WE GENERATE RENEWABLE ENERGY WITH A BIODIGESTER
We developed at our free stalls a production model where cows manure is used to generate electric energy with a biodigester. Additionally, the effluents of the biodigester return to the field as biofertilizers for crops and forage, which will be the feed for cows. It is an efficient and sustainable model.
The biogas plant started operations towards the end of 2017. Such plant generated more than 22.800 MWh of renewable energy. During this first two years we already processed more than 100,800 tons of manure from the cows of our free stalls.
How does the biodigester work?
Manure is separated from sand through a sedimentation process and goes to a solid concentrator and separator in order to reduce the amount of water.
This semi-liquid effluent is the source that feeds the biodigester tanks. Through the generation of a proper environment for the development of bacteria, the organic matter is digested by methanogenic bacteria.
Methane is captured and used to generate electricity. The generator set has an installed capacity of 1.4 MW and the resulting energy is delivered to the local grid.
The waste derived from this process return to the field as biofertilizers with less organic load.
What biofertilizers do?
In the plots where we apply biofertilizers we managed to reduce by 24% the use of chemical fertilizers. In this way, we protect the carbon present in our soil and we reduce greenhouse gas emissions and odor.
In 2019 we obtained the biodigester ISO 14001:2015 certification.
Besides, we have been granted the biodigester registration under the Verified Carbon Standard international certification. This enables us to issue carbon credits for 10 years with an option to renew for 20 more years.
Our medium term plan is to have two biodigesters with a total capacity of 3.4 MW.