Agriculture & Environment
Prof. John H. Muyonga Delivers Professorial Inaugural Lecture
Theme: Circular Bio-economy: Applications to the Agri-food Sector
In his Lecture, Prof. John H. Muyonga highlighted the nutritional value of waste from agri-food products and explained the measures that can be taken to minimize wastage
The Inaugural Lecture
A lot of what is thrown away as waste from agri-food products contains nutrients that are crucial for the body’s immunity. This was revealed by Prof. John H. Muyonga during his Professorial Inaugural Lecture held on 23 June 2023 at the Yusuf Lule Central Teaching Facility, Makerere University. Organized under the theme: Circular Bio-economy: Applications to the Agri-food Sector, the lecture was graced by the University Top Management led by the Vice Chancellor, Prof. Barnabas Nawangwe, and attended by academics and administrators from the 10 Colleges of Makerere, as well as the family of Prof. Muyonga. Prof. Muyonga.
The health benefits of waste from agri-food products
In his presentation, Prof. John H. Muyonga, a Professor of Food Science at the Department of Food Technology and Nutrition, College of Agricultural and Environmental Sciences (CAES), Makerere University revealed that waste of plant origin contains nutrients and a wide diversity of non-nutrient compounds (phytochemicals), that are associated with health benefits. “The non-starch polysaccharides from fruits, vegetables and whole cereals help prevent cancer, hypertensive, hypoglycemic, and hypochloresterol. Carotenoids found in coloured fruits and vegetables equally prevent hypertensive, cancer, obesity, and support vision. The phytosterols in cereals and legume cereals bran serve as antioxidants and help in the prevention of colon cancer and hypochloresterol effect, hypertensive, pytic acid, and kidney stone formation,” Prof. Muyonga explained, further highlighting valuable components of waste from selected food crops. Citrus peels and seeds contain Pectin, essences, ethanol, D-limonene, limonoids and flavonoids. Mango peels and kernels contain fibre, vitamins, carotenoids and polyphenols, kernal fat and pectin. Passion fruit seeds and rind contain pectin and linoleic acid. Banana peels have phenolics, beta-carotenoids, anthocyanins, fiber, amino acids, polyunsaturated fatty acids, vitamins, flavonoids and potassium, whereas Avocado seeds and peels contain carbohydrates, proteins, lipids, fibres, minerals, phenolics, flavonoids, and fatty acids. Prof. Muyonga also highlighted a number of valuable components in waste from animal-based foods emphasizing the need to minimize wastage. According to Prof. Muyonga, increased adoption of circular bio-economy principles can help minimise wastage. Circular bio-economy entails reuse of as much bio-waste as possible, resulting in multiple value added products from a given volume of harvested biomass. Circular bio-economy can be used to explore the use of waste streams as raw materials for products such as new food products, feed, fuel, industrial ingredients, bio-plastics, biopharmaceuticals, bio-cosmetics, enzymes, nutritional supplements, nutraceuticals, materials for tissue repair, plasma substitutes, microbes and adsorbents. Circular bio-economy decreases dependency on natural resources by encouraging sustainable goods that generate food, feed, materials and energy using biological resources.
Minimising wastage of agri-food products
During his 26 years at Makerere University, Prof. Muyonga has been key in developing research capacity on previously under researched foods including grain amaranth, jackfruit, pumpkins, Solanum anguivi (katukuma), and Nile perch, among others. Working with a number of partners, he has conducted research and come up with various technologies to minimize wastage in agri-food products. Given the Nutraceutical properties of jackfruit pulp, he has conducted research and developed protocols for drying jackfruit pulp using the Refractance Window Drying technology. He has conducted studies on pumpkin and produced shelf stable flours from seed and pulp of pumpkins. Flour from the seeds is high in phytochemicals and it is recommended for weight control. Together with his research team, they have processed sweetpotato products into shelf-stable value added products. He has also conducted research on jackfruit pectin. The work entailed extracting pectin from jackfruit and assessing its properties. He also worked on the production and utilisation of passion fruit powder. Other key activities included; Tamarind seed analysis and utilisation- Tamarind seed powder was found to be suitable for use as ingredient to enhance nutraceutical properties of juices and cookies; Nile Perch collagen and gelatin studies – Collagen has a unique amino acid profile that gives it peculiar properties, including the ability to form gels when dissolved in water; Nile Perch oil extraction and Characterisation- Fish oils are rich in omega 3 fatty acids. Omega 3 fatty acids contribute to brain development and protection against cardiovascular diseases, breast, colon and prostate cancer, inflammation, depression, pain and psychosis. He also worked on characterisation of cassava leaf, processing and utilisation. Cassava leaves were found to be high in proteins, carbohydrates, beta-carotene, polyphenols and ascorbic acid.
Future plans
In future, Prof. Muyonga intends to work on the characterization of by-products from more agri-food materials produced in Uganda. He also hopes to work on the application of novel and sustainable technologies in agri-food waste valorisation to improve extraction efficiency, efficacy and limit environmental impact; and to evaluate new applications of components of agri-food waste – e.g. in bio-based packaging and bio-preservation. Prof. Muyonga also plans to undertake policy and techno-economic analysis of valorisation options.
Remarks by the Vice Chancellor
According to Makerere University Vice Chancellor, Prof. Barnabas Nawangwe, an inaugural lecture is an occasion of significance in an academic staff member’s career at the university. It provides professors with the opportunity to share their achievements in research, innovation, engagement and teaching activities before an audience of members of the University community and the general public.
In his address, Prof. Nawangwe congratulated Prof. Muyonga for making all necessary preparations to deliver his Professorial Inaugural Lecture. “This is the way to go as we continue to boost our scholarship, image and reputation. The Professorial Inaugural Lecture should act as an inspiration to all of us as scholars to not only learn but also continuously disseminate our work. I want to implore other colleagues at the rank of Professor in the University to emulate Prof. Muyonga and also deliver their Professorial Inaugural Lectures.” The Vice Chancellor commended CAES for spearheading the initiative leading to Prof. Muyonga’s presentation and applauded the Professorial Inaugural Lectures Organising Committee (PILOC) led by Prof. David Bakibinga for a job well done in preparing for this event. Highlighting the significance of Prof. Muyonga’s lecture focus, “Circular bioeconomy: Applications to the agri-food sector”, the Vice Chancellor noted that it was quite novel and contemporary, testifying that Makerere University possesses the competencies and capacities to substantially address the national and global development challenges. “Our science, creation of new knowledge and innovations in this field will be crucial for national stability cognizant of Uganda’s rapid population growth and high levels of youth unemployment. As a premier university, we should harness the emerging opportunities including artificial intelligence which appears to be a game changer to find practical solutions to complex societal challenges at multiple scales,” he explained.
Remarks by the DVCAA
In his remarks, the First Deputy Vice Chancellor in charge of Academic Affairs, also host of the Professorial Inaugural Lectures, Prof. Umar Kakumba said Prof. Muyonga’s research works had demonstrated Makerere’s commitment and contribution to the realization of the national and global development agendas. “As academics, we have a duty to think and address the needs of the growing population, projected to reach 60 million in 2030 and 102 million in 2060. The research done by Prof. Muyonga contributes to the realization of the SDGs2,3,9,12 aimed at reducing hunger; ensuring good health and wellbeing, generating employment and income through innovation; and reversing the current consumption trends as well as promoting a more sustainable future.”
Prof. Muyonga’s biography
Prof. Muyonga holds a PhD in Food Science from the University of Pretoria, M.Sc. Food Science from Cornell University and a B.Sc. Food Science and Technology from Makerere University. He became full Professor of Food Science of Makerere University in 2010, and has served as Faculty at Makerere University since 1997. Prof. Muyonga was Head of the Department of Food Science and Technology from 2006 to 2011, during which period the Department transformed to the now School of Food Technology, Nutrition and Bioengineering and served as the pioneer Dean of the School. He has published over 80 peer reviewed journal articles, mainly in areas of nutraceutical and physico-chemical properties of traditional Ugandan foods, improvement of traditional food handling and processing methods, extrusion technology, novel drying techniques and agri-food waste valorisation. Prof. Muyonga serves as Associate Editor of two (2) international journals and his work has been cited in over 3,900 articles.
Prof. Muyonga has played critical roles in the development of capacity for food science and nutrition research and research translation in Uganda. He has led more than twenty (20) research and consultancy projects and raised over 20 million US$ for research, technology translation and institutional development. He has been key in developing research capacity on previously under researched foods including grain amaranth, jack fruit, pumpkins, Solanum anguivi (katukuma), and Nile perch, among others. As a university administrator, Prof. Muyonga coordinated the implementation of several institutional development initiatives, including a NORAD funded institutional development project for Makerere University’s Department of Food Science and Technology and the setting up of a Technology and Business Incubation Centre at Makerere University.
Under his leadership, the Department of Food Science and Technology and the School of Food Technology, Nutrition and Bioengineering initiated four (4) new degree programmes, registered great improvement in research infrastructure, greatly increased graduate students’ enrolment and graduation rates, markedly increased output of peer reviewed research articles and supported commercialisation of dozens of new food products. He has served on several boards, advisory and technical committees, and is currently Chair of the Management Committee of the National Agricultural Research Laboratories, as well as board member of Volunteer Efforts Development Concerns. Prof. Muyonga is a Fellow of the Uganda Academy of Sciences and professional member of the Institute of Food Technologists (USA). He was the 2009 TWAS young scientist, is an alumnus of the Global Young Academy, UN University and TWAS affiliate programme. He was previously member of the scientific advisory committee of the Bill and Melinda Gates funded Banana Biotechnology Programme and served as Technical Evaluator for the World Bank African Centres of Excellence for Central and Western Africa and for the European Commission research programmes. Prof. Muyonga is also a Rotarian and has served in several roles in his club (Rotary Club of Kampala North). He is a Paul Harris Fellow (PHF+3) and is actively engaged in numerous Rotary projects supporting the underserved.
Refurbished gate to boost the institute’s aesthetics, security, accessibility, and sustainability
Makerere University College of Agricultural and Environmental Sciences (CAES) has completed the refurbishment of the main gate at the Makerere University Agricultural Research Institute Kabanyolo (MUARIK). The renovation was carried out by students from both CAES and the College of Engineering, Design, Art, and Technology (CEDAT), under the supervision of their academic mentors.
According to the Principal of CAES, Prof. Gorettie Nabanoga, the revamped gate now truly reflects the spirit of Makerere University and will significantly enhance the institute’s visual appeal, security, accessibility, and sustainability. The refurbished gate was officially commissioned by the Vice Chancellor, represented by the First Deputy Vice Chancellor in charge of Academic Affairs, Prof. Buyinza Mukadasi. The ceremony was attended by the Deputy Vice Chancellor in charge of Finance and Administration, Prof. Winston Tumps Ireeta, alongside CAES staff, students, and partners.
About MUARIK
Established in 1953, MUARIK serves as a hub for numerous research projects and facilities within CAES. It houses centres such as the Makerere University Regional Centre for Crop Improvement (MaRCCI), the Makerere University Centre for Soybean Improvement and Development (MakCSID), the Continuing Agricultural Education Centre (CAEC), the Centre of Excellence in Waste Management, and the Consortium for Enhancing University Responsiveness to Agribusiness Development (CURAD).
Additionally, MUARIK hosts KOICA-funded projects, including a modern layers production unit and a climate-controlled greenhouse for vegetable production. These units operate independently but collectively contribute to MUARIK’s dynamic research environment.
MUARIK also houses research units for the School of Agricultural Sciences (SAS) such as the Biotechnology and Tissue Culture Laboratories, experimental fields, Horticulture and Livestock Units, and the black soldier fly project. It accommodates training and research facilities for the Schools of Food Technology, Nutrition, Bioengineering, and the School of Forestry, Environmental, and Geographical Sciences. It also hosts hostels for both local and international students who stay at the Institute to gain practical experience in production and research under typical farming conditions.
Enterprises and Research at MUARIK
Enterprises at MUARIK include approximately 100 acres of pastures, a dairy farm, feed mill, silage production, poultry unit, piggery unit, banana and coffee plantations, maize and soybean crops, horticulture, goat farming, and the recently revived rabbit unit featuring four breeds: New Zealand White, Chinchilla, California White, and Flemish Giant.
Current research initiatives focus on edible insects and worms as alternative livestock feeds, agroforestry, horticulture, and value addition in food processing. MUARIK maintains a strong partnership with the Uganda Flowers Exporters Association (UFEA), collaborating on the commercial testing of new flower species to diversify Uganda’s flower exports beyond traditional rose bouquets. Collaborative efforts also include identifying native natural enemies to control Chrysanthemum pests, working with UFEA, Wageningen University, breeders, and the National Agricultural Research Organization.
As part of Uganda’s National Agricultural Research System (NARS), MUARIK prioritizes research in biotechnology, tissue culture, plant breeding, improved farming methods, agro-processing, value addition, and marketing.
Tour to Assess the Capacity and Condition of Facilities at MUARIK
As part of the commissioning ceremony, the Principal of CAES, Prof. Gorettie Nabanoga, led visitors on a comprehensive tour of the Makerere University Agricultural Research Institute, Kabanyolo (MUARIK). The purpose of the tour was to provide first-hand insight into the institute’s current infrastructure, operational capacity, and ongoing challenges.
During the visit, Prof. Nabanoga highlighted both the strengths and limitations of the institute. While the tour showcased MUARIK’s potential as a hub for agricultural research and innovation, it also brought to light a number of critical issues affecting its functionality. Chief among these is the persistent challenge of land encroachment, which continues to threaten the integrity and sustainability of the institute’s operations.
In her remarks, Prof. Nabanoga commended Dr. Cyrus Ongom, the outgoing Director of MUARIK, for his unwavering dedication to safeguarding the institution’s land. She acknowledged his resolute efforts in the face of persistent threats and numerous challenges, emphasizing the vital role he played in preserving MUARIK’s integrity. “This year, we aim to further reposition MUARIK as a leading centre for agricultural innovation and production in the region,”said Prof. Nabanoga. “Our focus will be on strengthening research, fostering partnerships with stakeholders, and enhancing the capacity of our infrastructure to support sustainable and impactful agricultural practices.”
The Principal expressed gratitude to all who have supported the transformation journey of CAES. “As we celebrate our achievements today, we take this moment to recognize and honour everyone who has been part of our transformation journey,” the Principal said. “We are especially grateful to the Vice Chancellor, Prof. Barnabas Nawangwe for his unwavering support, which has been instrumental in driving the College forward.”
Delivering his remarks, the Deputy Vice Chancellor in charge of Academic Affairs (DVCAA), Prof. Buyinza Mukadasi, commended the CAES for its remarkable achievements in training and research.
“From my assessment, CAES has consistently excelled across its core mandates – training, research, production, and community outreach. The College has played a crucial role in advancing the agricultural sector through innovative research, high-quality academic programmes, and meaningful community engagement. These efforts have made a significant contribution to Uganda’s national development goals and the transformation of its agricultural landscape. Given its demonstrated success and strategic relevance, CAES is highly deserving of enhanced investment and funding to further expand its impact,” he stated.
CAES Annual Awards and Staff Recognition Ceremony
The CAES Annual Awards and Staff Recognition Ceremony celebrated the outstanding achievements of dedicated teaching, administrative, and support staff. During this special event, several members of staff were acknowledged and honoured for their exceptional performance, commitment, and contributions to the College’s success.
Commenting on the significance of the awards, Prof. Buyinza praised the initiative, emphasizing that such recognition serves as a powerful motivator. He highlighted how acknowledging excellence not only boosts morale but also inspires continued dedication and fosters a culture of high performance.
Click on the link below to access the list of staff recognized for exceptional performance.
More pictures from the event
It is with profound pride, reflection, and vision that I present the 2024 Annual Report for the College of Agricultural and Environmental Sciences (CAES) at Makerere University. This report is more than a summary of the milestones in 2024 – it is a powerful testament to what is possible when a dedicated academic community rallies behind a common purpose. It encapsulates the collective effort, ingenuity, and resilience of our faculty, researchers, administrators, technical teams, students, alumni, and partners – each of whom has contributed meaningfully to advancing our threefold mandate: Teaching and Learning, Research and Innovation, and Knowledge and Technology Transfer Partnerships.
Throughout 2024, we deepened our resolve to nurture not only competent graduates, but also purpose-driven leaders capable of shaping the future of agriculture, environmental stewardship, and food systems across Uganda, Africa, and beyond. Through transformative curricula, cutting-edge facilities, and a strong commitment to STEM-based experiential learning, CAES continues to empower a new generation of innovators – technically sound, ethically grounded, and globally aware.
Our academic programs continued to evolve in both quality and relevance. We offered 48 academic programs—including 15 undergraduate, 19 masters, 11 PhD, and 3 postgraduate diploma programs. A total of 2,339 students were enrolled in 2024, with 60% of undergraduate learning delivered through hands-on, field-based instruction. At the 74th graduation ceremony, 638 students graduated, including 20 PhDs, 104 masters, and 511 bachelor’s degree recipients. Notably, we celebrated 25 first-class graduates who represent academic excellence across disciplines.
Through over 100 partnerships, we translated knowledge into impact. Initiatives like CURAD, FTBIC, and MaRCCI empowered communities in agribusiness, food safety, and climate resilience.
I thank our entire community for your commitment and collaboration. Together, we are not only advancing knowledge but shaping sustainable futures across Uganda and beyond.
Prof. Gorettie Nabanoga
Principal, CAES
Follow the link below to access the full report;
https://drive.google.com/file/d/1nNsX8Cohq7whbC9zkd3j4DpBRa7kygDP/view
Agriculture & Environment
Climate Resilience and Sustainability Collaborative: 30 Masters, 6 PhD Scholarships 2025/2026
-
Agriculture & Environment4 days agoMUARIK Main Gate Gets a Facelift
-
Business & Management2 weeks agoCoBAMS Annual Report 2024
-
General1 week agoVice Chancellor Updates Media on Medical Drones, Road Safety Research & Various Issues
-
Agriculture & Environment1 week agoCAES Annual Report 2024
-
In Press2 weeks agoThe crisis of impressions in Uganda