In biogas plants, the microbiological process that produces the gas requires heat energy to operate, and in many EU plants there is also a separate heat-based pasteurization process. The heat required by the plant is typically generated by burning the biogas produced. It is therefore clear that the more heat that is recovered from the process and reused, the more biogas or energy produced from it remains for sale, i.e. the more energy efficient and profitable the biogas plant becomes.
At Biovoima, our starting point is that waste heat from biogas reactors, especially from hygienisation, is worth reusing. This is where our state-of-the-art technology for slurry heat exchangers comes in, which is primarily intended for for biogas plants and wastewater treatment plants.
Existing legislation requires that the raw material or digestate of a biogas plant using animal by-products in its production is pasteurized. The BIOpasteurizer system raises the temperature of the raw material or digestate in the biogas plant to 70°C for one hour, which ensures the destruction of harmful bacteria and thus ensures pasteurization. This pasteurization allows the final product to be used as fertiliser.
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