Thermo pressure hydrolysis
Microbial stress in the biogas reactor can result in decreasing biogas exploitation. It appears by the use of hardly degradable and cellulose and lignin rich substrates. For this reason the straw from solid dung isn’t well degradable. The thermo pressure hydrolysis substitutes this microbial decrease and breaks the macro molecules into monomers useable for other micro organisms in the biogas production chain.
Pre-treatment, high process temperatures and high pressure replace the comparatively slow biochemical conversion of the enzymatic hydrolysis. In the context of „EU-Agro-Biogas“ project funded by EU (http://www.eu-agrobiogas.net), extensive laboratory experiments for the processing of cow manure were carried out by thermo pressure hydrolysis. Within the trial period was i. e. shown that a processing temperature of 160°C increased the methane exploitation by 57 %. Moreover, the thermo baric treatment contributes to an essential diminishment of the viscosity of the litter manure. As a consequence of the thermo baric treatment potential application problems with technical components of the biogas plants such as pumps or the mixer can be avoided, and the tendency to scum formation is reduced.
Contact: Jörn Budde
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