Hydrogen Photoproduction by Rhodopseudomonas palustris 42OL Cultured at High Irradiance under a Semicontinuous Regime

Table 2

Elemental biomass composition and heat of combustion of ash-free biomasses of R. palustris 42OL grown under SCR, at three different HRTs. The conversion efficiencies (η and η′) have been reported as well. Cells were harvested when the semisteady state condition was reached.

Ash-free biomass composition^*
		HRT (hours)
	360	225	138
C (%)	55.30±0.21	54.95±0.57	55.07±0.46
H (%)	8.52±0.11	8.45±0.29	8.51±0.15
N (%)	8.31±0.03	8.36±0.09	8.37±0.10
O (%)	27.87±0.49	28.24±0.31	28.05±0.22
−Δ𝑃B (Kcal g (dw)^−1)	6.330	6.268	6.301
η (%)	0.29	0.31	0.30
𝜂^ (%)	0.54	0.78	0.66

^*Analyses were performed in triplicate, mean values ± SD are reported.