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VERSION:2.0
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 5
SUMMARY:Desalination of wastewater to ensure fresh water supply
DESCRIPTION:In Germany, 85% of the total non-public water supply of 14 billion m³ (2019) is used in the area of plant and product cooling. Due to climate change, a continuous limitation of water withdrawal and wastewater discharge quantities in combination with increasing temporary or permanent water shortage can be observed, which can lead to a potentially negative impact on production or plant availability, especially in cooling and casting processes. Strongly varying cooling water and concentrate compositions (salts, hardening agents) as well as certain ingredients (e.g. organics) prevent the closing of the cycles or recycling. Innovative and easy-to-use desalination processes such as membrane-based capacitive deionization are available but have not yet been adapted to the requirements of the iron and steel industry with regard to the complex water matrix. As a result, there is a need for solutions to deal with these temporary situations by using wastewater as an alternative water source to ensure the water supply and developing suitable process approaches for producing mono concentrates from the desalination concentrate as a prerequisite for material recycling.
For this purpose, the use of membrane-based capacitive deionization, which has already been successfully tested in the field of cooling water treatment, is considered in more detail. The focus of the current BFI work is the treatment of organic and solid-containing wastewaters from chemical-physical treatment plants or biological treatment plants for the treatment of degreasing baths and old emulsions as well as a  for a central treatment plant before discharge. Another focus is the determination of potential impurities and their removal to ensure reliable and energy-efficient process technology for wastewater desalination. At the same time, the production of mono-concentrates from the resulting mixed concentrates for the electrochemical production of a chlorine-based biocide for direct use in cooling circuits is being investigated.

CLASS:PUBLIC
DTSTART:20230615T143000
DTEND:20230615T145000
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