Energy Potential of Urban Tree Pruning Waste

Débora Pagliuso; Camila Prado Cenciani de Souza; Aline Gloria Felix; Rose Mary Garcia Skelton Celidonio; Liliane Id; Alexandre Luiz Cavalcanti Valdez; Adriana Grandis; Edgard Bastos de Freitas Back Silva; Pamela Cezar Oliveira; Aline A. Cavalari

doi:10.48044/jauf.2025.008

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Figure 1.
Starch levels of pruning tree wastes at different composting times. Data represented by mean ± SE (n = 5). The letters show significant differences according to the ANOVA one-way followed by Tukey’s tests (P ≤ 0.05). The samples were composted for 0, 2, 12, 16, 28, and 32 weeks.
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Figure 2.
Cellulose levels of pruning tree wastes at different composting times. Data represented by mean ± SE (n = 5) of the sulfuric acid hydrolysis. Different letters represent statistical differences between the composting times of a given sugar by ANOVA one-way and Tukey’s tests (P ≤ 0.05). The samples were composted for 0, 2, 12, 16, 28, and 32 weeks.
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Figure 3.
Lignin levels of pruning tree wastes at different composting times. Data represented by mean ± SE (n = 5). Letters in the graph represent the significant differences in ANOVA one-way and Tukey’s tests (P ≤ 0.05). The samples were composted for 0, 2, 12, 16, 28, and 32 weeks.
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Figure 4.
Saccharification capacity of the cell walls of pruning tree wastes. Data represented by mean ± SE (n = 5). Letters in the graph represent the significant differences in ANOVA one-way and Tukey’s tests (P ≤ 0.05). The samples were composted for 0, 2, 12, 16, 28, and 32 weeks.

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Table 1.

Structural carbohydrates composition of pruning tree wastes. Data presented as mean ± SE (n = 5). Different letters represent statistical differences between the composting times of a given sugar by ANOVA one-way and Tukey’s tests ( P ≤ 0.05). The samples were composted for 0, 2, 12, 16, 28, and 32 weeks. SE (Standard Error); DW (dry weight).

μg monosaccharide mg DW⁻¹
Composting time	Fucose	Arabinose	Galactose	Rhamnose	Glucose	Xylose	Mannose
0 weeks	5.06 ± 0.07 ^a	13.87 ± 0.96 ^c	14.33 ± 0.52 ^c	7.04 ± 0.14 ^ab	8.19 ± 0.24 ^a	43.70 ± 2.51 ^c	7.41 ± 0.17 ^a
2 weeks	5.39 ± 0.05 ^ab	11.70 ± 1.31 ^ac	12.63 ± 0.82 ^bc	7.17 ± 0.20 ^b	8.49 ± 0.40 ^a	30.25 ± 3.06 ^b	7.87 ± 0.34 ^a
12 weeks	5.65 ± 0.02 ^b	9.84 ± 0.16 ^bc	9.59 ± 0.16 ^ab	7.54 ± 0.03 ^b	8.20 ± 0.08 ^a	27.01 ± 1.78 ^ab	7.25 ± 0.07 ^a
16 weeks	5.09 ± 0.12 ^a	8.16 ± 0.46 ^b	10.67 ± 0.47 ^ab	6.48 ± 0.19 ^a	7.54 ± 0.29 ^a	19.57 ± 1.68 ^a	7.56 ± 0.38 ^a
24 weeks	5.68 ± 0.04 ^b	8.64 ± 0.35 ^bc	12.49 ± 0.70 ^ac	7.01 ± 0.10 ^ab	8.51 ± 0.24 ^a	30.52 ± 1.46 ^abc	8.89 ± 0.28 ^a
32 weeks	5.33 ± 0.08 ^ab	7.97 ± 0.33 ^ab	8.90 ± 0.23 ^a	6.40 ± 0.09 ^ab	7.02 ± 0.16 ^a	17.86 ± 1.24 ^a	6.68 ± 0.12 ^a
*p-value*	0.000	0.004	0.001	0.006	0.076	0.000	0.072