Nguyễn, T. P.; Nguyễn, X. C.; Trần, T. C. P.; Nguyễn, T. H. G.; Nguyễn , T. T. N. Evaluating Organic Matter Removal Efficiency in Pig Farm Wastewater After Biogas Tank Using a Two-Stage Filtration System With Biochar from Mimosa Pigra. hueuni-jns 2025, 134, 147-157.