Browsing Materials, Energy, Water and Environmental Sciences by Issue Date
Now showing items 41-60 of 582
-
Defluoridation of Water Supplies Using Coconut Shells Activated Carbon: Batch Studies
(IJSR, 2014)Drinking water with elevated fluoride levels results in serious irreparable health problem that has attained an alarming dimension all over the world, Tanzania being one of the affected countries; techniques have been ... -
Effects of Rhizobium inoculation and Supplementation with P and K, on Growth, Leaf chlorophyll content and Nitrogen Fixation of Bush bean varieties
(American Journal of Research Communication, 2014)Low crop productivity is a general problem facing most farming systems in sub-Saharan Africa (SSA). These low yields are pronounced in grain legumes and are often associated with declining soil fertility and reduced ... -
Preparation of activated carbon with disered properties through optimization of impregnating agent
(Rjeas, 2014)In this study, activated carbon with desired properties was prepared from peanut shell and sugarcane bagasse using chemical activation method in which potassium hydroxide (KOH) was used as a impregnating agent. The ... -
Potentials of agric wastes activated carbons for water softening
(Research Journal in Engineering and Applied Sciences, 2014)Various studies have been conducted to address softening of hard water. Ion exchange, electro-based techniques, membrane filtration and adsorption are the most reported techniques in softening hard water. In the present work, ... -
Effect of Glass Thickness on Performance of Flat Plate Solar Collectors for Fruits Drying
(Hindawi Publishing Corporation, 2014)This study aimed at investigating the effect of thickness of glazing material on the performance of flat plate solar collectors. Performance of solar collector is affected by glaze transmittance, absorptance, and reflectance ... -
Plant biomasses for defluoridation appropriateness : unlocking their potentials
(Research Journal in Engineering and Applied Sciences, 2014)Fluoride and fluorosis are endemic to many countries including Tanzania. Performances of different materials for use in water defluoridation systems have been reported. Some of these materials are; alum, oxides and hydroxide ... -
Energy Recovery routes from Municipal Solid Waste : A case study of Arusha-Tanzania
(Journal of Energy Technologies and Policy, 2014)A study of energy recovery from municipal solid waste was undertaken. The energy content of the solid waste is 12MJ/kg. The elemental composition shows that the municipal solid waste contains 50% and 5% of carbon and hydrogen ... -
Building Bridges between the Sciences and the Arts of Water Co-operation through Collective Action – Reflections
(Elsevier, 2014)This reflection article highlights some of the science that underpins our understanding of cooperation over shared water resources. Power dynamics, hegemony, negotiation theory, social psychology and justice, international ... -
Mungongo Seeds Oil (Schinziophyton rautanenii) as a Potential Source of Bio-Diesel
(Scientific.Net, 2014-01)Biodiesel from mungongo seeds oil (Schinziophyton rautanenii) was investigated in the present study to determine its suitability for use as substitute of petro diesel. The fuel properties of Mungongo Oil Methyl ester (MOME) ... -
Wastewater treatment for reuse in urban agriculture; the case of Moshi Municipality, Tanzania
(Pergamon, 2014-01-01)Urban agriculture is practiced by dwellers as an adaptive response to improve their food security, household income, create informal employment and diversify their livelihood through sales of surplus produce or savings. ... -
Energy minimization in monoethanolamine‐based CO2 capture using capacitive deionization
(John Wiley & Sons, Ltd., 2014-01-07)Post‐combustion CO2 capture using monoethanolamine (MEA) is a mature technology; however, the high energy input requirements for solvent regeneration are still a challenge for MEA‐based CO2 capture. In this paper, a novel ... -
Production of graded porous polyamide structures and polyamide-epoxy composites via selective laser sintering
(SAGE Publications, 2014-02-07)Selective laser sintering was used for producing uniformly porous and graded porous polyamide structures. The porous structures were infiltrated with epoxy to produce composites. The porous and composite specimens were ... -
Agrochemicals use in horticulture industry in Tanzania and their potential impact to water resources
(International Journal of Biological and Chemical Sciences, 2014-04)The objective of this review was to analyze the existing information on the use of agrochemicals (Fertilizers and Pesticides) in the Tanzanian horticulture industry especially the Northern regions and their potential to ... -
Computational dynamics of solid waste generation and treatment in the presence of population growth
(Asian Journal of Mathematics and Applications, 2014-05-08)Solid waste management is a global challenge and the situation is worse in urban areas of the developing countries where, in most cases, there are no data of how much solid waste is generated over a specific period of ... -
A review on opportunities for the development of heat pump drying systems in South Africa
(South African Journal of Science, 2014-05-28)Recently, it has been discovered that heat pump drying is an efficient method of drying for drying industries. Heat pumps deliver more heat during the drying process than the work input to the compressor. Heat pump drying ... -
Potential of municipal solid waste, as renewable energy source : a case study of Arusha, Tanzania.
(International Journal of Renewable Energy Technology Research, 2014-06)This paper presents the study of municipal solid waste (MSW) as a potential source of renewable energy in Arusha city. The city of Arusha annual average MSW generated was estimated at 43,772 tonnes. Characterization ... -
Analysis of Different Techniques for Improving Performance of Flat Plate Solar Collectors for Fruits Drying
(Tanzania Journal of Engineering and Technology (TJET), 2014-06)Fruits drying had become a broader technology in fruits and vegetables value addition. The technology is reported to be a promising way of dying without incurring higher cost but its adaptation has not been feasible in ... -
Hybrid Reverse Osmosis‐Capacitive Deionization versus Two‐Stage Reverse Osmosis: A Comparative Analysis
(John Wiley & Sons, Inc., 2014-06-06)Reverse osmosis (RO) is a high‐pressure single‐phase desalination process used to obtain freshwater from seawater/brackish water. The RO system shows high energy consumption for a given unit volume of pure water produced. ... -
Energy Recovery from Municipal Solid Waste
(Regional Collaboration Conference, 2014-07)Energy flow analysis and thermal degradation of municipal solid waste was carried out using differential scanning calorimetry and thermo-gravimetric analyzer at heating rates of 10 K/min, 20 K/min, 30 K/min and 40 K/min ... -
Environmental Contamination By Radionuclides And Heavy Metals Through The Application Of Phosphate RocksDuring Farming And Mathematical Modeling Of Their Impacts To The Ecosystem
(nternational Journal of Engineering Research and General Science, 2014-07)Most of rock phosphates contain radioactive elements and heavy metals because theyoriginate from phosphate deposits. The application of these rock phosphates may result to the transfer of these dangerous materials into ...