Semi-continuous anaerobic digestion of mixed wastewater sludge with biochar addition

This work analysed the effects of Biochar (BC) addition to Anaerobic digestion (AD) wastewater Mixed sludge (MS) in semi-continuous mode. A 3 L digester was operated at 37 °C for 100 days, feeding MS collected every three weeks same treatment plant, and 10 g L−1 BC. The average performance (biogas 188 NmL d−1, 68% methane) improved presence BC 244 69% methane). According results multiple linear regression analysis performed on experimental data, 79% variation soluble COD driving factor 38% increase biogas methane yields. In conclusion, considered conditions, variability substrate’s composition key performances AD MS, independently