This method is used to process and stabilise the organic fraction of municipal waste, thus reducing greenhouse gas emissions and leachate drain. Not only does this relieve pressure on the environment, the stabilised waste is also easier to landfill.
Processing separately collected organic waste, composting produces a high-quality organic fertilizer which can replace chemical fertilizers in agriculture, winegrowing and landscaping. Besides supplying valuable nutrients, compost enhances the building of soil humus and improves soil structure, thereby increasing soil yields. In view of a growing world population the benefits of composting can make a major contribution towards meeting the rising demand for food.
Phosphorus is one of the primary nutrients of the ecosystem. Sewage sludge contains high concentrations of plant-available phosphorus. Owing to the limited availability of mineable phosphate deposits worldwide recovery of phosphorus from sewage sludge is becoming increasingly important. Compost recovered from sewage sludge treatment is a first-grade fertilizer for use in agriculture.
As the economy grows the demand for energy will also increase. To be able to reduce the burning of fossil fuels, calls for alternative fuels are becoming ever more urgent – for example from the cement industry. Bio-drying offers an ideal solution: Suitable for processing mixed municipal waste or its individual substreams, bio-drying produces high-calorific waste components which can be easily separated and used as a substitute fuel.