Table 2.

Production H₂ and CH₄ yields from Chlorella vulgaris and Dunaliella tertiolecta biomass after 49 days of incubation

	mmol xa per l	mmol xa per g volatile solids	mmol xa per g added CODtot	mmol xa per g removed CODtot
CH4
C. vulgaris and U-C	59.6	11.9	5.8	11.3
C. vulgaris and B-C	0	0	0	0
D. tertiolecta and U-D	5.1	1.0	2.1	3.6
D. tertiolecta and B-D	0	0	0	0
H2
C. vulgaris and no inoculum	2.3	0.45	0.23	1.7
C. vulgaris, BESA and no inoculum	1.6	0.33	0.15	-b
D. tertiolecta and no inoculum	2.6	0.52	1.6	21.1
D. tertiolecta, BESA and no inoculum	1.7	0.35	0.42	4.0

^aWhere x is CH₄ or H₂, as indicated.^bH₂ yield per g removed COD_tot could not be calculated as no COD_tot reduction was detected.

BESA = 2-bromoethanesulfonic acid; COD_tot = total chemical oxygen demand.