English: The circular economy takes nature’s material cycle as its model and attempts to achieve cascading uses without waste and without emissions. Organic residues and waste, from municipal collection (organic waste, green waste), from animal husbandry and breeding, as well as agriculture and arable farming, from the food industry and gastronomy, become clean, renewable energy, valuable organic fertilizer and compost for healthy soils. Dry Anaerobic Digestion or Solid-State Fermentation (SSAD) has proven to be the optimal technology for the utilization of these organic residues and wastes, which are predominantly available worldwide in a solid and stable form. This is regarded as the new generation of technology for a biogas plant (AD plant).