Dose-Dependent Effects of Coconut Shell Biochar on Biogas Yield and Inhibitor Reduction in Dairy Manure Anaerobic Digestion Systems Lukas Kano Mangalla, Jenny Delly, Agustinus Lolok, Prinob Aksar Dinamika : Jurnal Ilmiah Teknik Mesin Vol. 16 No. 2 2025 DOI 10.55679/djitm.v16i2.17