Table 1.
Basic properties of the co-composting raw materials.
Fig 1.
Changes in tannin and saponin contents during composting of C. oleifera shell and seed cake.
Table 2.
Contents of typical phenolic acids in the compost samples of C. oleifera shell and seed cake at different composting time-points.
Table 3.
Contents of typical saponins in compost samples of C. oleifera shell and seed cake at different composting time-points.
Table 4.
Chemical names of typical phenolic acid compounds in the compost samples (of C. oleifera shell and seed cake) and their respective chemical formulas.
Table 5.
Chemical names of typical saponins in compost samples (of C. oleifera shell and seed cake) and their respective chemical formulas.
Fig 2.
Relationships between the tannin and saponin contents and the TN, TP, TK, and total nutrient contents.
TN: total nitrogen, TP: total phosphorus, TK: total potassium.
Fig 3.
Relationships between the tannin and saponin contents and NO3--N and NH4+-N.
Table 6.
Spearman correlations among physical and chemical parameters during composting of C. oleifera shell and seed cake.
Fig 4.
Relationships between tannin and saponin contents and the C/N ratio.
Fig 5.
Relationships between tannin and saponin contents and the GI.
Table 7.
Solvita maturity index during the composting of C. oleifera shell and seed cake.
Table 8.
Correlations of tannin and saponin contents with the C/N ratio, GI, and Solvita maturity index during composting of C. oleifera shell and seed cake.