Table 1.

Comparison of electron yield obtained for hexanoate production between predicted results by the multi-species GEM and other co-culture/mixed culture. Electron yield is expressed by the amount of electrons going to hexanoate per total amount of electrons entering the system.

	Substrates a	Hexanoate b	Electron yield c
C. ljungdahlii & C. kluyveri[60]	CO = 31.9	0.48	0.07
	H2= 79.1
Mixed culture [61]	CO = 0.58	0.011	0.32
C. autoethanogenum & C. kluyveri[10]	CO = 4.8 d	0.15	0.26
	H2=5.3
C. autoethanogenum & C. kluyveri[10]	CO = 6.5 d	0.15	0.15
	AC = 2.5
Multi-species GEM (this study)	CO = 4.8	0.59	0.6
	H2=3.87
	SUCC = 1

^aVolumetric consumption rate mmol l⁻¹ h⁻¹

^bVolumetric production rate mmol l⁻¹ h⁻¹

^chexanaote e⁻/total e⁻ in; CO = 2 e⁻ per mol, H₂ = 2 e⁻ per mol; AC(acetate)= 8 e⁻ per mol; SUCC (succinate)= 14 e⁻ per mol and hexanoate  = 32 e⁻ per mol

^dAssuming 90$\%$ gas consumption