Translations

Water at TOYOTA ONNAING

4. Environment

Biodiversity and sustainable resource management

Sector Industry

Year 2014

Country France

Transmitter

Context

Yaris production site in Onnaing (59-France) is considering environment preservation as a major strategic development axis. In production terms, this involves saving natural resources and reducing the activities’ impact on the environment.TMMF production site consumes water mainly for steel parts surface treatment pools, for paint application on the car’s body and plastic parts, and in cooling circuits. The site is equipped with a complete waste water treatment station.

Objectives

- Become autonomous from the public distribution system in the supply of water for industrial needs

- Collect and use rainwater

APPROACH

FROM PUMP TO DISCHARGE: RIVER QUALITY
All raw water delivered on site is pre-treated in the plant’s waste water treatment station through reverse osmosis. This sends mineral elements (calcium, magnesium) to the treatment station. Our analytical laboratory operates the daily monitoring of:
- 28 parameters in the water before discharge
- 16 parameters in the water after physico-chemical treatment

All water discharged by the plant into the Escaut river is in conformity with the criteria defiined to improve the Escaut river water quality.

HOW DID TOYOTA TAKE UP THE WATER CHALLENGE
The surface treatment line in TMMF paint shop is shorter than the industry average. Thus rinsing flowrates are roughly twice smaller than imposed by regulation. Since start of production, consumptions have been reduced through optimising dumping and cleaning operations of surface treatment pools.

RECYCLING DISCHARGE WATER
Since 2006, TMMF is recycling effluents from its water treatment station and re-using 40% of this recycled water for manufacturing processes.

NEW STEP IN WATER MANAGEMENT
In 2008, TMMF built a 6209sqm rainwater collection tank. After collection and storage in a holding tank, rainwater is then fetched and treated in the station before being injected into the water system for production purposes. This rainwater tank allows TMMF to save 37% on industrial water from the public system. From the conclusive experience, a second 10,385sqm tank was built in August 2012. With a total 16,594sqm rainwater collected TMMF is aiming at becoming fully autonomous from the public system in industrial water supply.

Best Practice selected in 2010 by Réseau Alliances and updated in 2012 for its evolution.

CONTRIBUTION TO COMPANY PERFORMANCE

Reduce industrial water costs

Benefits

Reduce water consumption by 70% per vehicle