Food waste (FW) is an organic waste discharged from various
sources, e.g. households, cafeterias, restaurants. Nearly 1.3 billion
tons of food is lost or wasted throughout the food supply chain
[3]. Given its organic-rich nature, FW should be considered as a
useful resource for producing bioethanol. However, microorganisms
generally cannot directly assimilate the nutrients in FW
without proper pre-treatment. Therefore, different commercial
enzymes have been used to improve the saccharification of FW
[4], among which the pretreatment of FW with consortium of commercial
enzymes was found to be more efficient than that with a
single commercial enzyme in terms of glucose production.
Obviously, high-concentration of glucose favors the subsequent
bioethanol production. It should be realized that commercial