Your network of excellence in the gas and water industry

The DVGW supports the gas and water industry in all technical and scientific areas. The main focus of the Association’s work is on safety and hygiene as well as environmental and consumer protection. The DVGW elaborates technical rules designed to promote the technical self-management of the German gas and water industry, thus ensuring the safe and secure supply of gas and water according to the highest international standards. The Association, which was founded in 1859, currently has approximately 14,000 members. The DVGW is free from economic and political influences.

DVGW Research Center at Engler-Bunte-Institut of Karlsruhe Institute of Technology (KIT)
DVGW Research Center at Engler-Bunte-Institut of KIT
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Optical Coherence Tomography

Imaging methods for process optimisation

Water resources are a valuable asset. The research center is therefore constantly working on the optimisation of water treatment processes using multiscale imaging methods.

Optical coherence tomography on a test cell for membrane distillation.; © Annika Bauer / DVGW-EBI

The use of membrane based processes for (waste)water treatment (e.g. reverse osmosis, membrane distillation) are becoming increasingly widespread, although performance-limiting processes, such as scaling and (bio)fouling are not fully understood. As a result, we use comprehensive imaging methods, such as optical coherence tomography (OCT) to monitor the development of fouling. OCT is a non-invasive procedure and enables the in-situ analysis of the development of fouling during testing. Large areas of up to 16 mm x 16 mm are mapped in three dimensions in a short space of time (seconds to a few minutes). Fouling formation and structure are therefore digitally saved. OCT-data-sets are consequently analyzed to calculate parameters for process control and optimisation. This requires the use, adaptation and continued development of image evaluation routines.

One interesting area for OCT-monitoring correspond to the optimization of cleaning procedures. The starting time and duration of cleaning can be triggered by the fouling layer thickness and thus improving the efficiency of the cleaning as well as reducing the associated costs.

If you have any questions on imaging methods please contact
Dr. Florencia Saravia
Division Manager Water Chemistry and Water Technology

Phone+49 721 608-47894