School of Physical Sciences (Phys-Sciences) Collection
Permanent URI for this collection
Browse
Recent Submissions
1 - 5 of 716
-
ItemA report on the geologic and stratigraphic logging project of Semiliki Basin-Albertine Graben in Ntoroko District Western Uganda from 15th July to 24th July 2023(Makerere University, 2024)The geologic and stratigraphic logging project was conducted in semliki basin, Ntoroko district, western Uganda. Semliki basin is located in the central domain of the western arm of the Albertine graben. It is a pull apart basin formed when the Albertine graben, a product of active rifting, underwent transtensional strike-slip deformation that was controlled by already existing NE-SW graben-forming normal faults. The main aim of the field study was to acquire field training on how to collect and interpret stratigraphic, petrographic, sedimentologic and structural data which are important in hydrocarbon exploration. Some of the materials used during the study included a geologic hammer, Grain Size Scale, Jacob staff, handheld GPS, notebook and a geologic compass. The methods involved desk Study conducted at camp, fieldwork, sedimentary logging exercise, data collection, discussions, analysis and interpretation. The Semliki basin is covered by sediments that represent Middle Miocene to recent exhibiting a fining upward sequence underlain by possible Jurassic to Early Tertiary age sediments resting unconformably over the basement rocks. The stratigraphic sequence exhibited in the basin is divided into seven Formations (in decreasing age) namely; the Kisegi, Kasande, Kakara, Oluka, Nyaburogo, Nyakabingo and Nyabusosi formations. Four lithofacies were identified indicating different depositional environments (fluvial, deltaic and lacustrine). Lithofacies 1 is poorly sorted and coarse-grained sediments consisting cobble/pebble-size cemented together with fine to coarse grained sands and formed the contact between the basement and sediments. Lithofacies 2 is a massive reddish brown, coarse to medium quartz sands. Lithofacies 3 is grey, dark brown and army green clays with medium quartz sands and plant debris. Lithofacies 4 is grey to white silt. The basin is affected by intensive tectonic activity, that led to the formation of vast types of structures that include faults, joints, bedding, cross-bedding, laminations, unconformities, mud diapirs, and plunging folds among others. Geophysical data of semliki basin and shallow, high resolution (150-200 Hz) seismic data from an intraslope salt withdrawal minibasin in the Gulf of Mexico were availed for interpretation. This data was later analysed by softwares such as Oasis montaj (Geosoft), sedilog, Google earth Pro and Teclog64.The sediments of the Semliki Basin represent a petroleum play for hydrocarbon accumulations as all elements of a petroleum system were identified in the field. The presence of oil seeps in kibuku indicates that organic rich source rocks are present, an indicator of an active system thus great petroleum potential. Information from the field visit to sempaya hot spring indicate the presence of high enough geothermal gradients of over 67°C/km for the maturation and generation of hydrocarbons at shallow depths.
-
ItemGeologic mapping project report of area A, Igayaza Isingiro District, South Western Uganda( 2024)This geologic mapping exercise was carried out in Igayaza located in Isingiro district in southwestern part of Uganda. The area mapped is within the Karagwe Ankolean system of rocks which strati-graphically overly the Basement complex rocks. The Karagwe-Ankolean (K-A)system (1400-950Ma) in Uganda is the northern most extension of the Kibaran mobile belt. The sediments of this system occupy a continuous area in southern and central Kabale, southern Mbarara, Bushenyi, Isin-giro, Rakai and south eastern Masaka districts. The Buhweju plateau and surrounding hills in Bushenyi district belong to this system as well. This field work was aimed at imparting the skill required to carry out a geologic mapping exercise besides other aims such as familiarizing one’s self with field conditions and equipment, collection and interpretation of data among others. The area to be mapped was gridded, my group members and I exclusively mapped area A. This report contains data obtained within this region which includes the rock types, structures present, economic potential, stratigraphy, metamorphism of the area as well as the regional synthesis using the data obtained by other groups as well. In the mapped area, the major rock types observed include Quartzite, ferruginous shales, Phyllitics hale, Granite, phyllites and conglomerates. Mudstones and slates were also observed in other areas within the region that were out of the area A. All these rocks, being in a region greatly affected by various stress and deformation events such as faulting and folding possess the number of structures such as quartz veins, boudins, foliation, lamination and mud cracks, joints, beds and folds and folds most of which trended in the NW-Se direction, them a jorregional trend and a few in the NE-SW direction, the cross-fold trend. Some of these structures not only existed in a macro but also in a microscale as will be shown in the petrographic analysis. There are a number of economic activities in the mapped area such as quarrying of majorly quartz and its and mining of sand for the construction industry. Agriculture through growing of majorly Bananas in the valley sand the arena and rearing of livestock was also carried out.
-
ItemDesigning waste water treatment plant for Medipharm Pharmaceutical Industries (EA) Limited(Makerere University, 2023)The study was carried out at Medipharm Industries East Africa (EA) to design a waste water treatment plant (WWTP). Medipharm being a pharmaceutical industry requires clean and safe water in the manufacturing processes and doing other industrial activities hence a need to design a WWTP to supply sufficient water. Samples of waste water from Medipharm pharmaceutical industries (EA) were collected and analyzed experimentally to determine Potential of Hydrogen (PH), turbidity, color, total dissolved solids, Total Suspended Solids (TSS), Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD) and others. These were done to know how much their waste is contaminated and hence design the best method for waste water treatment for the plant. After sample analysis of the waste water, the best method identified was a combination of both chemical and biological processes. Combination of these two methods generate a clear effluent with residual COD) and BOD of 640 and 125 mg/L corresponding to 95.2 and 91% respectively. Aerobic biological treatment using feed batch operation permits COD removal rate of 800mg/L and average growth yield of 0.4% of biomass/g COD. The methods identified for the waste water treatment processes were flocculation, coagulation, aeration, disinfection, clarification and filtration. The other part of the project was to develop the block diagram (Figure 2), the process flow diagram (SFigure 1), the material and energy balance (Figure 3), , design calculation and sizing some major equipment used in the plant that cover a capacity of 30,000m3/day. After carrying critical economic evaluation considering other factors like cost of equipment, capital available, location of the plant, labor, capacity of the plant and others in mind the overall process was viable because the cost of operation will be reduced and so does the local community receive treated water from the designed plant.
-
ItemComparing the effect of binder on the quality of bagasse briquettes(Makerere University, 2026)Briquettes made from biomass, such as sugarcane bagasse, a by-product of sugarcane mills, is a renewable energy source. This research aimed at the production and characterisation of bagasse briquettes. The major raw material, bagasse, underwent drying, size reduction, sieving, addition of molasses and clay (binder), densification using a manual press and finally drying of the briquettes. Physical and chemical parameters investigated include density, shatter resistance, calorific value, moisture content, volatile matter, ash content and fixed carbon. The results show calorific value of bagasse was 17.29MJ/kg, cowdung-binder briquettes was 15.92MJ/kg, molasses-binder briquettes was 16.49MJ/kg. The analysis revealed a composition of 47.49% carbon, 5.133% hydrogen, 1.557% nitrogen and 45.446% oxygen. Therefore bagasse has a high calorific value and can be used for briquetting to replace fossil fuels and firewood. In addition, due to its availability, utilizing it as a fuel source has an economic advantage.
-
ItemCharacterization of microplastics from wastewater treatment plants in Kampala(Makerere University, 2025)This study aimed to evaluate the presence, types, and removal efficiency of microplastics (MPs) in wastewater treatment processes at Lubigi and Bugolobi Wastewater Treatment Plants (WWTPs) in Uganda. Wastewater samples were collected from both influent and effluent points across two sampling campaigns at each plant. Microplastics were characterized based on shape, revealing that beads, fragments and fibers were the most dominant types across all samples. Quantitative analysis indicated that Bugolobi WWTP achieved consistently high MP removal efficiencies, ranging from 87.24% to 95.93%, while Lubigi WWTP exhibited a wider range of performance, from 30.99% to 94.10%. This inconsistency at Lubigi suggests possible operational fluctuations or infrastructural limitations. Supporting physicochemical analyses showed reductions in turbidity, BOD, COD, and nutrient levels between influent and effluent samples, validating the general effectiveness of the treatment processes. The findings highlight the need for improved treatment infrastructure, regular monitoring, and policy-level attention to microplastic pollution in wastewater management systems.