Is it possible to chemically treat grass to make it digestible? Is it possible to chemically treat grass after "harvesting" it to make it digestible by humans?  I know we can "eat" grass, but we can't break it down in our stomachs. If there is some chemical treatment to partially break grass down into something we can digest, I see it possibly being used to end world hunger!  I know we already treat bone to make it into gelatin, and I am wondering if something similar can be done for grass.
The indigestible component of grasses is cellulose, which is polymerized glucose.

Yes, it is possible to hydrolyze the cellulose to glucose, which is of course digestible.  

The hydrolysis can be catalyzed enzymatically with a cellulase, or using acid hydrolysis.  

The process of hydrolyzing cellulose is often discussed in the context of so called cellulosic ethanol, as the glucose is then fermented to ethanol subsequent to hydrolysis.