Life Cycle Analysis for Hibiscus Sabdariffa Powder Manufactured by Freeze Drying for Wastewater ApplicationWoo Chieh Zheng, Nurhazwani Ismail, Christine Olga Boboi and Chua Bee LinMATEC Web Conf., 335 (2021) 01002DOI: https://doi.org/10.1051/matecconf/202133501002