid waste disposal, which can be enhanced by cultivation. Cultivation provides a source of wholesome food which thus, by cultivating them we can have more food and less solid waste. However, pasteurization for cultivation requires the use of some fuel. In order to obtain the maximum environmental benefit from them, it is therefore important to use the minimum...
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