Manure Manager

Features Anaerobic Digestion Applications Business/Policy Dairy Energy Energy Production Environment Sustainability United States
A dairy making sure manure isn’t wasted

December 17, 2012  by Dan Stone National Geographic Magazine

December 17, 2012 – It takes a lot of energy to produce milk. Albert Straus would know. He owns and runs the Straus Family Dairy and a nearby creamery in Tomales Bay, just north of San Francisco, CA.

Every day, each of his 300 cows produce 120 pounds of manure. Considering that dung contains lots of methane, Straus decided several years ago that he’d tap the waste for its full potential. He built a methane digester on his farm. When he showed it to us, the digester looked simply like a bubbling pond enclosed by a large tarp. But the gas inside serves up 960 kilowatt hours of electricity each day, enough to power Straus’s entire dairy. And his electric car. READ MORE


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