Cavity pumps improve sludge conveyance in hessian wastewater treatment plant, Germany

July 12, 2016
NETZSCH Pumpen & Systeme GmbH has provided special pumps to the municipal works of a small town in South Hesse, Germany to convey thickened sludge with a high dry matter content without the risk of overpressure.

NETZSCH Pumpen & Systeme GmbH has provided special pumps to the municipal works of a small town in South Hesse, Germany to convey thickened sludge with a high dry matter content without the risk of overpressure. The company’s NEMO® BF progressing cavity pumps have been equipped additionally with a bridge breaker and lubricant injection to prevent accumulation of sludge. The Hessian wastewater plant was producing thickened sludge with a dry solids ratio of 25% to 27%, which could no longer flow but had to be transported through the plant. NETZSCH provided two special progressing cavity pumps that are capable of ensuring thickened sludge conveyance at a stable pressure and volume, regardless of viscosity. The progressing cavity pumps convey media with such a high dry matter content due to a conveyance principle, in which a rotor rotates in an oscillating motion within a fixed stator, resulting in conveying chambers being formed and media being transported from the inlet to the discharge side. The pump also has a horizontally positioned conveying screw around the coupling rod. https://pumps.netzsch.com/en/

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