ATB Umwelttechnologien GmbH, established in 1999, is engaged in the development, production and sale of small biological sewage treatment plants and small scale sewage treatment plants for the purification of domestic and industrial wastewater as well as peripheral products and performances including service.

Company details

Südstraße 2 , Porta Westfalica , D-32457 Germany

More Office Locations Locations Served


Business Type:
Industry Type:
Water and Wastewater - Water Treatment
Market Focus:
Globally (various continents)
Year Founded:

ATB Headquarter at Porta Westfalica, Germany

In the sector of small waste water treatment plants ATB Umwelttechnologien GmbH Germany is one of the leading companies in Germany and Europe; worldwide about 60,000 plants have been sold so far. This success was possible as the plants distributed under the brand AQUAmax® operated as the first small plants with the SBR (sequence batch reactor) technology, have superior purification performances even when eliminating the nitrogen and finally the plant was offered in a consequently expandable kit / modular system. Besides ATB attaches big importance to training and service of the partners.

Since 2002 a systematically foreign business is practised. The focus here is Europe, but also beyond Europe there are numerous activities. At present there are 4 subsidiaries in Belgium, France, Ireland and Romania. In other target countries the distribution is carried out by local partners, who are connected with ATB to sales agreements.

About 15 years ago three members of the small firm 'Abwassertechnik Baumann' (Baumann Wastewater Engineering), all of them members of the Baumann family, were deliberating how they could make the lives of installation partners and of the operators of small wastewater treatment plants easier – both economically and technically. Rapidly, the idea of developing a sewage treatment plant, which can be installed without great expenditure as retrofit unit both in old and also new multichamber pits, was born. And: the cost/performance ratio had to be more than fair.

With the help of familar specialists and engineers as well as with some borrowed money Markus Baumann and his father, Dipl.-Ing. Dagobert Baumann, developed the concept for a new generation of wastewater treatment plants. The basis for this was provided by a technology, which had already achieved outstanding results in large scale wastewater treatment operation and which was able to balance out heavy variations in loading: the SBR process. 

The first prototype was created in the cellar...

Based on this, the first prototype of the new sewage treatment plant was created in the cellar of the Baumann family house. The first units were assembled and tested in the garden pond, rebuilt and tested... and one day, after many long nights and weekends in the cellar, the AQUAmax® was finally finished. Now it was possible to retrofit antiquated wastewater treatment plants with a modern system without extensive excavation work and to install new wastewater treatment plants without great expenditure. 

Pioneer work...

As the SBR technology, which was used in the AQUAmax® plant, was not yet described in any valid DIN standard specification, the Baumann's in collaboration with the RWTH (Rhine-Westphalian Technical University) in Aachen, had to do pioneer work. The AQUAmax® has been tested thoroughly until it was finally granted: The German 'National General Technical Approval' No. Z-55.3-53 in accordance with DIN 4261. The way towards one of the most fascinating success stories in the branch was thus free.

The AQUAmax® SBR wastewater treatment plant system from ATB – today one of the most modern and innovative technologies of our time. Always one step ahead...

Our latest development, PUROO®, once again sets milestones in the world of the wastewater plant sector. With very low power consumption and totally without troublesome solenoid valves, PUROO® is another big step in the improvement of small wastewater treatment plants. In May 2014 PUROO® was the winner of the GreenTec Awards category 'Water & Wastewater', Europe's biggest environmental and economic prize.