Sludge drying is the process of transforming sludge into agricultural reusable products or green fuel. The removal of water reduces both the storage volume and the transportation costs, since a reduction of 80% by volume and 90% by weight may be achieved.
Ιn recent years drying and solar drying in particylary is an emerging green process which aims to potencial agricultural reuse or thermal and electrical energy production using co-incineration. (green fuel)
The odour produced is one of the biggest challenges faced by thermal and solar drying facilities.