Testimonials

Through the African Biodigester Component (ABC), farmers like Nalongo Judith Ngarukiye have:

Saved money: Eliminated the high cost of charcoal and firewood
Improved health: Created a smoke-free, clean kitchen for her family
Boosted yields: Used nutrient-rich bio-slurry to increase her harvest from 2 seasons a year to 3 

Watch the video : Video LinkLearn more: https://english.rvo.nl/subsidies-financing/see-clean-cooking/abc

Phelista Nguru now in her 70s has always cooked using firewood for her children. As a loving caring mother she had to ensure there is a meal for her family and friends when they visited. The weather does not matter – food has to be on the table.

The greatest challenge with firewood to Phelista has been during the wet season. The firewood used in her kitchen would be collect from her farm, in the neighborhood and/or bring down one of her few trees. In the wet season this wood would be used while still wet.

Wet firewood generates a lot of smoke. This smoke would find its way into phelista’s airway causing unpleasant irritation. This would lead to persistent coughs and teary eyes. Accumulated soot would occasionally fall on her carefully prepared meal.

Fetching firewood is time consuming. Trees are few and sparsely spread out. A lot of her valuable time would be taken up gathering some firewood for cooking just one meal. This converted cooking for a family into a full time occupation. Upon installation of a simple Tubular biogas plant, Phelista has now free time in her hands to take care of her animals as an income generating venture.

Heavy loads of firewood after bring down a tree hurt the back going down all the way to the feet ankles.

In search of firewood trees around Phelista farm would be down prematurely leading to environmental degradation. One would see her in her compound from across the other ridge. Biogas has now helped her to preserve her trees and have a refreshing green environment.

Use of biogas has not only improved Phelista’s health and environment it has also greatly improved her farm through use of bioslurry Enriched Compost.

Joseph is a coffee and banana farmer from the Mityana District in Uganda who is seeing amazing results in his garden. He uses bio-slurry, which he says works like both water and fertilizer at the same time. Even during the dry season, Joseph’s plants stay healthy and green while other farms struggle with the heat. His nephew also joins the video to explain how this simple, organic solution protects their crops and increases their harvest.

You can watch full video here: Video link

Meet Joseph from Biogas Solutions Uganda Limited. He’s not just an expert; he’s a farmer seeing real results! 
He observed following results after switching to bioslurry:  

You can watch full video here : LINK

Meet Emmanuel Luwenga, a Bioslurry Officer who also puts the Bio-Digester technology to work on his own farm. What he is training to other farmers, he is also practicing.  While the cooking gas is great, for Emmanuel, the Bioslurry is the real game-changer!Here’s how Bioslurry transformed his farming:

Bioslurry is an excellent organic fertilizer because it is economical, free of chemicals, and enriches the soil with essential nutrients like Nitrogen, Phosphorus, and Potassium.

Storage: Keep bioslurry covered during storage to minimise nutrients loss.
Application Tips:
Liquid Bioslurry: Must be diluted with water before application on vegetables, beans, maize, and seedlings of all crops to prevent scorching. We recommend mixing 1 L of bioslurry with 2 L of water. However, for perennial or already established crops, no dilution is required.
Solid Bioslurry: Mix it into the soil like regular manure before planting your seeds.
Effective on all crops—from tomatoes and maize to coffee, bananas and beans—delivering strong growth without expensive chemicals. Watch the video to see the results from Uganda!
Want to learn more? Get in touch with Biogas Solutions Uganda Limited

 Humphrey Mawojha, a researcher from Pwani University, is testing the residual effect of bioslurry on soil moisture. Under a shadenet, he is comparing kale grown with bioslurry as a soil absorbent to a plot without it, to see how much water the soil can retain. This experiment helps demonstrate how bioslurry can improve moisture management, supporting healthier crops and more healthy soil.

Discover how versatile bioslurry can be with this simple “tea bag” fermentation method.
By mixing bioslurry with water at a 1:2 ratio, farmers can create a powerful foliar spray that works as both a nutritious fertiliser and a natural pesticide—boosting crop health and overall farm productivity. Watch the video to see how to prepare both animal tea (from bioslurry) and plant tea, and how combining them enhances pest control and plant growth. For more information, please contact African Bioenergy Program Limited.

Biodigester technology in Burkina Faso is improving household living conditions and supporting sustainable development. Implemented since 2009, it addresses climate change challenges while providing rural households with clean energy for cooking and lighting, and nutrient-rich bioslurry that boosts agricultural production and income. When a household uses a biodigester, approximately 0.33 hectares of forest are preserved annually, and carbon emissions are reduced by around 4 tons of CO₂ equivalent. Given the importance of this technology and the challenges faced by rural populations, the biodigester stands out more than ever as a key solution for improving life in rural areas.

Douglas, a biodigester technician from Pwani University in Kenya, shares how the university manages its canteen kitchen waste through a biodigester system. All leftover food and cooking waste are collected and used to produce biogas, which helps reduce greenhouse gas emissions while supplementing the fuel used in the university kitchen. He explains that the process is simple and time-efficient, requiring only about 30 minutes a day to feed the system. After that, it runs on its own. The system also produces bioslurry, a fully decomposed organic fertilizer ready for direct use on the farm. He encourages farmers to adopt this system, believing that bioslurry offers long term improvements to soil health and helps cut costs compared to chemical fertilizers, which have only short-term effects.

Steven Baingana, a farmer from Uganda, is very happy with his biodigester. The bioslurry has been incredible for his coffee and bananas, leading to heavier coffee beans and plants that are always green. Even during the flowering season, the flowers don’t fall off, and the plants don’t wither. “Bioslurry has helped us a lot,” he says.

In Bogossoni village, Mali, Namakolo Mounkoro shares how a biodigester—introduced through the Pro-ARIDES and African Biodigester Component (ABC) projects—has transformed her daily life. No longer cooking with wood, Namakolo now enjoys a cleaner, faster, and smoke-free kitchen. The biodigester not only saves her time and improves her health, but also produces rich compost that boosts her rice, fonio, and vegetable crops while supporting her livestock. “This technology has changed our lives. I’ve become stronger, more independent, and more respected in my community,” she says.

Awali Abdoul aziz, a farmer from Doumaiga, Niger conducted a simple but effective experiment on his peanut and bean field. He prepared two adjacent plots, where bioslurry enriched compost is applied in one and  organic household manure in another. Awali explains that the observation is clear. The part where bioslurry enriched compost was applied has better growth of peanut and beans.

A farmer from Uganda, who has been using a biodigester since 2007, shared how bioslurry has transformed his farming practices. He applies the bioslurry to his coffee and banana crops and also mixes it with maize bran to feed his pigs. He finds bioslurry easy to use and appreciates that it remains in the soil for a long time, improving soil health and fertility over time. Unlike chemical fertilizers, which he believes damage the soil, bioslurry supports long-term soil productivity.

As part of the ABC Program, Evelyn Muhinu visited a farm in Kenya where she observed remarkable improvements in coffee and other crops through the use of bioslurry. The farmer no longer needed mineral fertilizers. The contrast between the fields treated with bioslurry and those using mineral fertilizers was striking in both yield and soil health. This experience inspired Evelyn to install her own biodigester. Since then, she has seen noticeable improvements in her own orchard.

Wakinya Samuel, Chairperson of Bushika Integrated Area Cooperative Enterprise Ltd., is transforming coffee farming through biodigesters technology. He appreciates the support from Biogas Solutions Uganda Limited, Hivos, SNV, and ABPP. His farm now uses pipes to distribute bioslurry. This simple but powerful innovation has reduced labor, improved efficiency, and allowed the cooperative to grow organic coffee that meets market standards. For Samuel, it’s more than just farming, it’s a step forward in the fight against climate change.

A coffee farmer in Uganda, who manages a farm of over 6 acres, uses bioslurry to increase his crop quality and yield. The bioslurry helps the soil to heal and become rich, leading to a healthy, high-yield coffee harvest that is more appealing to buyers.

Moussa Fofana, a biodigester user from Mali, shares how applying bioslurry improved his tomato harvest.

Farmer Wevugira James, Uganda: difference between using manure or bioslurry as fertilizer

Bio-slurry rejuvenated my coffee farm and cut my input costs by 50% – Mugabe Paul, farmer in Kabarole District.