Welcome to 

Granit Technologies and Engineering (GRT) SA

engineering and contractor

Making use of proprietary "state of the art" technologies, we help our customers to process liquid and solid wastes, while preserving the environment and the human health.

Granit Technologies and Engineering (GRT) SA
Rue des Ducats 40 B
CH-1350 Orbe, Switzerland

Phone +41 (0)21 318 75 10
Fax +41 (0)21 318 75 11

Wet Oxidation of municipal waste water treatment plant sludge: Orbe, Switzerland

  • Processing of non biodegradable organic sludge from the waste water treatment plant of the Swiss city of Orbe (15’000 equivalent inhabitants)

General view of Orbe Wet Oxidation installation built by GT&E
High Pressure pump
  • Processing of up to 500 t/year of solids.
  • Fully automatic installation operating continuously (24 hours /7 days) with one operator.
  • Elimination of 80% of the organics during the oxidation process and digestion of the remaining organics for methane production.
  • Separation by press filters of the mineral residue for discharge deposit.
  • Granit Technologies has delivered:

o   Initial laboratory tests for the full characterization of the process

o   Full engineering and construction of the installation, with sludge preparation, Wet Oxidation process, gas cleaning process, residue processing.

o   Operation and maintenance of the installation