Hogs love it, and it can be used as a plant food for those plants that need a more acidic food, such as black and blueberries. Also, it can be used to make sauerkraut, pickles and a variety of other food products.
From a Greek yogurt manufacturer:
At Chobani, we are committed to being a good community partner. That includes finding responsible uses for whey, a natural byproduct of the process to create authentic strained Greek Yogurt. We are constantly exploring the best ideas and options for beneficial whey use.
Right now, we choose to return whey to farmers, most of whom use it as a supplement to their livestock feed. Some is used as a land-applied fertilizer but only at farms that have nutrient management plans in place with the state environmental conservation agency. A small percentage is also sent to community digesters, where the whey is used to produce energy.
Make whey powder from it for milk shakes.