Case study: Maabjerg Bioenergy

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Courtesy of Biogasclean A/S

Substrate: Animal manure and food waste
Biogas flow: 3.600 Nm3/h
H2S Inlet: 3.000 ppm
H2S Outlet: 80 ppm
Year of installation: 2012

The Maabjerg plant is a collaboration between agriculture, municipalities and the district heat station and is situated in the northern part of Denmark. When in full operation, it will transform up to 650.000 tons of biomass based mainly on manure and food waste into energy per year and convert 50.000 tons of Co2. It will yearly produce 17,8 million cubic meters (m3/y) of biogas.

The plant consists of six reactors receiving biomass from a large geographic area and the end product, the bio energy, is transformed into heating for 5,388 homes and power for 14,381 homes.

The biological cleaning of the large amount of gas demands three FRP-tanks full of sulphur devouring bacteria delivered by BioGasclean. With the help of a small amount of oxygen the bacteria oxidize the H2S to sulphate which dissolves in the scrubber liquid and is washed out.

After desulphurization the gas is ready to be put into use for electricity and heating and the residual wet and dry fraction of the fermented slurry from the biogas production is transformed into fertilizer.

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