Iglsø Agro & Biogas was originally built for an annual biomass amount of 150,000 tons, but after an expansion, it is now expected to handle 219,000 tons a year.

Because there was a need to save space, the plant has been equipped with tall reactors, which reduce the space requirements by about 50% compared to concrete tanks in an biogas plant. The tall reactor tanks also provide the advantage that stirring of the biomass becomes easier, and the costs for stirring are lower than in a plant with concrete tanks.