"At Growing Power it becomes worm food. We collect
over 20,000 lbs. of brewery waste from Lakefront Brewery every week
for compost or 1.4 million tons of waste annually."
20,000 lbs a week is 10 tons, or 520 tons a year according to old math. To be fair, I suspect some enthusiastic humanities student was writing the blurb (look at all those "o" sounds), and had a mind lapse when setting down the units of measure).