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Table 1 Characterization of raw BSG, raw PM, and BSG/PM hydrolysates

Content (g · kg ⁻¹ )	Raw BSG	Raw PM	BSG hydrolysates	PM hydrolysates
Dry matter	199	301	74	58
Organic dry matter	191	233	63	40
Ash	9	78	12	19
Protein	57	48	N.A.	7
Lipids	15	8	N.D.	N.D.
Lignin	29	88	N.D.	N.D.
Total carbohydrates^a	84	67	15	2
Monomeric glucose	N.D.^b	N.D.	4.59	0.87
Monomeric xylose	N.D.	N.D.	6.95	0.85
Monomeric arabinose	N.D.	N.D.	3.30	0.56
COD	108	N.A.^c	100	41
TN	9.15	N.A.	3.54	2.77
Organic nitrogen	N.A.	N.A.	N.A.	1.17
Ammonia-N	0.05	5.00	0.24	1.60
Phosphorus	1.18	N.A.	0.48	0.82
Sulfur	0.59	N.A.	0.27	0.71
Sodium	0.02	N.A.	4.93	3.70
Chloride	0.01	N.A.	2.70	N.A.
Calcium	0.66	N.A.	0.18	2.23
Magnesium	0.36	N.A.	0.12	1.18
Potassium	0.06	N.A.	0.04	1.09

^aCarbohydrates in raw BSG and raw PM are mainly polysaccharides and so no glucose, xylose, and arabinose monomers were detectable in this study despite of the fact that these sugars were present as building blocks in the polysaccharides. It is clear that all carbohydrates in the hydrolysates of BSG and PM were monosaccharides after degradation. ^bNot detectable. ^cData not available. BSG, brewers’ spent grain; PM, pig manure.

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