Mixed silage of Elodea and wheat straw as a substrate for energy production in anaerobic digestion plants

Table 4 Estimated model parameters of the utilized two-pool kinetic model (according to model C in Brule et al. [13])

	Data	S	α	k _F	k _L	R ²	S^a	α ^a	R ^2a
	(mL g⁻¹ VS)	(mL g^− 1 VS)	(−)	(d^− 1)	(d^− 1)	(−)	(mL g^− 1 VS)	(−)	(−)
ESC1	206	260	0.70	0.1263	0.0120	1.00	220	0.19	1.00
ESC2	166	161	0.50	0.1508	0.1506	0.99	180	0.30	0.98
ESG1	228	231	0.46	0.1095	0.1094	1.00	252	0.12	0.99
ESG2	224	275	0.73	0.1707	0.0113	1.00	238	0.40	1.00
EN	219	218	0.59	1.0899	0.1315	1.00	213	0.97	0.94

^aOptimized values (curve fitting) for fixed parameter values of k_F = 0.3393 (d⁻¹) and k_L = 0.0780 (d⁻¹), respectively. Fixed first-order reaction constants were calculated as the mean value of the individual kinetic parameters (k_F and k_L) over all experiments
Data final experimental value of the discontinuous digestion test (according to VDI 4630 [12]), S estimated total methane potential (at infinite retention time), α ratio of rapidly degradable substrate to total degradable substrate, k_F first-order reaction constant for rapidly degradable substrate components, k_L first-order reaction constant for slowly degradable substrate components, R² coefficient of determination