Penta-Ocean Construction Co., based in Japan, has developed technology that can dehydrate soil with high water content that results from excavation and dredging work, making use of that soil possible.
Soil excavated during tunnel construction or similar projects is treated with a polymer coagulant that homogenizes it while also giving it a texture that can be easily pressed.
The soil is then placed in a tube containing a large screw, with the screw shaft increasing in size toward the exit. As the screw turns, the soil moving down the tube is compressed and water is extracted from it.
Soil processed in this manner is strong enough to be reused in levee construction and land reclamation work. The new system can thus reduce treatment costs to 70-80 percent of the expenses for discarding the soil as industrial waste.
The company will offer soil treatment services to local municipalities and other organizations that order construction work, expecting soil recycling needs to increase as environmental awareness rises. It also aims to use its unique technology to spur an increase in construction orders.Latest from Construction & Demolition Recycling
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