Heavy rain often brings with it large amounts of dirty water. The consequence: The capacity of the waste water treatment plant is exceeded, the cleaning process impaired. However steps need to be taken to prevent rainwater from flowing uncontrolled into the recipient capacity as stipulated in the Water Resources Act and Waste Water Act because otherwise this would severely soil natural waters and drinking water.
Store first, then clean
Therefore Rainwater tanks store additional volumes of rain and dirt loads. The downstream waste water treatment plant than assumes the cleaning at a later stage. It is important that these systems are maintenance-free because Rainwater tanks are not always located on the waste water treatment plant. Round rainwater tanks from SBB are located in the main tank, in the by-pass tank, as collection, overflow and through-flow tanks. Self-cleaning, of-course. Economically, constructively and hydraulically optimised. Rainwater tanks are available as ATV retention or overflow tanks or sedimentation systems.