By Irene Best Nyapendi
Waste was once defined only as something with no purpose, but this is no longer the case.  The definition of waste as something useless is not accurate among a growing number of Uganda Christian University (UCU) students and staff who are informed and involved in various resource recovery initiatives. 

Most recently, the Faculty of Engineering, Design, and Technology (FEDT) at UCU invited at least 12 farmers from within the Mukono area to learn what the institution is doing to recover resources from waste. On September 11, a training session for the dozen farmers introduced them to organic waste management approaches, biogas technology, occupational health and safety measures and application of bioslurry in agriculture. The training was facilitated by a team that included Ass. Prof. Eleanor Wozei, Ass. Prof. Sarah Kizza-Nkambwe, Mr. Arnold Mugisha, Mr. Okot Innocent, Mr. Eddy Ojara and Dr. Miria Agunyo. Agunyo is the Dean of the Faculty of Engineering, Design and Technology and the principal investigator of the project.

Farmers walked away having learned how biogas, a renewable energy fuel, is produced from biodegradation of organic waste streams, including food and animal waste. They also learned how the bio-slurry can be used as fertilizer for their crops. Through this technology, greenhouse gas emissions, such as of methane, are prevented, as well as the pollution of soil and water by the waste from landfills. The training took place at the UCU Biogas Plant, which was constructed and commissioned in September 2023, with support from Bingo Projektförderung (project funding) in Germany.

Under this project, Dr. Agunyo said UCU is working hand in hand with the Artefact Centre in Germany to train people how to make simple biogas digester systems while promoting the use of other by-products, such as bioslurry. 

She added: “We want biogas technology to be something an ordinary person can do with very little support.”

Through the Bingo project grant funding of 30,000 Euros ($33,478), UCU installed a 12-cubic-meter digester tank that converts waste into biogas at the UCU water treatment plant and serves as a teaching tool for waste management and construction of digesters. Artefact Centre is doing the same in Germany, demonstrating simple do-it-yourself systems, enabling young people to appreciate the technology through traineeships.

“Recently, we fabricated our own digesters using plastic containers, which has helped us explain how simple biogas technology can be, from construction to operation,” Dr. Agunyo said. 

“The biogas we produce is used in the UCU kitchen, and the bioslurry is used as fertilizer in our demonstration gardens and this component was carried out by our colleagues from the Faculty of Agricultural Sciences, led by Dr. Rosemary Bulyaba.”

The Bingo Project aimed to demonstrate that as a university, we can sustainably manage the organic waste streams generated from within UCU and use the biogas produced to substitute firewood use at the UCU kitchen, hence promoting the use of clean cooking fuels and enhancing farming through the use of bioslurry.

Farmers Eager to Implement Change

Some of the participants who attended the training indicated their interest to make changes.  

“I’m tired of using charcoal, and I am excited to use waste to make biogas because it’s clean and will help me prepare meals faster,” said Prossy Birungi, one of the farmers who attended the training.  “Biogas is a double blessing; I hope to use it for cooking and the residue as manure.”

She commended UCU for the hands-on training, which demystified biogas technology. 

“I used to hear rumors about biogas on TV, but I’m grateful for the opportunity to learn how to make and use it,” Birungi said. 

Another farmer, Allan Kakembo, from Bugujju in Mukono, noted that manure and animal feed have been costly. He is hopeful that the bio-slurry used in his banana and maize plantation will improve production while reducing expenses.  

“Waste has been a challenge to me, and I am glad I can now benefit from it,” Kakembo said. “I look forward to using waste from my kitchen and animal waste to make biogas, instead of dumping it.”