The Challenge

There are thousands of old overflows in sewer networks. When it rains, this is how considerable quantities of pollution, like sanitary articles, paper and synthetics, reach our waters. Old overflows are often at the performance limit of today’s design, which is why reconstruction through extending the overflow crest is often necessary when installing standard screens. If the narrow space cannot be corrected or the flow rate is not sufficient, then expensive new build CSO’s and SSO’s are necessary.

Range of Application

• before combined water inflows into receiving waters
• before storm water inflows into receiving waters
• before soil filter systems
• before earth and retention basins
• before percolationsbefore difficult-to-clean basins

Advantages

• Robust stainless steel construction
• modular in construction
• hydraulic drive
• space-saving curved screen
• high flow rate
• can be retrofitted, also possible through small hatch openings
• high cleaning efficiency
• safe transport of screenings
• wiper elements on the pollution-protected side
• screenings released to right and left of curved screen
• velocity between the screen bars limited to  ≤ 1,4 m/s
• head loss ≤10 cm
• high specific performance approx. 500  l · s-1 · m-2 due to curved surface
• no readjustment necessary