Photoproduction of Hydrogen under Different Cultural Conditions by Alginate Immobilized Rhodopsedomonas palustris KU003

Table 1

Effect of carbon sources on hydrogen production (mL/15 mL vessel) by immobilized cells of Rps. palustris in anaerobic light.

Carbon source			Incubation period (in hrs)
	24	48	72	96	120	144	166	192
Fructose	0.26 ± 0.02	0.48 ± 0.10	0.98 ± 0.08	1.68 ± 0.06	1.86 ± 0.18	2.34 ± 0.28	1.22 ± 0.16	0.66 ± 0.08
Glucose	—	0.28 ± 0.06	0.48 ± 0.12	0.98 ± 0.20	1.54 ± 0.22	1.68 ± 0.12	1.14 ± 0.04	0.74 ± 0.28
Maltose	0.42 ± 0.04	0.64 ± 0.08	1.22 ± 0.26	1.88 ± 0.12	2.42 ± 0.06	2.88 ± 0.14	2.08 ± 0.18	1.48 ± 0.02
Sucrose	0.32 ± 0.14	0.54 ± 0.06	1.56 ± 0.14	1.94 ± 0.10	2.32 ± 0.24	2.56 ± 0.20	1.86 ± 0.14	0.66 ± 0.22
Mannitol	0.22 ± 0.16	0.76 ± 0.12	1.86 ± 0.20	4.2 ± 0.12	3.52 ± 0.16	3.1 ± 0.14	2.8 ± 0.22	1.78 ± 0.16
Lactate	0.24 ± 0.02	0.96 ± 0.08	1.64 ± 0.12	4.44 ± 0.56	6.14 ± 0.34	5.8 ± 0.22	3.88 ± 0.18	2.66 ± 0.12
Malate	1.86 ± 0.04	3.84 ± 0.06	4.68 ± 0.10	5.34 ± 0.12	6.72 ± 0.08	4.28 ± 0.24	2.78 ± 0.16	1.64 ± 0.28
Succinate	0.84 ± 0.14	1.44 ± 0.36	2.88 ± 0.04	3.78 ± 0.06	4.14 ± 0.12	4.56 ± 0.18	3.36 ± 0.06	2.54 ± 0.16
Lactose	0.42 ± 0.06	0.68 ± 0.16	1.12 ± 0.26	1.88 ± 0.34	2.62 ± 0.22	3.58 ± 0.28	2.24 ± 0.44	1.78 ± 0.38
Sorbitol	—	0.22 ± 0.06	0.44 ± 0.16	0.92 ± 0.24	1.48 ± 0.32	1.88 ± 0.28	1.24 ± 0.34	0.72 ± 0.28

—No hydrogen.