Table 2.

Product yields of glycerol fermentation, calculated relatively to the amount of glycerol consumed (mmol mmol⁻¹), by T. brockii subsp. finnii (DSM 3389^T) and T. wiegelii (DSM 10319^T), when incubated in pure culture or in co‐culture with methanogens.

Culture	Acetate	Lactate	Ethanol	H2	Methane
T. brockii	0.50 ± 0.05	0.18 ± 0.01	0.20 ± 0.04	0.25 ± 0.02	n.a.
T. brockii + M. sp. GH	1.00 ± 0.04	n.d.	n.d.	n.d.	0.63 ± 0.02
T. brockii + M. mar	1.00 ± 0.00	n.d.	n.d.	n.d.	0.82 ± 0.01
T. wiegelli	0.46 ± 0.06	0.15 ± 0.05	0.15 ± 0.04	0.24 ± 0.04	n.a.
T. wiegelli + M. sp. GH	1.00 ± 0.04	n.d.	n.d.	n.d.	0.63 ± 0.03
T. wiegelli + M. mar	1.00 ± 0.04	n.d.	n.d.	n.d.	0.75 ± 0.03

M. sp. GH, culture obtained after 15 transfers of the enriched culture Col‐Gly with H₂/CO₂; M. mar, Methanothermobacter marburgensis DSM 2133^T; n.a., not applicable. n.d., not determined.