New module to double gas production from cattle manure


Zollikofen BE/Grangeneuve FR – An additional module for biogas plants is to double the production of gas from cattle manure. The prototype of the module was developed by the School of Agricultural, Forestry and Food Sciences and is now being tested at the Grangeneuve school farm.

A team from the School of Agricultural, Forest and Food Sciences(BFH-HAFL) has developed a module that can double the production of biogas from cattle manure. The cattle slurry is thermally pretreated in this module. This will make it even more accessible to the bacteria that produce the biogas, according to a statement from the Bern University of Applied Sciences (BFH).

The prototype of the module is being tested at the biogas plant on the Grangeneuve school farm. The biogas plant was officially inaugurated on May 4 by Fribourg State Council President Didier Castella and State Councillor Jean-François Steiert, according to a separate statement from the canton of Fribourg. The biogas plant is operated with slurry and manure from dairy and pig farms, as well as whey and waste from school gardens. First results of the tests with the module are expected for the end of the year.

“By developing technologies to achieve a higher biogas yield, we are helping to make the large, previously untapped potential of farmyard manure in Switzerland usable for energy,” Michael Studer is quoted as saying in the BFH release. “This helps avoid greenhouse gas emissions from the storage of farmyard manure,” says the BFH-HAFL Agricultural, Forestry & Energy Technology lecturer.

The biogas plant complements already existing photovoltaic systems. Together, the systems are expected to generate 650,000 kilowatt hours, covering more than 40 percent of the school farm’s energy needs. ce/stk