Biogasclean supplies a full range of biological H2S removal systems

We have developed two different technologiesbiotrickling and MBR – and offer five different types of gas cleaners so it is possible to choose the best solution for your project. The gas cleaners can be designed to handle any flow and H2S content in the raw biogas and can be installed at greenfield projects or refurbishment of existing plants. Typically the H2S is reduced to 50-250 ppm but Biogasclean can reduce to other values if required.

Biotrickling – How it works

In a biotrickling filter the biogas is forced through one or more process tanks with a packing material. The microbes grow on the surface of the packing material forming a biofilm. The H2S in the biogas is transferred from the gas phase into the biofilm, where is used as energy source by the bacteria which oxidize H2S to sulfate and elemental sulfur.

The bacteria are aerobic; they require oxygen. Therefore, atmospheric air is injected into the raw biogas or the CO2 stream at the inlet to the process tank. The scrubber liquid is trickling down the packing material and provides moisture and nutrients for the bacteria. The temperature in the process tank is kept between 30 to 50°C (86 to 122°F). The effluent from the process is a liquid fertilizer which is discharged into the outflow from the anaerobic digester.

MBR – How it works

MBR – Moving Bed Reactor – is Biogasclean’s groundbreaking and patented technology for cleaning biogas with a high sulfur content. The MBR technology is especially developed for biogas generated on waste waters with high organic loads such as ethanol distilleries. The MBR has a very compact design and only requires 25-30% tank volume compared to biotrickling.

After compression, cooling and air injection the raw biogas with H2S is bubbled through one or more process tanks with liquid containing the moving MBR media. The MBR system is fully automated and is simple to operate and maintain, including cleaning of packing media.

Biogasclean MBR

Key features

There are four key features that are common for all our solutions:

  1. Safety
  2. Automatic and reliable operation
  3. Low operating costs
  4. Guaranteed performance

We look forward to meeting you

Please contact us if you need an efficient solution for desulfurization of biogas. We can help you for any biogas flow and H2S load and no matter if your project is greenfield or refurbishment of an existing plant. We will be happy to share our experience with you. Together, we will find the optimal solution for your biogas plant.


Thorkil Dahlgreen
Founder of Biogasclean

Peter Thygesen
CTO and COO Biogasclean

Jesper Hørlyk-Jensen
Head of Sales Europe &
North America

Ho Vooi Toc
Sales Manager South
East Asia