Bear Republic explains how its solar system works

Bear Republic is in the upper echelon of craft breweries with sustainability commitments. To just run through a few things real quick: Flow meters and a plant-wide data collection make more efficient use of water (3.5 to 3.75 gallons of water to brew one gallon of beer). They have an anaerobic digester that cleans the brewery’s wastewater and generates biogas. Spent hops are strained and utilized as a soil amendment; spent brewer’s grain ends up as livestock feed.
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Source: Real Beer

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