## 3 Results and Discussion  
### Physical Characteristics of Pellets  
The mean values of diameter, length, density, and mechanical durability of the samples are shown in Table 1. The diameter of the pellets did not differ much, ranging from 6.12 to 6.19 mm. The pellet with the addition of RDF was slightly bigger than the control sample (WPP). It seems that the size of the pellets increased with the increasing ratio of RDF. Additionally, the pellets with the addition of RDF were longer than those with WPP. However, WPP had a higher density than the RDF samples. The density of WPP was 1.29 g/cm\({}^{3}\), while the RDF samples had a density ranging from 1.12 to 1.24 g/cm\({}^{3}\). This experiment used mixing ratios by weight, and by adding RDF, the density decreased compared to the wood pellet; however, having a higher RDF ratio could increase the density of WPP. The highest density was observed in the sample with 50% RDF addition. The findings were in line with the study by [PERSON] et al. [23]. When the pellets had a higher RDF content, the water absorption (WA) of the samples was lower. Because plastic is a hydrophobic material, mixing RDF with the pellet can reduce WPP's moisture uptake. According to this study, having a 50/50 (Wood/RDF) ratio reduced the WA of the sample by 57%. The results showed that the WA values of WPP soaked in water for 5 min ranged from 4.17 to 6.83%, while wood pellets had a value of 9.68% [27]. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline Sample & \multirow{2}{*}{\begin{tabular}{c} **Sample** \\ **Type** \\ **(Sawdust/RDF)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Sample** \\ **Type** \\ **Mean** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Diameter** \\ **(mm)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Length** \\ **(gm)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Density** \\ **(g/cm\({}^{3}\))** \\ \end{tabular} } & \multirow{2}{*}{\
\begin{tabular}{c} **Water Absorption** \\ **(\%)** \\ \end{tabular} } & \multirow{2}{*}{
\begin{tabular}{c} **Mechanical** \\ **Durability (\%)** \\ \end{tabular} } \\  & & & **Mean** & & & **Mean** & & **Mean** \\ \hline
100/0 & Control & 6.12 & \(\pm\)(0.09) & 36.48 & \(\pm\)(0.44) & 1.29  & \(\pm\)(0.42) & 98.48 [FOOTNOTE:]Footnote : Values in parentheses are standard deviation values. Mean values with the different letters are significantly different at \(p\)\(<\) 0.05.[ENDFOOTNOTE] & \(\pm\)(0.30) \\
70/30 & 70/30 & 6.18 & \(\pm\)(0.01) & 42.81 & \(\pm\)(0.77) & 1.12  & \(\pm\)(0.59) & 98.26 [FOOTNOTE:]Footnote : Values in parentheses are standard deviation values. Mean values with the different letters are significantly different at \(p\)\(<\) 0.05.[ENDFOOTNOTE] & \(\pm\)(0.06) \\
60/40 & 60/40 & 6.15 & \(\pm\)(0.04) & 40.81 & \(\pm\)(1.12) & 1.18  & \(\pm\)(0.28) & 98.87 [FOOTNOTE:]Footnote : Values in parentheses are standard deviation values. Mean values with the different letters are significantly different at \(p\)\(<\) 0.05.[ENDFOOTNOTE] & \(\pm\)(0.04) \\
50/50 & 50/50 & 6.19 & \(\pm\)(0.03) & 41.29  & \(\pm\)(0.05) & 99.06 [FOOTNOTE:]Footnote : Values in parentheses are standard deviation values. Mean values with the different letters are significantly different at \(p\)\(<\) 0.05.[ENDFOOTNOTE] & \(\pm\)(0.04) \\ \hline \end{tabular}
\end{table} 
Table 1: Physical characteristics of pellets. Meanwhile, the WPP had a mechanical durability of 98.48%. The results showed that the samples produced in this study are of high quality, with a mechanical durability value greater than 96%. However, the mechanical durability of the pellets decreased initially when 30% RDF was added but increased as the RDF ratio increased. The highest mechanical durability of 99.06% was recorded in the samples with 50% RDF addition. This phenomenon may be due to the strong association with the density of the pellets, as reported by [PERSON] et al. [16].