Sludge metagenome
To examine the impact of hydrochar and glucose on anaerobic phenol degradation and identify the optimal glucose concentration, 10 batch anaerobic experiments were conducted. The experiments were divided into two groups: one without hydrochar (R-A0 to R-A4) and one with 10g/L hydrochar added (R-B0 to R-B4), with each group subjected to the same glucose concentration gradient.