Aerobic composting, which is the controlled conversion of organic matter under exposure to oxygen, takes place either outdoors - for example, in the form of naturally ventilated mounds or heaps - or in well-ventilated vessels, storage rooms, or storage facilities. It can assist in the production of substrates or in energy production, which is why organic waste represents a valuable resource in the modern recycling economy . The key element in this process is sufficient ventilation of the organic matter, which provides the microorganisms with the oxygen they need to do their work. The better and more efficient the ventilation, the better the quality of the resulting compost, and the shorter the ventilation time, the lower the costs.