Sep 18, 2012, updated September 2012
As an outcome of using the RISE tool (Response-Inducing Sustainability Evaluation) to evaluate milk farms, there have been some recommendations to support sustainable farming. One of these is the implementation of bio-digesters, to produce energy in the form of biogas.
Bio-digesters have been installed in 28 milk farms. They use cow manure to generate biogas and bio-fertilizers in order to reduce the negative impact on the environment due to the generation of large quantities of methane gas and nitrogen into the soil.
By 2012 there were:
- 11 bio-digesters at Torreón milk district
- 8 bio-digesters at Lagos district
- 7 bio-digesters at the Querétaro milk district
- 2 bio-digesters at Coatepec milk district
With all of these, up to 161,181 m3 of biogas are generated on a daily basis, of which 96,708 m3 is methane gas, which is used for electric energy generation or it is burned out to avoid pollution of the atmosphere.
Value to Society
ALTERNATIVE ENERGY:Bio-digesters have been installed in 28 milk-farms.
Suppliers have reduced their energy costs, as well as costs related to the purchase of chemical fertilizers, avoiding methane gas emissions into the atmosphere. Also there are additional benefits to the community as insects and diseases created by the accumulation of manure are decreased.
Value to Nestlé
Up to 45% of the milk that Nestlé buys comes from the 28 milk farms with bio-digesters using cow manure to generate energy and bio-fertilizers.
By 2015 we aim to have 176 bio-digesters installed, and to collect 54% of our milk supply from dairy farms using this kind of equipment for generating energy.