Circular Economy Approach: Cultivating Grey Oyster Mushroom using Cassava (Manihot esculenta) Peel Waste from Starch ProductionNgoc-Han T. Huynh, Le Duc Trung, Nguyen Phung Loc, Do Vinh Duong and Thanh TranE3S Web of Conf., 405 (2023) 01009DOI: https://doi.org/10.1051/e3sconf/202340501009