Performance Analysis and Microbial Community Evolution of In Situ Biological Biogas Upgrading with Increasing H₂/CO₂ Ratio

Table 2

Chemical characterization () of inoculum and sludge mixture used.

Parameters	Sludge mixture	Inoculum
Total solids (TS) (gTS∙kgFM^-1)^(a)
Volatile solids (VS) (gVS∙kgFM^-1)
VS/TS (%)	70
CODtot (gCOD∙kgFM^-1)	12	5.5
TVFA (mgCOD∙L^-1)		224
Alkalinity (mgCaCO3∙L^-1)

^(a)FM: fresh matter.