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

Table 2 Chemical characteristics, pH, and products of silage fermentation of Elodea silages without and with addition of WS

Silage	TS (%)	VS (% TS)	LA (%TS)	AA¹ (%TS)	BA² (%TS)	pH
EN	6.7 ± 0.1	63.5 ± 1.0	0.0^b	7.5^a	2.1^a	6.5^a
ESC1	25.9 ± 0.9	90.0 ± 0.5	0.5^{a, b}	4.4^b	0.0^b	5.4^c
ESC2	49.9 ± 0.2	90.7 ± 0.4	1.1^{a, b}	1.5^c	0.0^b	5.8^b
ESG1	25.7 ± 0.3	81.4 ± 0.9	0.0^b	3.0^{b, c}	0.0^b	5.6^b
ESG2	56.7 ± 0.8	92.0 ± 0.6	1.9^a	1.8^c	0.0^b	4.9^d
S.E. (n = 3)			1.04	2.54	1.16	0.55
Pz			*	n.s.	n.s.	**
Pz × Sb			*	n.s.	n.s.	**
Moisture content			***	n.s.	n.s.	**
EN biomass			n.s.	***	**	***
WS			*	n.s.	n.s.	**

Different superscript letters in the same column indicate significant difference at p < 0.05
TS total solid, VS volatile solid, LA lactic acid, Pz straw particle size effect, Pz × Sb interaction particle size × substrate, EN E. nuttallii biomass effect, WS wheat straw biomass effect, n.s. not significant
*p < 0.05, **p < 0.01, ***p < 0.001
¹AA acetic acid—sum of acetic acid and propionic acid
²BA butyric acid—sum of isobutyric, n-butyric, isovaleric, n-valeric, and n-caproic acid

ISSN: 2192-0567