SUPPORT-HOTLINE: +49-611-188-300-19

Combined Sewer with a New Reach Learncard 478112173


Question

Description: There are 19,500 inhabitants living in a municipality. The wastewater generated is conveyed through a combined sewer. A reach of this combined sewer located in a short distance upstream of the sewage treatment plant is rehabilitated with following features:


Circular profile: DN 1,000

Length: 800 m

Height difference: 10 m


The screw pump lifting station at the treatment plant has a dry weather inflow of 48 l/s.


What is the flow in m3/s in this new reach, when the flow velocity is 1.7 m/s?

Answer

Q = v/A


1 m2 · π/4 · 1.7  m/s = 1.33 m3/s



This learn card is part of a learn card package and can be ordered in our shop together with the reward-winning Brainyoo app for iOS, Android and Blackberry.