CSR Social Activities

Challenge of achieving zero wastewater in production processes by water recycling

Basic approach

The Toyota Boshoku group recycles wastewater generated in the production process and is developing water-less processes with the aim of achieving zero wastewater. Efforts are also being made to reduce water consumption by using rainwater as part of the water supply. The Company contributes to energy conservation through cooling and circulating water purification systems using proprietary filtration technologies.

Circulation recycling of water treated in septic tanks

The Toyohashi-Kita Plant in Aichi Prefecture has independently developed equipment that filters and reuses the water that has been used in the plant, and has constructed a mechanism that completely prevents generation of wastewater at the plant.
The Toyohashi-Kita Plant uses two types of water: potable water for drinking and industrial water used for cooling industrial facilities and flushing toilets. Previously, 35 tons of used wastewater were released from septic tanks into the ocean. However, the plant achieved zero wastewater by using activated carbon in the newly-developed device to filter the wastewater, remove odour and yellow tint, and returning the treated water to the industrial water receiving tank used for cooling facilities and flushing toilets. A series of patents are pending for the circulation system.
In the future, we will implement this circulation system at other plants located in Toyohashi City, with the aim of achieving zero wastewater in the entire Toyohashi area.