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Fig. 2 | Biotechnology for Biofuels

Fig. 2

From: Highly efficient methane generation from untreated microalgae biomass

Fig. 2

Biogas and methane productivity via anaerobic fermentation of algal biomass in continuous mode. The biogas productivity was monitored online and methane content was measured weekly (left = replete-N BM, right = low-N BM). Organic loading rate (OLR) is indicated by shades of gray in the background, thereby following biomass concentrations were applied: OLR1 = 1 g VS L−1 day−1, OLR2 = 2 g VS L−1 day−1, OLR4 = 4 g VS L−1 day−1. Error bars represent mean productivity of previous 7 days (SE, n = 7). N nitrogen, BM biomass, VS volatile solids

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