For a world with clean water. Wastewater aeration and mixing- Wastewater treatment plants for commercial and domestic applica ... tions. Package plants for houses. The ATB WATER GmbH, based in Porta Westfalica, was founded in 1999 by the Baumann family. We are concerned almost exclusively with the development/production and the marketing of biological wastewater treatment plants and small-scale wastewater treatment plants as well as associated peripheries (aeration, mixing, decanting, spare parts shop, maintenance, laboratory service). read more