Paques B.V.

- Ammonia Removal

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'Cost-effective, sustainable removal of ammonium from effluents and ammonia from waste gas'. The ANAMMOX® process is a cost-effective and sustainable way of removing ammonium from effluents and ammonia from waste gas. Compared to conventional nitrification/denitrification savings on operational costs can reach up to 60%, while CO2 emission is reduced.

The ANAMMOX® conversion is an elegant shortcut in the natural nitrogen cycle. Anammox bacteria convert ammonium (NH4+) and nitrite (NO2-) into nitrogen gas. Paques developed the process for commercial purposes in cooperation with Delft University of Technology and the University of Nijmegen. Since the first full-scale plant started up in 2002, many other ANAMMOX® plants were implemented worldwide.

The ANAMMOX® process can be used for the removal of ammonium from nitrogen rich effluents, which for example can be found in:

  • Municipal waste water treatment (sludge rejection water)
  • Organic solid waste treatment (landfills, composting, digestion)
  • Food industries
  • Manure processing industry
  • Fertiliser industry
  • (Petro) chemical industry
  • Metallurgical industry
  • Semi-conductor industry

The ANAMMOX® process is a very cost-effective and sustainable way of removing ammonium from effluents. Compared to conventional nitrification/ denitrification savings on operational costs can reach up to 60%, while CO2 emission is reduced.

The ANAMMOX® conversion is an elegant shortcut in the natural nitrogen cycle. Anammox bacteria convert ammonium (NH4 +) and nitrite (NO2 -) into nitrogen gas. Paques developed the process for commercial purposes in cooperation with Delft University of Technology and the University of Nijmegen. Since the first full-scale plant started up in 2002 (treatment of the rejection water of a sludge digestion of a municipal WWTP), many other ANAMMOX® plants were implemented.

  • Proven technology, > 10 years operational experience
  • > 20 ANAMMOX® references worldwide
  • Small footprint
  • Robust system, handling high loading variations
  • Saving on operational costs up to 60%
  • Savings on excess sludge production
  • Easy process control in one single continuously operated reactor unit
  • No addition of organic carbon source (methanol) required

The Anammox® reactor is a reactor system in which nitritation and anammox conversion occur simultaneously in one single process unit.

The natural nitrogen cycle involves various biological processes. Nitritation is the process where ammonium is oxidised to nitrite and nitrification is the process in which ammonium is fully oxidised to nitrate. Denitrification is the process which converts nitrate with addition of an organic carbon source to nitrogen gas. Anammox (anaerobic ammonium oxidation) conversion is an elegant short-cut in the natural nitrogen cycle where ammonium and nitrite are converted to nitrogen gas.

As the anammox process involves removal of ammonium over nitrite (NO2 -) rather than nitrate (NO3 -) less oxygen (O2) is required.

The ANAMMOX® process can be used for the removal of ammonium from nitrogen rich effluents.

These effluents are found in:

  • Municipal waste water treatment (sludge rejection water)
  • Organic solid waste treatment (landfills, composting, digestion)
  • Food industries
  • Manure processing industry
  • Fertiliser industry
  • (Petro) chemical industry
  • Metallurgical industry
  • Semi-conductor industry

In 2012, a pilot project has been started with ANAMMOX® bacteria functioning at a lower temperature. This process is more energy efficient, needs fewer chemicals and can be applied at temperatures between 6 and 16 degrees C. After a successful lab scale performance, the pilot should demonstrate the possibilities on a larger scale. The CENIRELTA pilot is a EU LIFE+ project in cooperation with Waterboard Hollandse Delta, Paques, STOWA and Delft University of Technology.

  1. Ammonia-rich influent
  2. Aerators for mixing and ammonia removal process
  3. ANAMMOX® separator for biomass retention
  4. Effluent exits the reactor

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