Hedafor builds drying houses for sludge thickening around the world.
Drying of sludge in a Venlo or wide-span drying house reduces moisture content with minimal external energy input. This low-temperature drying, using energy from the sun, is often described as the most sustainable method for dewatering of sludge. The size of these kinds of Venlo or wide-span greenhouses currently ranges from 300 to 25,000 m². We have completed installations in France, Germany, the US and Ecuador.