Co-hydrothermal carbonization of biopolymer and biomass wastes: Sustainable valorization into solid fuel and thermal filler - Jung-Hun Kim; Zambaga Otgonbayar; Thu-Huong Le; Juwon Kang; Seungmook Jung; Jaewon Cha; Suk Jekal; Jiwon Kim; Hyungseok Nam; Chang-Min Yoon; Doyeon Lee (Journal of Environmental Management, 2026)