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Table 2 Overview of mean biogas and methane productivities for the low-N and replete-N reactors

From: Highly efficient methane generation from untreated microalgae biomass

  Specific biogas productivity Specific methane productivity
(mLN g−1 VS day−1) (mLN g−1 VS day−1)
Replete-N BM Low-N BM Maize silage Replete-N BM Low-N BM Maize silage
OLR 2 g VS L−1 day−1 634 ± 15 761 ± 12 740a 416 ± 11 464 ± 9 404a
OLR 4 g VS L−1 day−1 203 ± 50 750 ± 15 620a 131 ± 33 462 ± 9 339a
  1. The values were summarized by distinct OLR-phases (OLR 2 = 2 g VS L−1 day−1, OLR 4 = 4 g VS L−1 day−1). Maize silage productivities were included for comparison as predominantly used renewable substrate for industrial scale fermentation. Error bars represent standard error (SE, n = 8)
  2. N nitrogen, VS volatile solids
  3. aLiterature values for maize silage [41]