What is a simple way to upgrade wastewater stabilisation pond systems in Africa so that the water can be reused for animal fodder production? Under the direction of Technische Universität Darmstadt, the joint project “EPoNa – upgrading wastewater ponds to generate irrigation water, using the Cuvelai-Etosha basin in Namibia as an example” has been researching into a comprehensive response to this question since the start of September.