HASAN, HAWRAA, zaidun Zaidun Naji Abudi, and Salam. “Effect of Different Biochars on Anaerobic Digestion of Organic Solid Waste- A Review”. Al-Rafidain Journal of Engineering Sciences 3, no. 2 (September 14, 2025): 290–301. Accessed October 15, 2025. https://rjes.iq/index.php/rjes/article/view/256.