Updated: July 2002

1. Systems for resource recovery from unification plant sludge

This system makes 100% effective use of purification plant sludge by recovering a number of materials from the sludge to precisely meet demand.

Block flow

Demonstration plant

2. System for resource recovery from construction sludge (drain materials and aggregates)

Using construction sludge generated by underground excavation projects (underpasses, subways, piling work, etc.), this system produces drain materials (crushed stone used to prevent soil liquefaction) and lightweight aggregates.

Drain material sample

3. System for resource recovery from crushing plant sludge

This system converts the sludge produced in huge quantities by the washing process of crushing plants to construction materials such as aggregates, roadbed materials and gardening soil.

Cogeneration system and system for converting sludge to resources

4. Reservoir sand deposit/sludge treatment system

There are more than 2,000 dams in Japan for electric power generation, flood control, irrigation, etc. Some of them, however, suffer from huge deposits of sand on the reservoir bottom that impair their function. In some cases, these sand cannot be removed for fear of producing sludge that would contaminate rivers downstream. This system makes effective use of reservoir sand deposits and sludge by dredging them up and turning them into construction materials and gardening soil according to the need at hand.

Sand deposits on reservoir bottom

5. System to treat organic sludge like night soil and sewage sludge for

By dewatering drying, incinerating and melting, this system reduce the volume of organic sludge for easy disposal. Fertilizers can be made by drying and fermenting the sludge, and the residues of incineration (ashes) can be baked and sintered to make construction materials and fill materials.

Block flow