Preparation and Extraction of Pectin from Robusta Coffee (Coffea canephora) Peel Waste as a Sustainable Agriculture BiomassRana Labiba Azzahra, Prieskarinda Lestari, Devi Yuni Susanti, Nathania Clara Dione, Annisa Marsa Chairani and Anggitaniko Shiba Dhiyaul RBIO Web Conf., 165 (2025) 09001DOI: https://doi.org/10.1051/bioconf/202516509001