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

Table 3

Summary of reactors’ gas mass flow (CO₂, CH₄, and H₂) during the experimental periods.

Period–H2/CO2	CO2 (NmL∙d^-1)		CH4 (NmL∙d^-1)		H2 (NmL∙d^-1)
	R1	R2	R1	R2	R1	R2
I	788	894	2597	2772	0	0
II-0.5	955	1054	2813	3137	27	33
III–1	962	1034	2985	3319	42	28
IV–2	953	1094	3161	3612	43	38
V–3	1004	1307	3628	4404	54	65
VI–4	605	1147	3454	4542	203	349
VII–6	575	864	3597	4329	134	229
VIII–7	297	440	3353	4970	235	348