To give two examples, the Group has used the cascade cleaning system for washing processes for years. This system is a type of multilevel waterfall which significantly reduces the quantity of fresh water used. The Group has also focused on reusing treated process water. In addition, cooling lubricants are prepared using ultrafiltration. Modernized cooling water systems also increase efficiency.
, too, is part of reducing consumption. ZF remanufactures around the world on a large scale. Remanufacturing means that products are restored to working condition on an industrial scale. The European Automobile Manufacturers' Association (ACEA) estimates that the remanufacturing of a component uses up to
90 percent less water
than if it were manufactured from scratch.
Using measures like these, the Group reduced its water consumption by 497,000 cubic meters in 2016, compared to the previous year. This amount of water could supply a city of 60,000 people like Friedrichshafen for two months. However, reductions like these can't be achieved year after year – in 2017, water consumption rose again for the first time after years of reductions in the quantity of water used. For ZF, this is an incentive to conduct thorough analyses into why this figure has risen and to push even harder on conservation efforts.