Ghana's Council for Scientific and Industrial Research-Water Research Institute (CSIR-WRI) has successfully developed an integrated system to convert fish wastewater into a valuable input for crop production. This innovation directly addresses both environmental pollution and food security challenges in the country.
The new system transforms nutrient-rich wastewater from fish farms into a resource for growing crops. This approach reduces waste discharge and makes more efficient use of limited water resources. It offers a sustainable solution for farmers, particularly those using earthen ponds, concrete tanks, reservoirs, and tarpaulin tanks for aquaculture.
This development fits into Ghana's broader economic strategy to enhance agricultural productivity and promote sustainable resource management. The nation consistently seeks innovative methods to boost food production, reduce reliance on imported inputs, and mitigate environmental degradation. This technology aligns with national efforts to achieve food self-sufficiency and adapt to climate change impacts, which often include water scarcity.
Dr. Seth Agyakwah, Head of Aquaculture at CSIR-WRI, announced this breakthrough at the Institute’s 2026 Mid-Year Review in Accra. He explained that the Integrated Agriculture-Aquaculture System involves carefully assessing the nutrient content of fish wastewater. Farmers then use this water to grow crops according to their specific nutrient needs. Dr. Agyakwah confirmed that trials have already produced good yields, including cucumbers, demonstrating the system's significant potential for food production.
This technology holds several key implications for Ghana's agricultural sector and environmental health. It offers a practical way to reduce the environmental and health risks associated with using polluted water for vegetable irrigation. Currently, some farmers use water from gutters, potentially exposing consumers to harmful contaminants like heavy metals. The CSIR-WRI system provides a safer, more sustainable alternative. Furthermore, the technology serves as a climate-smart intervention, helping farmers make productive use of available water and reduce their vulnerability to climate shocks. Decision-makers in the Ministry of Food and Agriculture and the Fisheries Commission will likely consider this model for wider adoption, especially in water-stressed regions. However, access to financing remains a significant barrier for beneficiaries seeking to commercialize this technology, despite training support from ECOWAS and CORAF.
The integrated system offers a dual benefit: it reduces environmental pollution from aquaculture and simultaneously boosts crop yields. By reusing nutrient-rich water, farmers can potentially lower their costs for synthetic fertilizers. This economic advantage could make farming more profitable and accessible for smallholder farmers. The technology also contributes to a circular economy model, where waste from one process becomes a valuable input for another. This efficiency is crucial for Ghana's long-term economic resilience and environmental sustainability.
CSIR-WRI has already transferred this technology to youth, women, and men through training programs. These programs were supported by the Economic Community of West African States (ECOWAS) and the West and Central African Council for Agricultural Research and Development (CORAF). Beneficiaries received assistance in developing business plans and entrepreneurial skills. However, Dr. Agyakwah highlighted that securing financing remains a major challenge for these trained individuals to fully commercialize the technology. Addressing this funding gap will be critical for the widespread adoption and impact of the system across Ghana.
The appeal to the Ministry of Food and Agriculture to consider this integrated system as a model for food production underscores its potential national significance. Especially in areas facing water scarcity, this technology could provide a reliable and sustainable method for food cultivation. The system's ability to reduce vulnerability to climate shocks also positions it as a vital tool in Ghana's climate adaptation efforts. Improved coordination among institutions responsible for water, energy, food, and environmental planning, as suggested by Dr. Sylvester Afram Boadi of CSIR-WRI, would further maximize the benefits of such innovations.