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.
Agriculture & Environment
RUFS Project Team Trains Smallholder Farmers in Mbale City in Smart Agronomic Practices
Overview
Following stakeholder engagements in Mbale City and Kasese Municipality to introduce Phase II of the Resilient Urban Food Systems (RUFS) Project, it became evident that farmers in both regions face a range of challenges that significantly impact agricultural productivity. Among the most pressing issues are frequent floods, landslides, waterlogging, and prolonged periods of drought, all of which threaten food security and the livelihoods of smallholder farmers.
In response, the RUFS Project team has designed a series of targeted interventions aimed at addressing these climate-related challenges. Central to these efforts is the provision of specialized training to enhance farmers’ capacity to adapt and thrive in the face of environmental stressors. Through these trainings, smallholder farmers in Mbale City and Kasese Municipality will be equipped with practical knowledge and skills in climate-smart agronomic practices that promote sustainability and resilience. Smart Agronomic Practices, as promoted in the training, focus on techniques that improve yield while conserving natural resources. This includes composting, pest control using natural extracts, crop rotation, intercropping, and the adoption of drought-resistant crop varieties. By prioritizing ecological balance and resource efficiency, the RUFS project aims to protect urban communities from the effects of climate change, price volatility, and food insecurity.
Training on smart agronomic practices in Mbale City
As part of this initiative, over 20 smallholder farmers in Mbale City recently received extensive training on Smart Agronomic Practices. The training, conducted from 6th to 7th October 2025 at Emilna Royal Mixed Farm in Industrial City Division, Mbale City, forms part of a broader strategy to strengthen urban food systems by empowering farmers with sustainable, adaptive, and cost-effective farming techniques tailored to the realities of a changing climate.
Led by Prof. Frank Mugagga from the Department of Geography, Geo-Informatics, and Climatic Sciences at Makerere University, and funded through the AgriFoSe2030 Programme, the RUFS project aims to create a ripple effect of knowledge transfer, particularly in informal and peri-urban communities where agriculture remains both a livelihood and a cornerstone for food security. Phase II of the RUFS project sets out to: 1) Strengthen flood and drought resilience in urban communities through strengthened stakeholder collaboration in Mbale and Kasese, 2) Raise community awareness on climate risks and equip residents with preventive and adaptive skills, 3) Integrate indigenous and local knowledge into policy and planning for more context-relevant decision-making, and 4) Co-develop knowledge with both state and non-state actors to promote inclusive and evidence-based decisions.
Training in the production of organic fertilizers and pesticides
During the two-day training, farmers were introduced to practical techniques for producing organic fertilizers and pesticides using affordable, locally available materials. Emilna Royal Mixed Farm, the training venue, and home of one of the project beneficiaries, Ms. Emily Namalwa, served as a practical learning hub where theory met practice. Led by Mr. Henry Stanley Mbowa, Head of Research at AidEnvironment and a member of the RUFS Project, and backed by the Mbale City technical team, the hands-on sessions demystified the process of creating environmentally friendly agricultural inputs such as compost and bio-pesticides.
Step by step, the enthusiastic farmers were trained to formulate effective organic fertilizers and pesticides using locally available materials such as cow dung, animal and human urine, ash, onions, pawpaw leaves, pepper, tobacco, luwoko (Phytolacca dodecandra), and muluuku (Tephrosia vogelii). These natural alternatives provide a sustainable response to the rising cost and environmental impact of synthetic inputs. They not only enhance soil health and increase crop productivity, but also reduce chemical residues in food, promoting safer and more resilient farming practices.
While conducting the hands-on sessions, Mr. Mbowa emphasized that these solutions are not only effective but scalable. “These are techniques that require no expensive inputs. Farmers can adopt them right away using the resources they already have at their disposal,” he said.
As part of the training, Mr. Whepukulu Juma, a dedicated urban farmer and President of the Mbale City Food Systems Platform, briefed the farmers on the critical steps and best practices for preparing a food nursery bed. Drawing from his experience, Mr. Whepukulu highlighted the significance of proper soil preparation, emphasizing soil health and nutrient management as foundational to successful seedling development. He also stressed the importance of selecting high-quality seeds suited to local conditions and demonstrated effective maintenance techniques such as regular watering, timely weeding, and shading to protect young seedlings from excessive sun or rain.
According to Prof. Mugagga, the trainings that will be conducted over the next 18 months are a response to the urgent need for cities to reimagine their food systems amid rapid urbanization. “Urban agriculture is no longer an option, it is a necessity. Our goal is to empower smallholder farmers with knowledge that makes their practices not only productive but also sustainable and adaptive to climate stress,” Prof. Mugagga stated.
Farmers’ views on the Training
- Ms. Emily Namalwa, an urban farmer and proprietor of Emilna Royal Mixed Farm, expressed appreciation for the training. Her farm, located within Mbale City, produces a wide range of crops including tomatoes, sukuma wiki (collard greens), eggplants, matooke (plantains), and passion fruit, alongside poultry farming.
- Reflecting on the impact of the training, Ms. Namalwa said: “This has been eye-opening. I have learned that many of the resources we need to feed and protect our crops are readily available in our surroundings. What we once considered as waste can actually be transformed into valuable inputs for farming. This approach not only reduces costs but also promotes sustainability.”
- She further narrated how the RUFS training reshaped her perspective on land use for farming: “Before this, I focused solely on cultivating coffee on a one-acre piece of land located far from my home. I never imagined that I could turn the small 100 by 100 plot around my house into a productive farm. Thanks to the training on urban agriculture, I now understand how to make the most of even limited space for food production.”
- Citing the benefits, Ms. Namalwa expressed gratitude for the continued support RUFS extends to smallholder farmers. “RUFS has given us the knowledge and tools to make urban farming not just possible, but profitable. I am truly grateful for their efforts in empowering farmers like me in Mbale City.”
- According to Mr. Mudoma Cassim, Chairman of the Nabuyonga Horticulture Farmers’ Association in Industrial City Division, Busamaga, Mbale, the training provided by the RUFS project was both timely and impactful. “For a long time, our farmers have heavily depended on inorganic fertilizers purchased from commercial outlets. Unfortunately, these fertilizers are not only expensive but also contribute to the degradation of soil health over time, leading to reduced productivity in the long run. The training we received on the production and use of organic fertilizers and pesticides has opened our eyes to a more sustainable and cost-effective alternative. By learning how to produce organic fertilizers and pesticides locally, we can significantly reduce the cost of inputs while improving soil fertility and overall yields.”
- “I would like to extend my sincere gratitude to the RUFS project team and their funders for this valuable initiative. It is my earnest appeal that such trainings continue, not only on the production of organic fertilizers and pesticides but also on other important aspects of sustainable farming practices. Additionally, I humbly request that the project considers supporting farmer groups like ours with irrigation equipment, such as spray pumps. This would greatly enhance our capacity to maintain consistent production even during dry spells, ensuring food security and stable incomes for our members.”
- Mr. Ssenkoto Julius, a dedicated farmer from Industrial City, Masaba in Mbale District, is equally grateful for the support provided by the RUFS Project. He specifically commended the hands-on training he received on producing organic fertilizers and pesticides using locally available materials, a skill he believes is not only cost-effective but also environmentally sustainable. “I primarily grow tomatoes, but I also cultivate sukuma wiki (collard greens),” he stated. “The knowledge imparted during the training was incredibly valuable. I have already begun applying the organic methods on my farm, and I am keen to observe the difference in performance between these natural products and the conventional ones purchased from agro-shops.” Mr. Ssenkoto also appealed to the RUFS Project to consider extending similar training opportunities in animal husbandry. “Many of us are mixed farmers,” he explained. “Equipping us with skills in livestock management would greatly enhance our productivity and improve our livelihoods.”
- Ms. Nekesa Josephine, a horticulture farmer from Northern City in Nkoma, Mbale District, appreciated the RUFS Project team for the training, highlighting its potential to transform farming practices in the region. “I am truly grateful for this opportunity. The training has opened my eyes to more sustainable and cost-effective methods of farming. I have already started experimenting with the production of organic fertilizer using cow dung, a practice I had not considered seriously before. If it proves successful, it will greatly reduce our dependence on expensive chemical fertilizers bought from agro-vet shops, which many of us struggle to afford. This kind of knowledge is not only practical but empowering, especially for smallholder farmers like myself. I sincerely hope that these trainings can be scaled up and extended to cover livestock management. Training in animal husbandry would go a long way in helping us improve both crop and animal productivity, ultimately boosting our incomes and food security.
During the training programme, participants were tasked to document the current status of their farms and agricultural activities. Coordinated by Mr. Peter Kasaija, a member of the RUFS Project, the exercise was intended to support monitoring and assessment of the impact of the RUFS Project initiatives.
The team will hold a similar engagement in Kasese Municipality from 12th-15th October 2025.
More photos from the training
Pictorial on the training:https://drive.google.com/drive/folders/17NeSVJvLn6wJjtzodL25XtN5arnXXNdz?usp=sharing
Introduction
The Sustainable Off-Grid Solutions for Pharmacies and Hospitals in Africa (SophiA) is providing sustainable off-grid energy supplies and water free of bacteria and viruses for rural and remote health facilities in Africa, thereby accelerating the sustainable development, growth and economic transformation, and ensuring improved access to energy and health services for all.
Using various technologies, such as photovoltaics, solar thermal, electrical and thermal storage, water treatment, and natural refrigerants with low global warming potential, SophiA has developed and manufactured locally innovative, modular, affordable, and efficient solar powered systems for providing:
- Safe and clean drinking water, free of bacteria and viruses, and deionised water for medical purposes.
- Hot water and steam production for thermal requirements of the hospitals.
- Cooling of medicines and food at +5°C.
- Low temperature storage of blood plasma and vaccines at -30°C.
- Ultra-low temperature storage of sensitive medication (e.g. some Covid-19 or Ebola vaccines) at -70°C
In addition, PV MedPort, a simple and 100% solar-powered solution has been developed and tested as a mobile health care station in small remote areas in 4 different geographical conditions in Africa.
SophiA systems have been manufactured in Africa and will provide, for the first-time, innovative solutions based on climate-friendly natural refrigerants to cover cooling demand for three different temperature ranges (-70°C, -30°C and +5°C). The systems have been tested and demonstrated at four rural hospitals in remote regions throughout the African continent covering the major geographical regions and different climatic conditions in Burkina Faso, Cameroon, Malawi and Uganda.
Launch of the SophiA Project Facility at Buvuma Health Centre IV
The SophiA Project facility installed at Buvuma Health Centre IV was officially commissioned on 30th September 2025, by the Vice Chancellor of Makerere University, represented by the Dean, School of Food Technology, Nutrition, and Bio-systems Engineering at CAES, Dr Julia Kigozi.
The event was attended by over 100 guests including local government officials, healthcare professionals, university staff and students, traders, and community members. The occasion showcased the transformative technologies introduced under the SophiA Project, aimed at enhancing energy access and health service delivery in off-grid communities.
Speaking at the event, Prof. Nicholas Kiggundu, the Project Coordinator in Uganda, outlined the advanced systems installed at Buvuma Health Centre IV. These include:
- Electricity Generation: A 36 kWp photovoltaic (PV) solar system supported by a 13 kVA standby generator ensures continuous power supply.
- Water Systems: Provision of safe drinking water through ultra-filtration and de-ionized water using membrane capacitive de-ionization technology.
- Thermal Energy: Hot water and steam generation for cooking, bathing, and sterilization, using thermo-energy storage.
- Solar Cooking: Outdoor cooking with Scheffler reflectors capable of reaching temperatures up to 200°C.
- Refrigeration: Environmentally friendly cooling units maintain medicine at +5°C, blood plasma at -30°C, and vaccines, including for COVID-19 and Ebola, at required temperatures using natural refrigerants like propane (R290).
- Maternity Support: Installation of Xsol water heaters to provide warm water in the maternity wing.
Additionally, a 2 kWp PV MedPort was installed at Lukale Health Centre III, offering reliable electricity for disease screening and youth outreach services. Both installations feature containerized units integrated with a Supervisory Control and Data Acquisition (SCADA) system for real-time monitoring and operational safety. Key safety features include external ventilated compartments for flammable refrigerants and systems to discharge surplus solar power to the ground.
The excess energy generated by the PV system not only powers the health centre at night but also supports critical services such as the neonatal unit, further extending the project’s impact.
The launch also featured a tour of the facility, with an interactive question and answer session focusing on system safety (such as propane compartment ventilation) and scalability.
Now fully operational, the systems provide over 18 hours of reliable electricity daily, surpassing national averages, and enables vaccine storage critical for outbreak response. Buvuma Health Centre IV is set to serve as a learning laboratory for Makerere University students and other institutions.
The project was implemented in collaboration with the Ministry of Health and 12 consortium partners, with support from the European Climate, Infrastructure and Environment Executive Agency (CINEA). Local stakeholders, including the Uganda Revenue Authority (URA), Uganda National Bureau of Standards (UNBS), and Buvuma District Local Government (DLG), also contributed significantly.
Remarks by the Vice Chancellor
In his remarks delivered by Dr. Julia Kigozi, the Vice Chancellor expressed gratitude to the late Prof. Noble Bannadda for his pivotal role in crafting the project. He thanked Prof. Nicholas Kiggundu, the Principal Investigator, for successfully implementing the project at both Buvuma Health Centre IV and Mua Mission Hospital in Dezda, Malawi. He also thanked other SophiA Project team members at Makerere University namely: Dr. Denis Muhangi (CHUSS), Dr. Sarah Bimbona (COBAMS), and Mr. Alvin Asingya (CAES), and institutional partners.
The Vice Chancellor appreciated the European Union for funding the SophiA Project alongside several other initiatives at Makerere University.
Compiled by Prof. Nicholas Kiggundu – PI, SophiA Project/member of staff in the Department of Agricultural & Bio-systems Engineering at CAES, Makerere University.
More about the project at – https://news.mak.ac.ug/2025/07/sophia-project-upgrades-health-infrastructure-at-buvuma-health-centre-iv-trains-technicians-for-maintenance-works/
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