By subjecting digestate to an aerobic treatment it is possible to produce humus. Humus, a nutrient-rich organic substance, is critical to soil health as it improves soil structure, increases water and nutrient retention capacity, and provides a favourable environment for vegetation growth. Timo Junius, Consultant for soil management at PLOCHER GmbH explains the benefits of this nutrient and how its production linked to biogas plants is part of a circular approach that not only promotes agricultural productivity, but also contributes to environmental sustainability in general.