[pageLogInLogOut]

#Research & Development

Sustainable, flexible, space-saving: Graywater treatment with 3d textiles

The demand for water in Germany is increasing and used water is not being utilized sufficiently. Graywater in particular, i.e. wastewater from showers, bathtubs and washbasins, offers great potential for further use. It can be brought to service water quality on site and reused for flushing toilets or watering gardens, for example. Thanks to flexible 3D textiles, it can even be used in almost any building to save space.
3D spacer fabric. Photo: ARIS/DITF
3D spacer fabric. Photo: ARIS/DITF


Around 50 to 80 percent of all domestic wastewater is graywater. Until now, large containers and tanks have been needed to reprocess it and return it to the cycle, taking up a lot of space in the building. The German Institutes of Textile and Fiber Research Denkendorf (DITF) and their project partner ARIS have developed a biological, textile-based system.

It is based on a 3D spacer fabric made of highly durable polypropylene. Its advantage is that it can be installed flat and is therefore extremely space-saving. Thanks to its special system geometry, it can be installed in places that would otherwise remain unused - for example in a new building under the floor of an underground garage, on a flat roof or in the garden. It can be modularly adapted to the water requirements and structural conditions in the respective buildings. "Even vertical solutions on facades are conceivable," explains DITF scientist Jamal Sarsour. This means that the graywater treatment system could be used in densely built-up cities in particular.

The system developed by the project partners requires little maintenance and is therefore particularly cost-effective. Compared to previous solutions, it is characterized by a long lifespan. It therefore contributes to sustainable water use and makes a valuable contribution to the circular economy.

Demonstrator in an apartment building in Berlin. Photo: ARIS/DITF
Demonstrator in an apartment building in Berlin. Photo: ARIS/DITF


ARIS plans to launch the new textile-based graywater treatment system on the market in 2024.

The project will be presented on June 13, 2024 at the SME Innovation Day of the Federal Ministry for Economic Affairs and Climate Protection in Berlin.

The research project with the number 16KN080829 of AiF Projekt GmbH, Berlin, was funded by the Federal Ministry of Economics and Climate Protection as part of the Central Innovation Program for SMEs (ZIM) on the basis of a resolution of the German Bundestag.

ARIS/DITF would like to thank the VDI/VDE project management organization for its support.






More News from Deutsche Institute für Textil- und Faserforschung Denkendorf

#Research & Development

More safety and comfort for protective clothing thanks to auxetic fabrics

When everyday materials are pulled, they stretch or elongate in the direction of the pull and become narrower in cross-section. We can also observe this property in two-dimensional textiles. Auxetic structures behave differently here. They have the striking property of not changing under tensile stress or even increasing their width or thickness. These properties are advantageous, for example, in protective textiles or textile filter media. The DITF are researching auxetic fabrics for various applications.

#Research & Development

Panty liners prevent bacterial vaginosis

Worldwide, almost one third of women of childbearing age suffer from bacterial vaginosis. This is when the sensitive microbiome of the vagina becomes unbalanced. Such a disorder of the vaginal flora can cause urogenital infections, abscesses on the ovaries or fallopian tubes or premature births. This significantly increases the risk of infertility in women and of contracting a sexually transmitted disease or HIV.

#Research & Development

DITF send a signal for climate protection

The German Institutes of Textile and Fiber Research Denkendorf (DITF) have successfully implemented extensive investments in photovoltaic systems at their site in Denkendorf. The systems installed on the roofs of the buildings and covered parking lots have a total installed capacity of 840 kilowatt peak (kWp). The DITF invested 1.6 million euros in this with the support of the state of Baden-Württemberg. The system was ceremonially put into operation on September 17, 2025.

#Research & Development

4.2 million Euros for research into textile recycling

Around the world, used textiles are still rarely recycled and pile up into huge mountains of waste. A recent study by the Boston Consulting Group (BCG) drew attention to this problem. However, the low recycling rate is also due to the fact that only a small percentage of used textiles are actually suitable for recycling into high-quality materials and for demanding applications. The German Institutes of Textile and Fiber Research Denkendorf (DITF) are addressing this problem with their research.

More News on Research & Development

#Research & Development

Kick-off for the Textile Production of the Future: Establishment of a Textile Technology and Development Centre in Mönchengladbach, Germany

The Institut für Textiltechnik (ITA) of RWTH Aachen University, together with its partners, is pleased to announce that it has received approval for its joint initiative, ‘Textile Factory 7.0’. The goal of the project is the establishment of a technology and development centre for the textile industry in Mönchengladbach.

#Research & Development

Bio-based fibers with good flame retardancy

Fibers made from bio-based plastics reduce dependence on fossil raw materials and promote the circular economy. The covalent bonding of flame-retardant additives can open the way for these fibers to enter the mass market.

#Research & Development

Exchange data between textile companies openly, securely and cost-effectively without a central platform – ITA makes it possible

The Institut für Textiltechnik (ITA) of RWTH Aachen University has launched a new demonstrator for an open and secure data space in the textile industry at the Digital Innovation Centre Europe (DICE). For the first time, the demonstrator shows directly and clearly how companies can share their data securely with each other without the need for a central platform. Data exchange is based on shared, freely usable technical foundations.

#Research & Development

Sustainable athletic wear made from bio-based Polyethylene

Conventional sports textiles made from petroleum-based synthetic fibres are to be replaced in the future by sustainable, bio-based, cooling textiles. Polyethylene, previously used mainly in the packaging industry, is thus qualified for use in textiles and, as a bio-based drop-in solution, offers a cost-effective, sustainable alternative for the future.

Latest News

#Functional Fabrics

“Action helps us change what we do!”

DAY 0 takes place deliberately before PERFORMANCE DAYS begins. It is conceived as a space for reflection, dialogue and active engagement — a moment to pause before the fair, rethink established systems and address sustainability not as a trend, but as a fundamental transformation challenge. Under the guiding metaphor “Turn the Tap Off”, DAY 0 focuses on root causes rather than symptoms, systemic change rather than isolated solutions, and collective responsibility rather than individual silos.

#Textiles & Apparel / Garment

Pets in fashion: functional and sustainable textiles find new market at Intertextile Apparel

China’s pet economy is booming, especially amongst younger generations, and pet apparel – from designer outfits to functional garments – was a RMB 3.5 billion (over USD 500 million) market in 2024, growing more than 20% annually¹. To help exhibitors harness this trend, Intertextile Shanghai Apparel Fabrics – Spring Edition 2026 will launch the Pet Boutique, presenting a range of innovative, sustainable materials that prioritise both functionality and comfort for pets.

#Sustainability

VAUDE eliminates PFAS from all products

PFAS (per- and polyfluoroalkyl substances) are now detectable worldwide – in drinking water, soil and the human body. These so-called “forever chemicals” are considered hazardous to health and potentially carcinogenic, as they do not break down and remain in the environment permanently. Despite these risks, PFAS are still used in a wide range of products. More than 15 years ago, VAUDE made a strategic decision to gradually eliminate PFAS from all product categories.

#Man-Made Fibers

Lenzing AG to become majority owner of TreeToTextile AB and accelerates industrialization of new fibers

The Lenzing Group is taking another strategic milestone by acquiring a controlling majority in the Swedish innovation company TreeToTextile AB. This step strengthens Lenzing’s position as a leading provider of sustainable, wood‑based specialty fibers and expands its innovation pipeline with a highly scalable, patent‑protected technology platform. The transaction is executed through the issuance of new shares.

TOP