Preparation and Characterization of Pectin-based Biopolymer from Combination of Coffee and Cocoa Husks as Agroindustrial Waste UtilizationPutra Alfiansyah, Guntara Very Pradika, Ridwansyah Micko Perdhana, Mumtaz Hatta Niha’i Sipayung, Wahyu Duwi Santoso and Prieskarinda LestariBIO Web Conf., 165 (2025) 09002DOI: https://doi.org/10.1051/bioconf/202516509002