Food grade products are given priority with a sustainable integrated corn based bio grind refining process. Premium fractions are fractionated for human foods and premium fermentable products. The balance food feedstocks are refined for animal feed with no loss of nutritional value. By-products of refining are used to produce ethanol and other energy products. There is no process waste. The integrated processes can be adapted to new continuous refineries or to optimize or retrofit one or more individual process steps.