Compost! It is dirty, it can be stinky, but really it can be an amazing part of the wine making process. Yes, we just said that. Remember composting can be a six- to ten-month process, depending on turning frequency, moisture, and temperature of piles. 

Cornell Waste Management Institute cwmi.css.cornell.edu - good classes and education 

Article from Walla Walla Community College

Compost calculation: ((Carbon Value A x Weight A) + (Carbon Value b x Weight B))/(Weight A + Weight B)