A large part of our environmental impact comes from our wastewater, mainly with organic oxygen-consuming substances and phosphorus. The wastewater goes to our own wastewater treatment plant in Ingvallsbenning where it is purified by a membrane bioreactor before it reaches a lake. Our work focuses on constantly reducing this burden, mainly by reducing wastage in production. This may be possible due to changes in work procedures and staff education.
Oppigårds care about the local food production, therefore we can proudly say that a large proportion of our byproducts from our production is used as animal feed for farmers in the region. Spent grains consisting of malt residues from mashing, becomes food for dairy cows, whereas the yeast, hops and hot brake (a protein precipitate from the brewing process) becomes prime pig food.
- about 20 tons of spent grain a week
- perfect feed for cows
- yeast and beer
- contains enough proteins to cover the dayily intake.
To boil our wort, we use a propane burner, gas is a fossil fuel and contribute to global warming through emissions of carbon dioxide. Propane gas is chosen because of its relatively high energy value, its purity in comparison with other fossil fuels such as oil or coal, and since it is easy to transport. The limited availability of electricity has also contributed to our choice of energy for the burner. In the future, we aim to go over to a more sustainable option such as DME or biogas, since the logistics of these options are not currently developed in our region, we have to settle with propane gas for now.
We are also running our own waste water treatment plant. All waste water go thorugh the proscess and get cleaned to drinking level.