Efficient production of methane from artificial garbage waste by a cylindrical bioelectrochemical reactor containing carbon fiber textiles

AMB Express

Table 2 16S rRNA gene copy numbers of prokaryotes and methanogens in the suspended fraction (OLRs of 13.4, 33.5, 38.0, 53.6, and 67.0 g-CODcr · L⁻¹ · day⁻¹ ) and retained fraction on the CFT (OLR of 67.0 g-CODcr · L⁻¹ · day⁻¹ ) of the BER + CFT

OLR (g-CODcr · L ⁻¹ · day ⁻¹)	Prokaryotes (copies · reactor ⁻¹)	Methanogens (copies · reactor ⁻¹)	Ratio of methanogens ^a(%)
Suspended fraction
13.4	(9.6 ± 0.4) × 10¹²	(2.3 ± 0.3) × 10¹²	24.2 ± 4.0
33.5	(8.7 ± 0.8) × 10¹²	(2.6 ± 0.1) × 10¹²	29.6 ± 3.7
38.0	(1.3 ± 0.1) × 10¹³	(4.0 ± 0.5) × 10¹²	31.2 ± 6.7
53.6	(1.2 ± 0.2) × 10¹³	(3.2 ± 0.2) × 10¹²	27.1 ± 6.7
67.0	(1.5 ± 0.1) × 10¹³	(4.7 ± 0.1) × 10¹²	31.2 ± 2.1
Retained fraction
67.0	(3.4 ± 0.5) × 10¹²	(1.8 ± 0.1) × 10¹²	52.3 ± 9.6

^aProportion of 16S rRNA gene copy number of methanogens to that of prokaryotes.