However ERY and ST at 400 mg L1 caused a 74.5% and 57.6% inhibition to specific
sulfidogenic activity (SSA) when the sludge granules were disrupted and ethanol used as substrate. After
disruption, microbial tolerance to antimicrobials decreased, but the rate at which MPA utilized acetate
and ethanol increased from 0.95 gCOD(gVSSd)1 to 1.45 gCOD(gVSSd)1 and 0.90 gCOD(gVSSd)1 to
1.15 gCOD(gVSSd)1 respectively. The ethanol utilization rate for SRB also increased after disruption
from 0.35 gCOD(gVSSd)1 to 0.46 gCOD(gVSSd)1.