@cameralibre @TeamVarambon I think the fair response is “that depends”… since biowaste is not homogenous and there are different types of biowaste a kg of it will always have a different energy value. Therefor it is really crucial for you to be aware of which types of biowaste you are talking about.
Here may be a good link which may be able to serve as orientation for your challenge. It gives an overview into different types of biowaste and their energy values:
http://teeic.indianaffairs.gov/er/biomass/restech/uses/howmuch/index.htm