Browsing by Author "Oluk, Isaac"
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Item Development and performance evaluation of a Pedal Operated Seed Cleaner (POS‑Cleaner)(SN Applied Sciences, 2021) Akatuhurira, Wilber; Tumutegyereize, Peter; Oluk, Isaac; Baidhe, Emmanuel; Kigozi, Julia; Mayanja, Ismael; Balimunsi Kivumbi, HusseinTraditional grain cleaning methods are labor-intensive, time-consuming, and yet very inefficient. The use of available mechanical seed cleaners is widely limited since they are expensive to own, operate, and maintain. A Pedal Operated Seed Cleaner (PoS-Cleaner) was developed and its performance evaluated. Appropriate engineering principles and methodologies were used in the sizing and construction of the machine. The cleaner consists of a bicycle-like pedaling system, hopper, a centrifugal fan, and three cleaning sieves which include two inside interlocking sieves (one sieve fixed and the other adjustable); whose meshes can be adjusted to be larger than the size of the unclean seeds by longitudinally translating the second sieve to achieve the appropriate seed size. This allows trapping of impurities larger than the seeds. Cleaning rates of 576.5 kg/h, 375.8 kg/h, and 377.4 kg/h for maize, beans, and groundnuts were obtained respectively. Maize, beans, and groundnuts had their highest cleaning efficiencies of 95.09%, 87.61%, and 81.67% at inner sieve sizes of 13 mm, 16 mm and 10 mm respectively, pedaling speed of 60 rpm. The PoS-Cleaner presents a more viable cleaning option for smallholder farmers in rural and remote areas with no access to the national grid, therefore producing highquality seeds. This will eventually facilitate agricultural value addition and increase individual family incomes in Uganda.Item Development of maize cob-based biochar filter for water purification(Water and Environment Journal, 2021) Oluk, Isaac; Nagawa, Christine Betty; Banadda, Noble; Tumutegyereize, Peter; Achaw Owusu, ProsperThe study aimed at biochar production from maize cob and its performance in improving water physiochemical attributes. Three feedstock masses (2, 2.5, 3 kg) were used for biochar production. Nine treatment combinations of T1L1, T1L2, T1L3, T2L1, T2L2, T2L3, T3L1, T3L2 and T3L3 in triplicate were used for biochar performance. Biochar yield of 50% was averagely achieved at slow pyrolysis conditions (300 to 600°C) and 120 min residence time. Biochar had 4.13% moisture content, 6.86% ash, 17.70% volatile matter, 71.28% fixed carbon, and a pH of 10.27. Odour, colour, and total hardness of the wastewater improved after filtration using biochar to acceptable levels for potable water use. Total hardness reduced by 51.9% in T2L2 and 44.4% in T3L2. Findings front maize cob biochar as a purification technology for domestic potable water use. There is need for maize cob biochar performance on heavy metals and when it is sandwiched with other materials.Item Potential Benefits of the EAPI Agro-processing Skills Training Course on Micro, Small, and Medium Scale (MSMEs) Agro-processors in Uganda(Journal of Food Industry, 2020) Kigozi, Julia; Baidhe, Emmanuel; Oluk, Isaac; Muzira Mukisa, Ivan; Muyanja, Charles; Namubiru, Leatitiah; Katarikawe, BrendaMicro, Small, and Medium Scale Enterprises (MSMEs) in Uganda contribute significantly to socio-economic growth and development. Several training programs have been organized to upgrade the skills and competencies of personnel in these agro-processing enterprises but these often lack a wholistic approach. An Empowerment of the Agro-Processing Industry (EAPI) training was organised to include eight modules covering the key concepts necessary for an agro-processor. These included; food process and value-chain management, product optimization, national and international food standards, Good Management Practices (GMP) and hygienic food processing, quality control, waste management, infrastructure development for food production and food product marketing. This study assessed the potential benefits of the EAPI training on 40 agro-processors from 40 selected agro-processing facilities. Upon completion of a three-day skills development training, MSME practitioners were interviewed using a semi-structured questionnaire. Descriptive, scale, and thematic analysis were used in the study. The questionnaire used was reliable (Cronbach’s coefficient alpha for relevancy = 0.873). Agro-processors found all modules relevant with an average score ranging between 8.7 and 9.5 on a scale of 10. Increase in knowledge, and interaction between stakeholders were the most outstanding potential benefits of the training. Respondents anticipated improving their operations after the training. Provision of handouts, increasing the number of days for the training, and simplifying the language of delivery were some of the suggested improvements. The study suggests that trainings of this nature could improve operations at different agro-processing facilities.