Browsing Masters Theses and Dissertations [MEWES] by Subject "Research Subject Categories::NATURAL SCIENCES"
Now showing items 1-20 of 38
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Application of rice and corn husk biochar for removal of heavy metal ions from industrial wastewater
(NM-AIST, 2020-01)This study investigated the removal of heavy metal ions from industrial wastewater by using rice and corn husk biochar. The choice of the materials was influenced by their largest surface area, plentiful functional groups ... -
Assessing adoption and water productivity of the system of rice-intensification under farmer-led irrigation system in northern Tanzania
(NM-AIST, 2021-02)This study was conducted to evaluate farmers‟ appropriation of the system of rice intensification (SRI) in an informal irrigation scheme in northern Tanzania. Understanding the integration and performance of SRI in the ... -
Assessment of fluoride bioaccumulation in catfish grown in fluoride rich waters
(NM-AIST, 2021-08)Fluoride bioaccumulation in fish poses a significant impact to their growth performance, survival and consequently to the upper trophic levels. Few studies have reported the impact of high fluoride concentration and their ... -
Assessment of fluoride removal in a batch electro‒coagulation process
(NM-AIST, 2021-06)A presence of excessive amounts of fluoride than the prescribed standards has been reported in sources of domestic water supply around mount Meru slopes and other parts in Tanzania while efforts to remove the excessive ... -
Assessment of levels and distribution of progesterone in receiving waters and wastewaters in the vicinity of Arusha city,Tanzania
(NM-AIST, 2020-12)This study aimed at investigating the levels and distribution of progesterone in receiving waters and wastewaters in Arusha, a fast-growing urban area and third largest city in Tanzania. Also, intend to assess the ... -
Assessment of Mpanda groundwater contamination and the effectiveness of the baobab seeds-derived biochar for iron removal from groundwater
(NM-AIST, 2024-08)Groundwater in Mpanda District, Tanzania, faces excessive iron content, causing a reddish brown colouration due to oxidized iron species. The present study evaluated Mpanda groundwater contamination and the effectiveness ... -
Assessment of the impacts of groundwater pumpage on the future water supply sustainability in Zanzibar, Tanzania
(NM-AIST, 2020-12)In the present study, a 42-year record of rainfall and temperature from Airport and a 43-year rainfall record from Kizimbani meteorological station were analyzed to understand how these climatic variables are affecting ... -
A column design for groundwater hardness removal using cashew nut shells activated carbon with potential application in low-income communities
(NM-AIST, 2020-02)Water hardness has been associated with various human health problems. In many developing countries, groundwater is the main source of drinking water. Water hardness has a significant impact on groundwater quality, ... -
Cryptogamic packed biofilter as potential adsorbent for co2, h2s and nh3 impurities from biogas
(NM-AIST, 2020-07)The presence of elevated concentrations of carbon dioxide, hydrogen sulfide, ammonia and trace impurities in biogas affect its caloric value as well as causes corrosion and are extremely toxic. There are various methods ... -
Effect of industrial dust deposition on photovoltaic module performance: Experimental measurements in tropical region
(NM-AIST, 2020-02)Dust particles accumulation affects photovoltaic module transmittance of photovoltaic solar cell glazing, and thus leading to substantial reduction of conversion efficiency owing to lower irradiance reaching the surface. ... -
Efficacy of silver nanoparticles in capacitive deionization electrodes as antimicrobial agents
(NM-AIST, 2020-02)The availability of clean and safe water is still a big challenge in most parts of the world. Drinking water should be free of harmful microorganisms and should contain the required amount of minerals based on the set ... -
Enhancing the performance of a spray flash evaporation integrated with evacuated tube desalination system
(NM-AIST, 2021-02)Numerical analysis for heat exchanger for spray-assisted low-temperature desalination system is presented for an existing low-temperature desalination unit at Arusha Technical College (ATC). The current desalination unit ... -
Experimental investigation of the variation in the potential of selected natural rocks as thermal energy storage materials
(NM-AIST, 2023-08)Fossil fuels cause greenhouse gas emissions and are perceived to deplete, hence the use of renewable energy is considered crucial. These renewables include the use of solar thermal energy in concentrated solar power (CSP) ... -
Fish bladder-based activated porous carbon/co3o4/tio2 composite electrodes for supercapacitors
(NM-AIST, 2020-02)Supercapacitors as energy storage devices depend on electrode materials, electrolyte and conductive additives. In relation to the above, this master’s dissertation specifically provides a scientific understanding and ... -
Groundwater recharge estimation and quality on the southern slopes of mount Kilimanjaro, Tanzania
(NM-AIST, 2021-07)This study was undertaken to estimate groundwater recharge rates using three methods (water table fluctuation (WTF), chloride mass balance (CMB) and soil moisture balance (SMB), as well as assessing the impact use of the ... -
Impact of climate change on groundwater recharge in lake Manyara catchment
(2020-08)This study aimed to estimate the groundwater recharge of the Lake Manyara catchment (7920 km2) in two different time intervals, historical 1988-2018 and near-future 2021-2050 climatic condition. This study analyzed the ... -
Influence of duct configurations on the performance of solar-assisted heat pump dryer for drying tobacco leaves
(NM-AIST, 2023-08)nadequate storage facilities and preservation techniques lead to a decrease in the quality of agricultural products. Application of modern processing techniques has reduced post-harvest losses of agricultural crops. ... -
Inhibition of aluminium corrosion using carica papaya extracts in acidic media (sulphuric acid and phosphoric acid)
(NM-AIST, 2017-12)Corrosion inhibition of aluminium using Carica papaya leaves extracts in 1M H2SO4 and IM H3PO4 was investigated under different temperatures (30, 40 and 500C) and concentrations (from 20-100 v/v %). The inhibitor was found ... -
Integration of the energy recovery step in municipal wastewater treatment chain: a case study of Moshi municipality, Tanzania
(NM-AIST, 2020-06)The energy demand which is expected to increase more worldwide has sparked the interest of researchers to find sustainable and inexpensive sources of energy. This study aims to integrate energy recovering step into ... -
Investigating the potential of producing eco-friendly liquid biofertilizer from domestic wastewater
(NM-AIST, 2023-08)Water bodies experience environmental challenges such as eutrophication due to poor management of domestic wastewater in developing countries. Meanwhile, the explosion in population of the world has resulted in a 1.8 ...