Climate Cast

Craft beer grew in popularity over the past decade across Minnesota, but the brewing process has also created a ton of wastewater. Now, there’s an experiment to make the process carbon neutral. University of Minnesota professor Paige Novak and Fulton Brewing are working on a new, sustainable way to treat wastewater from the brewing process.She spoke to MPR chief meteorologist Paul Huttner for Climate Cast.The transcript below has been lightly edited for clarity and length.Tell us about the craft brewing process and how it contributes to carbon emissions.When beer is brewed, a whole lot of extra wastewater is produced. For every pint of beer that’s made, there's usually four to 10 pints of wastewater that’s generated at the same time. This wastewater tends to go to a centralized treatment facility where it’s treated, then cleaned up and discharged to a river. What happens during that wastewater cleanup process is that a lot of energy is used to pump air into the water, bacteria eat up all the waste, and all th