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Table 3 Quantification of bacterial 16S rRNA genes in initial effluent and 7-day cultures

From: Growth promotion of three microalgae, Chlamydomonas reinhardtii, Chlorella vulgaris and Euglena gracilis, by in situ indigenous bacteria in wastewater effluent

Effluent sample 16S rRNA gene copy numbers (copies/mL), and their ratios in initial effluent and in 7-day cultures
Initial After cultivation with indicated microalgal species
Chlamydomonas reinhardtii Chlorella vulgaris Euglena gracilis
MW1 effluent 4.2 ± 1.1 × 108 9.2 ± 2.5 × 1010 6.2 ± 3.6 × 1010 7.4 ± 1.7 × 1010
 7-day culture/initial ratio   219 148 176
MW2 effluent 2.2 ± 0.9 × 108 7.2 ± 2.9 × 1010 4.7 ± 1.9 × 1010 2.4 ± 1.1 × 1010
 7-day culture/initial ratio   327 214 109
SW effluent 8.7 ± 3.3 × 109 6.9 ± 5.2 × 1012 6.5 ± 3.1 × 1012 2.9 ± 1.5 × 1012
 7-day culture/initial ratio   793 747 333
  1. Values are means ± SDs (n = 3)
  2. MW1 municipal wastewater effluent sample 1, MW2 municipal wastewater effluent sample 2, SW swine wastewater effluent