Sludge Flow Measurement in Recirculation Line

Wastewater Treatment Plant - Sludge Treatment


  • Pipe with 0.4 m diameter, made of stainless steel
  • Fully filled
  • High pollution load, up to 1 % dry solids


Definition of tasks

  • Failsafe and stable measurement of the return sludge conveyed using screw pump lifting equipment in the horizontal line downstream of the transfer chamber
  • Both existing measurements (EMF + clamp-on) did not work reliably or did not work at all due to high pollution and gas loads
  • Low installation expenses


  • The flow measurement system Type NFP has been used.
  • Upstream of the non-functioning EMF a hole has been drilled and a nozzle has been welded onto the existing pipeline. Subsequently a ball valve for sensor removal under process conditions has been installed and the sensor has been adjusted and fixed.


  • Easy, simple and quick upgrading of existing facilities
  • Old measuring devices did not necessarily need to be removed
  • Reliable measurement despite high dry solid contents

Used products

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