Table 3.

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

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

Values are means ± SDs (n = 3)

MW1 municipal wastewater effluent sample 1, MW2 municipal wastewater effluent sample 2, SW swine wastewater effluent