Many modern municipal wastewater treatment systems are based on combined sewer systems, where rainwater and domestic wastewater are collected. Especially in case of high water arise like during extreme storm water condition, it is necessary to intercept this water into a receiving stream to protect the wastewater treatment plant against overloading. The easiest and most cost-efficient solution are retention basins at the pre-clarifier, placed in front of the real wastewater treatment plant.
Coarse solids can be discharged into pre-clarifier in the form of suspended or floating matter during the relief process. To prevent this, relief structures are equipped with baffles to retain floating matter and solid matter. However, conventional fixed baffles are not able to fully serve this purpose.
The floating scum baffle type SWTW of BIOGEST® AG is used for targeted retention of solids on relief thresholds in separating / discharge structures of combined sewage systems.
SoLid retention of floating matters at stormwater overflows and cso outlets