Continuous Dewatering System for Dredged Sediment With High Water Content
Type:
Presented during:
WODCON XVIII - 2007 Orlando, Florida, USA
Authors:
Oida
Abstract: The Eco-Screw system provides a new method of mechanical dewatering that allows volume reduction and reuse of dredged sediment. A screw press, which is a core tool of Eco-Screw system, has not been used frequently in soil treatment. However, it can be used for realizing a compact system that allows efficient and continuous dewatering. The system has been developed to allow continuous treatment of a wide range of soil, including fine dredged sediment with high water content. Two projects of dewatering dredged marine sediment have been conducted by using one of the largest machines in Japan with a screw diameter of 1350 mm.
Because the present system can perform dewatering while adding solidification material, the system is also effective for preventing the leaching of pollutant when dewatering polluted bottom sediment.
With its ability to reuse dredged sediment efficiently, extend the life of disposal sites, and treat polluted bottom sediment, the system can be a solution to various environmental problems.
Keywords: Screw press, dewatering, continuous-type, volume reduction, recycling