How to recycle olive oil manufacturing wastes? The fact that only 20% of the olive used to make olive oil becomes olive oil and the other 80% is spread between hard wastes and liquid water wastes  made me want to ask this question. Isn't there a way to recycle the other 80% and use it in an effective way either in other industries (energy, agriculture, or cosmetics)?

I'd like to know if there is a simple and low-cost way people can do so.
The components of the 80% waste material could definitely be recycled using common procedures ( eg distillation, solvent extraction ) and could be used for many purposes like you mentioned or by converting the waste material to a more useful product. 

I'm not sure what they make from the waste from olive oil production exactly but a good example of similar biotechnology is the use of waste cooking oils to synthesize biodiesel.