Once Water Treatment Plant (WTP) for public supply is considered as an industry, it uses water as a source, chemicals and physics and biologic steps to treat the water and, obviously, generate waste, which is called as sludge. Most of these WTPs in Brazil use surface water as a source and a conventional complete cycle treatment type. The WTPs sludges are found mainly in clarifiers and backwash water filter. Unfortunately, most of Brazilian WTPs launches its sludge directly into water resources,

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... without previous treatment, violating management practices and the Brazilian legislation. A solution for this sludge is to remove its water and after that, recycle the water removed and use the dried sludge in other activities, for example in ceramic production, in non-structural buildings and even to generate energy. This paper presents a natural and sustainable technology to dewater clarifiers WTPs' sludge and discusses possible uses for this processed waste.