BELGAS® biogas scrubber

Untreated biogas contains high levels of sulphides. Desulphurization of biogas will increase life duration of combustion engines while reducing running costs.

Waterleau’s proprietary BELGAS® scrubber technology is a low CAPEX and OPEX desulphurization technology for (bio)gas treatment.


The BELGAS® scrubber uses activated sludge from biological wastewater treatment as a washing medium, omitting chemicals and avoiding costs for both water and chemicals.


  • pH neutral values
  • No H2SO4 accumulation
  • No corrosion, no scaling
  • No slurry production
  • Compact footprint
  • No chemicals required
  • Low OPEX and CAPEX
  • Proven design: more than 50 references
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