3 ms·
I am guessing because there's a lot more to growing and processing algae. What the article is talking about is just moving some of the spent grain to the water
by OnACoffeeBreak 7y ago
I am guessing because there's a lot more to growing and processing algae. What the article is talking about is just moving some of the spent grain to the water treatment plant.
Local farmers already partner with breweries to use some of the spent grain as cattle feed adjunct. I don't know whether spent grain is viable as fertilizer.
Another reason might be that most breweries are likely hesitant to introduce another microorganism in vast quantities into the brewery--especially if that microorganism feeds on the same stuff as yeast does--to avoid contamination of their main product: beer.
- mrob 7y agoAlgae gets its energy by photosynthesis, so it needs light to grow. Beer (bittered with natural hops) must be kept away from light to avoid producing unpleasant tasting compounds: https://en.wikipedia.org/wiki/Beer_bottle#Lightstruck_beer https://en.wikipedia.org/wiki/Beer_bottle#Lightstruck_beer
- plopz 7y ago> In some cases, such as Miller High Life, a hop extract that does not have isohumulones is used to bitter the beer so it cannot be "lightstruck" Seems like that's solvable.
- mrob 7y agoI don't think many microbreweries would be in favor of that. Miller High Life isn't exactly renowned for its great hop flavor.