Breaking Technology for Dewatering and Valorization of Sediment in France
Type:
Presented during:
WODCON XX: "The Art of Dredging" - 2013, Brussels, Belgium
Authors:
Mancioppi L, Dhervilly P, Levacher D
Abstract: Shore management of dredged sediments is an international issue. But shore management of dredged sediments is faced to the lack of disposal sites on land, to the high cost of storage (80 - 150€ per m3 in France) and of treatment. Faced with this problem, the company SEDIGATE offers an innovative solution for the shore management of sediments; the Nemeau process. This process is able to separate the solid from the liquid under a high flow and to resend clear water to its natural environment. Nemeau allows reducing the sediment volume by a factor ten. Technical performances of this process allow obtaining, at the end of the process, a material having a solid content between 50 to 65%. With these performances, the material at the end of the process can be directly used for application in road material or sent in a disposal area (Classes I, II and III, respectively for hazardous, non-hazardous and inert waste).
This process exists in different sizes depending on the input flow (Nemeau 250, 450, 1100…). The input flow can be up to 1500 m3/h.
Through this paper the characteristics and technical performances of Nemeau established through various projects and test phases are presented.
Keywords: Harbor sediments – Coastal management – Valorization – Dewatering