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Every year, many companies in various fields (civil engineering, the agri-food industry, dredging, water treatment…) produce large volumes of both mineral and organic sludge. Controlling the purification and drying of these sludges has great potential starting from the start of the life cycle of industrial and urban systems. It is estimated that 50 million tons of sludge is dried for an estimated cost of between de 500 million and 1 billion euros each year in France.

These mineral sludges are very difficult to dry. Consequently, chemical additives (coagulant-flocculants) are used to improve their filterability. This could result in the filtered water and the filter cakes being contaminated.

The high water content of sludge considerably increases volumes and transport costs to downstream processes.

Current costs and treatment time remain high (between 0.4 and 1 kWh/kg) and takes several hours or even days in the case of thermal drying.

DESHYBOU aims to design a system which would allow the water content of sludge to be stabilised and reduced as much as possible with lower energy consumption and without the use of chemical contaminants. The process uses physical treatment by filter press assisted by an electric field which is generated by a conductive textile membrane filter. The DESHYBOU prototype will be implemented during the project and tested on sites which have sludges of various origins and in particular of aquicultural origin.

Partners :





Financers :

This project, labellised by Up-Tex Pole of Competitiveness, was co-labellised bu Pôles AQUIMER and TEAM² on the 27th of November 2013.


16 rue du Commandant Charcot
62200 Boulogne-sur-Mer F

Tel : 00 333 21 10 78 98

Fax : +33 3 21 30 33 22



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