There's a lot of money to be made from waste, especially starch residue found in the form of cocoa shells, husks, beet-pulp, bagasse (pulp from sugarcane), and argol (a by-product of grape fermentation).
In fact, the US starch residue industry is the largest in the world and accounts for more than half the global market share, generating America $2.9 billion in 2020 exports.
The different starches all have their own individual uses: beet pulp is used for cow feed, for example, while bagasse (pictured) is used as a biofuel and building material. Argol is commonly used in dyeing and in fertilizers.