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Table 1 Characteristics of PPRs, inoculum, and soil

From: Using the properties of soil to speed up the start-up process, enhance process stability, and improve the methane content and yield of solid-state anaerobic digestion of alkaline-pretreated poplar processing residues

Parameter PPRs Inoculum Soil
TS (%) 83.6 ± 0.0 20.1 ± 0.1 83.3 ± 0.0
VS (%) 89.8 ± 0.3 58.3 ± 0.2 3.8 ± 0.0
TC (%) 45.9 ± 0.1 29.8 ± 0.1 2.6 ± 0.1
TN (%) 0.2 ± 0.0 1.9 ± 0.1 0.06 ± 0.0
H (%) 5.6 ± 0.2 4.0 ± 0.1 0.4 ± 0.0
pH 7.7 ± 0.0 7.3 ± 0.0 6.9 ± 0.0
Cellulose (%) 55.3 ± 0.3 39.0 ± 0.8 ND
Hemicellulose (%) 26.1 ± 0.7 27.1 ± 0.7 ND
Lignin (%) 24.3 ± 1.4 ND ND
  1. TS: total solids; VS: volatile solids; TC: total carbon; TN: total nitrogen; H: hydrogen.
  2. ND: not determined.