About Teta Vannrensing AS

Welcome to Teta Vannrensing AS – specialists in sustainable water treatment!

Teta Vannrensing AS solves water quality problems in a safe and efficient manner. We focus on water purification and leak detection. In addition to distributing our products and services, we also supply different projects related to research and development, both nationally and internationally.

Water treatment in a Nordic environment requires climate-proof solutions, and our coagulants have been able to demonstrate they are effective, resource-saving, robust and, economically advantageous solutions – that promote both sustainability and innovation.


Our Premium standard Kitoflokk™ Chitosan is our technical grade Chitosan for a wide range of industrial applications, where top purity and refined properties are not needed. Traditional application is water- and wastewater treatment, but it is shown that KitoFlokk™ is a good allrounder.

Within water treatment KitoFlokk™ works as a precipitant, generally causing more stability and control in water treatment plants. Using KitoFlokk™ instead of traditional precipitants will remove all metallic compounds from the drinking water, reduce mud production by 50 %, reduce CO2 emissions, energy and water consumption. The mud is now a biological product and can be used as soil fertilizer in agriculture. KitoFlokk™ is used in the same way as other precipitant, but in a more environmentally friendly way.

KitoFlokk is made of shrimp and crabshell, which brings the water treatment into the circular economy.

We also provide our zirconium based coagulant Aquator™. Used together with KitoFlokk™ you will achieve a strong application for water treatment, and achieving the benefits from the use of KitoFlokk™ when the water conditions requires extra treatment.

Please contact us to learn more! We are looking forward to helping you.

Wastewater treatment

Grease and odor in pumping stations and pipes is an increasing problem. By using our product Biokatalysator, we can both reduce fat and odor problems while reducing the amount of necessary “dirty” maintenance.

Satellite guided leak detection

As the first supplier in Scandinavia, we offer innovative leak detection by using satellites. The technology is the same as used to find water on Mars, while in our case it is used to find leaks of potable water. Leakage is detected in an efficient and sustainable way. This enables effective monitoring, planning, and risk minimization. Both large and small municipalities can benefit from the service. We provide the service as a Partner of Utilis Ltd. 


We have the knowledge and expertise that can help your business become more sustainable. Achieving Green Growth is about reducing footprints while creating economic benefits. The water industry has great potential in this shift. We see the whole value chain of our clients and can help create green competitiveness and sustainability in practice. Please contact us for more information, to see what we can achieve together.

Congratulation to Ekaterina Christensen

Congratulations to Ekaterina Christensen with completed and successful PhD within effective and sustainable water treatment with alternative coagulants.

Ekaterina Christensen has recently completed her dissertation in defense of her PhD in effective and sustainable water treatment with alternative coagulants. Ekaterina has studied the use of chitosan and zirconium in water treatment. On her dissertation day there was a prescribed topic for the test lecture “How to adapt Nordic drinking water treatment to a changing climate”.

The thesis shows that the coagulants can provide both economical and efficient water treatment. Use of chitosan in water treatment can reduce the amount of sludge, down to about a quarter. The use of zirconium may increase the amount of purified drinking water while reducing the use of polymer and energy through the handling of waste water in the process.

Teta Vannrensing is impressed by the work she has done, pointing out that her work can promote innovation and increased sustainability in the water industry. There are still many new and existing water treatment plants which use iron and aluminum as chemicals in their water treatment applications. At the same time alternative coagulants can contribute to large savings of resources in both the consumption of clean water, chemicals, energy, and the amount of sludge as a more sustainable alternative.

Teta Vannrensing can offer water treatment with chitosan and zirconium through its brands KitoFlokk and Aquator. Several of our customers choose Ekaterina Christensen as a consultant in water treatment with alternative coagulants.

Water treatment in a Nordic environment requires climate-proof solutions. The work Ekaterina has been able to demonstrate is effective, resource saving, robust, and economically advantageous – solutions that promote both sustainability and innovation.

We congratulate Ekaterina again!


See article on NMBU’s pages about the PhD;

Contact details Teta Vannrensing AS


Stine Bendigtsen, CEO
Mobile: + 47 909 39 398
Email: stine.bendigtsen@tetavannrensing.no


Caroline Gedde-Dahl, Head of Project and Business Development
Mobile: +47 930 88 355
Email: caroline.gedde-dahl@tetavannrensing.no