Assessment of extraneous water inflow in separated sewer networks

C. Karpf & P. Krebs
Separate sewer systems provide due to the separate transport and treatment of waste water and rain water an efficient sewerage technology. But the advantage compared to combined system technology gets lost if the input of extraneous water exceeds the capacity of the system. Especially the input of rainwater into the waste water pipes depending on the drained area is responsible for an overload of the sewer system and the wastewater treatment plant (WWTP). In the...
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