Depending on technical and legal requirements, two different types of roofs are used for our boxes:
- Air-tight box tarpaulin
- Semi-permeable filter membrane
Air-tight tarpaulin roofs require exhaust air treatment with a biofilter. It is also possible to design this system for positive or negative pressure, thus offering high flexibility for the desired process management. When using the semi-permeable filter membrane, the exhaust air can be filtered through the membrane. It should be noted that the surface area of the membrane filter must be adapted to the amount of rotting material.