Production and evaluation of briquettes from urban pruning residue and sugarcane bagasse

ABSTRACT The search for new alternatives in order to reuse residues is one way to minimize environmental impacts by promoting sustainable practices. This study analyzed the technical feasibility of briquettes production from urban pruning residue and sugarcane bagasse, turning them into a product with higher added value besides directing their use and reducing their improper disposal. Five treatments were studied from different ratios of the two residues: T1, T2, T3, T4 and T5, respectively made of 100% of urban pruning; 50% urban pruning and 50% sugarcane bagasse; 25% urban pruning and 75% sugarcane bagasse; 10% urban pruning and 90% sugarcane bagasse; 100% sugarcane bagasse. The materials were characterized physically, chemically and energetically. Briquettes were produced and evaluated for mechanical performance, with expansion tests, mechanical resistance and friability to verify the quality of the final product. The treatments 1 and 2 showed the best results, with lower friability and average values of mechanical resistance of 167.14 and 107.56 kgf, respectively. It is concluded that both residues (sugarcane bagasse and urban pruning) had potential for briquette production, as well as the mixture between both materials.

摘要 本研究指出，寻求废弃物资源化利用的新型替代方案，是通过推广可持续实践以降低环境影响的重要途径之一。本研究分析了以城市园林修剪废弃物（urban pruning residue）与甘蔗渣（sugarcane bagasse）为原料制备生物质压块（briquettes）的技术可行性，旨在将两类废弃物转化为高附加值产品，同时规范其资源化利用路径并减少不当处置行为。本研究针对两类废弃物的不同配比设置了5组实验处理组：T1、T2、T3、T4、T5分别为100%城市园林修剪废弃物、50%城市园林修剪废弃物+50%甘蔗渣、25%城市园林修剪废弃物+75%甘蔗渣、10%城市园林修剪废弃物+90%甘蔗渣以及100%甘蔗渣。研究团队对原料开展了物理、化学与能量特性表征，随后制备生物质压块，并通过膨胀试验、抗压强度测试与易碎性分析评估其力学性能，以验证最终产品的质量。实验结果显示，T1与T2组表现最优，其易碎性更低，平均抗压强度分别为167.14 kgf与107.56 kgf。研究结论表明，两类单一原料及其混合原料均具备制备生物质压块的应用潜力。