2022 Review - Amsterdam

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IACA Coin Awards 2022

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An important factor in the coin blank production is the quality of the water used in the different processes. Water with very low conductivity is used to prevent forming of stains on the blanks. However, there is a continuous pollution with process chemicals and abrasion from the coin blank surface preventing the water to be reused or drained into the public sewage system. This results in expensive chemical-physical recycling or high disposal costs.
A solution which combines sustainability, low operating costs and process safety is the vacuum distillation. Pure water is separated due to different boiling points from pollutants such as salts, heavy metals and oils. The distillate can be recycled back into the process, creating a zero liquid discharge production.
The successful implementation of such a system will be presented in a relevant case study.