What works in the Hamburg container port under – in the truest sense of the word – the most difficult practical conditions does not pose a problem when it comes to preparing surfaces for a biogas plant. The emvau-schlacke suitable for this purpose has been quality-tested and is available in grain size 0/32 mm. It can also be used very well as a base for silo slabs, road construction and for the construction of floor areas for pigsties and cowsheds. The material costs are up to 40% lower compared to conventional building materials.