Simultaneous Biohydrogen and Bioethanol Production from Anaerobic Fermentation with Immobilized Sludge

Table 2

Performance of H₂ and ethanol production rate as well as energy generation rate with CSTR operated at different OLR using molasses as the carbon source.

OLR; (kg/m^3·d)	COD; (mg/L)	H2 production rate; (mmol/h·l)	EtOH production rate; (mmol/h·l)	Energy generation rate^a; (kJ/h·l)
8	2000	5.76	4.23	7.42
16	4000	7.68	6.04	10.44
24	6000	10.74	11.72	19.08

^aEnergy generation rate = H₂ production rate (mol/hL) × 286 kJ/mol H₂ + EtOH production rate (mol/hL) × 1366 kJ/mol EtOH.