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

AMB Express

Table 1 Reactor performances in thermophilic BER + CFT and previous reactors treating garbage waste under the maximum OLR conditions

	Treating waste	OLR (g-CODcr · L ⁻¹ · day ⁻¹)	HRT (days)	CODcr removal ratio (%)	VTS removal ratio (%)	SS removal ratio (%)	VSS removal ratio (%)	Gas production rate ^a(L · L ⁻¹ · day ⁻¹)	Methane content (%)	CODcr recovery ^b(%)	References
Cylindrical BER + CFT	10% AGS	89.3	1.5	62.5	-	52.5	50.9	16.5 ± 3.4	56.8	83.9	In this study
Cylindrical BER + CFT	10% AGS	53.6	2.5	67.0 ± 3.5	-	56.6 ± 5.3	51.7 ± 4.9	12.1 ± 1.5	58.2 ± 1.7	117.1 ± 13.9	In this study
Packed-bed reactor	1.5% AGS + 1.0% milled paper	53.6	0.9	67.0	-	-	67.0	11.4	60.0	56.2	Ueno et al. (2007)
Small-scale BER + CFT (−0.8 V)	10% AGS + 0.08% ground rice straw	27.8	4.4	58.0 ± 4.9	-	38.9 ± 1.9	-	7.9 ± 0.7	55.0 ± 3.2	86.5 ± 2.6	Sasaki et al. (2011b)
CFSTR	10% artificial kitchen waste	20.4	11.0	89.0		-	-	-	-	82.0	Park et al. (2008)
UAF reactor	Synthetic garbage + swine manure	17.6	9.2	-	78.0	-	-	8.7	50.0	-	Liu et al. (2009)
CFSTR	2% AGS	6.25	4.0	65.8 ± 2.8	-	61.8 ± 5.6	-	1.8 ± 0.1	80.0	-	Sasaki et al. (2011c)

^aMean values under standard temperature and pressure at these OLRs are shown.
^bCODcr recovery = [(CODcr of the fermentation broth) + (CODcr of CH₄)] / Influent CODcr.
VTS: volatile total solid, SS: suspended solid, VSS: volatile suspended solid, UAF reactor: upflow anaerobic filter reactor, CFSTR: continuously flow-stirred tank reactor, AGS: artificial garbage slurry (dog food slurry).