Research and Development
The PhoWa research group investigates photonic processes for water treatment and reuse. Key areas include AOP processes and novel sanitation systems.
Research Focus Areas
The Institute for Sustainable Water Systems at Hof University (inwa) focuses on applied research and development in the key areas of sponge cities, photonics, food production, as well as knowledge transfer, sustainability, and digitalization. The PhoWa research group works on photonic processes for water treatment.
Thematically and across various projects, all research groups actively unite in the sponge city/region research focus. AOP processes, water reuse, and novel sanitation systems enable sustainable solutions for water management.

The expansion of modern laboratories and testing facilities is steadily increasing. With the completion of the new ZWE (Centre for Water and Energy) building in 2025, the research groups 'Photonics and Water' and 'Resource-Efficient Food Production in Integrated Aquaculture' will move into the new laboratories. The research group 'Water Infrastructure and Digitalization', strongly oriented towards real water/wastewater operations, will also expand the existing number of testing facilities at various locations such as the Hof wastewater treatment plant. Working close to customers and subjects, the research group 'Sustainability and Project Management in Water Management' operates on-site, at the university and in social media, offering knowledge-based and methodological solution developments.
Research activities are strongly linked with teaching. This is reflected on one hand in the integration of research content into various lectures held by all research group leaders in both bachelor's and master's programs. On the other hand, numerous engineering students complete project and internship phases in the individual research groups or work there as student assistants. Additional individual topics from research activities are increasingly becoming the content of bachelor's and master's theses. In the area of scientific research work, the professors of the research groups additionally offer the possibility of doctoral studies, either in cooperation with partner companies or in the future within the framework of the doctoral center of Hof University.

In addition to knowledge transfer to future workers through teaching, inwa focuses on transferring research results into practice. Here, municipalities are primarily addressed, which are actively involved in research projects to transfer innovative solutions to practice through 'living examples'. The focus is not only on the implementation of technology, but especially on involving the employees on-site to achieve a high implementation transfer.
For knowledge and implementation transfer specifically in the area of sponge city/region, the new Competence and Transfer Centre for sustainable sponge city/region at inwa was founded in November 2023.

From left: David Höltgen, District Administrator Dr. Oliver Bär, LfU Vice-President Dr. Richard Fackler, Prof. Dr. Manuela Wimmer, Prof. Günter Müller-Czygan, Thomas Lang, Mayor Eva Döhla, Prof. Dr. Dr. h.c. Jürgen Lehmann
Research Groups
Research Groups and Focus Areas

Photonics and Water (PhoWa)
AOP processes, water reuse, photonic processes, novel sanitation systems.
AOP Verfahren
Wasserwiederverwendung
Photonische Verfahren
Neuartige Sanitärsysteme
Projects
More Research Projects
Serious research happens here.
Research Stations
ResearchLabs
inwa maintains several research stations available for experiments planned in research projects, but also as demonstration objects for municipalities or companies. Furthermore, the ResearchLabs can be used in teaching for laboratory experiments.
KanaBEnt
Wastewater sewer networks are often designed as combined systems that collect wastewater from households, businesses, and industry together with stormwater and direct it to the treatment plant. During heavy rainfall, additional storage basins can become overloaded, leading to discharge of untreated mixed water into surface waters. To minimize pollution, screen systems are installed to retain coarse impurities.
The KanaBEnt container investigates whether intelligent control of the screen system can use the filter cake for better purification of the mixed water, especially for small particle sizes.
A replicated sewer section with a screen system and intelligent control enables testing of water quality and flow. This allows the sewer network volume to be better used for storage and the discharge of mixed water to be reduced.


Schwammsta(d)tion
To plan or better understand a sponge city, broad knowledge of the complex relationships of the water cycle is needed. We want to illustrate these relationships in our Schwammsta(d)tion and make them tangible through experiments. The basis is a system representing the complete water cycle, which we will expand with various sponge city elements. Interested parties of all backgrounds can understand the effects by adjusting various parameters and making changes to the cycle. We want to convey the understanding and necessity of sponge city elements to our students, continuing education participants, and other groups in the region.
Currently, the basic system is ready for use, allowing us to map the complete water cycle and simulate changes. The next step will integrate additional elements to align the station with sponge city possibilities. Small scenarios will also be developed for group use. This equipment was selected with the help of ADIRO, which continues to provide technical and methodological support. More information about ADIRO at www.adiro.com.
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