The newsletter from TZW: DVGW-Technologiezentrum Wasser

Editorial

Dr. Josef Klinger

Dear colleagues,

The effects of climate change are currently the dominant topic, also for water supply companies. But which questions arise in concrete terms? Which measures need to be addressed in practice and which may not be, or not yet, a priority? One example is higher temperatures in the distribution network. The MiBiTemp project, funded by DVGW, is currently investigating the effects of higher temperatures on drinking water networks and water temperatures. A topic that concerns many water supply companies. We report on the first results.

Even though many changes and challenges are driving us, we are optimistic about the future and look forward to the personal exchange again. Against this background, I would like to point out that TZW’s Drinking Water Colloquium will finally take place again in Dresden on 16 May 2023 after a three-year break due to the pandemic. You can find more information on our website here.

Have an inspiring reading

Dr. Josef Klinger

Do higher temperatures become a problem for water distribution?

Within the last 20 years, climate change has increasingly led to record summers with extended hot weather periods. The warming of the soil can reach the distribution systems and, hence, causing temperature increase, whereby upper limits of drinking water temperatures of 25 °C are exceeded. The effects of this temperature increase on the microbiological drinking water quality are only incompletely understood and will be investigated in more detail within the project MibiTemp which is funded by the German Technical and Scientific Association for Gas and Water (DVGW).

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Aluminium release from granulated activated carbons

According to the German Drinking Water Ordinance (Trinkwasserverordnung), granulated activated carbons for drinking water treatment may only be used if specified purity requirements are met. The DIN standard for this includes, among other things, limit values for water-extractable trace metals. Aluminium is currently not regulated, but is increasingly in discussion. The DVGW research project AluCarbon has developed a database that enables an assessment of aluminium emissions.

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The conflict potential between drinking water supply and agricultural irrigation

For several years now, Germany has seen an increase in the cultivation of agricultural crops requiring irrigation. At the same time, a trend of increasing summer droughts has been observed. This combination leads to a rising demand for water for irrigation and, consequently, might result in an increasing competition for water between the public water supply and agriculture. The aim of this project, which was funded within the DVGW Innovation Programme Water, was to develop specific starting points and procedures for the management of conflicts occuring from the use of groundwater in regions with irrigation at the catchment level.

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News in brief from TZW

New research projects

Digital tools for sustainable asset management
The aim of this research project is to provide a structured overview of digital tools for asset management. The availability and dissemination of the products as well as already successful applications will be taken into account. More information about the project Digi Tools here 

Reuse of water for urban and agricultural irrigation
In order to improve the availability of water in times of climate change, the research project aims to develop options for the extraction, distribution and applications of reused water in a model region. More information and contact here 

Online technology for monitoring of drinking water treatment
The project is investigating the potential of online analytical methods for the automatic control of treatment processes and for microbiological monitoring. For this purpose, literature data and long-term experience from German water suppliers are being evaluated and the microbiological online methods flow cytometry and ATP measurement are being tested in practical use. More information and contact here 

New publications

Recently published TZW volume (in German):
> Water demand and peak consumption
Info and order (price 30 € each) via our website here

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TZW: DVGW-Technologiezentrum Wasser (German Water Centre)
Karlsruher Straße 84, D-76139 Karlsruhe, Germany
phone: +49 721 9678-0, e-Mail: info@tzw.de, www.tzw.de

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