Nath Bidhan, Chen Guangnan, Bowtell Les, Nguyen-Huy Thong
School of Agriculture and Environmental Science, University of Southern Queensland, Toowoomba, Australia.
School of Engineering, University of Southern Queensland, Toowoomba, Australia.
J Air Waste Manag Assoc. 2025 May;75(5):387-404. doi: 10.1080/10962247.2024.2447480. Epub 2025 May 1.
Densification of biomass through pelletizing offers a promising approach to producing clean biofuels from renewable resources. This study, which investigates the impact of additive blends on wheat straw pellet making and upgrading the physiochemical properties, has revealed exciting possibilities. Five additives, including sawdust (SD), bentonite clay (BC), corn starch (S), crude glycerol (CG), and biochar (BioC), were chosen for this study. Pellets were made from seven different combinations using a laboratory-scale pellet mill. The resulting pellets' physical and elemental properties were assessed against ISO 17,225-8 standards. Compared to control pellets, additive blends (T-T) exhibited significant improvements in mechanical durability (80% to 99%), tensile strength (0.36 MPa to 2.09 MPa), and bulk density (244 kg/m to 665.21 kg/m), all meeting ISO standards. Additionally, these blends maintained low fines content (<2%) and water absorption capacity (<2%, except T and T). Furthermore, fixed carbon content increased from 11.1% to 30.90%, and energy content rose from 17.02 MJ/kg to 20.36 MJ/kg, which showed a significant synergistic effect of blending additives. These findings underscore the potential of wheat straw as a viable biomass source for bioenergy production through pelletization, offering a hopeful outlook for the future of renewable energy. However, further research is necessary to optimize additive mixing ratios for even greater pellet quality.: The study successfully demonstrated that adding specific materials during wheat straw pelletizing significantly improves the quality of the pellets as a biofuel. Here are the key implications of the statement.Wheat straw is a promising biofuel source: Densification through pelletizing makes wheat straw a viable option for renewable energy production.Additives enhance pellet quality: Sawdust, bentonite clay, corn starch, crude glycerol, and biochar improve the pellets' durability, strength, density, and energy content.Improved pellet properties meet industry standards: The resulting pellets meet ISO standards for mechanical strength, bulk density, and fines content.Synergistic effect of blending: Combining different additives leads to a greater improvement than using them individually.Need for further research: Optimizing the ratios of these additives can potentially create even better biofuel pellets.Overall, the study highlights the potential of wheat straw pelletizing with specific additives as a sustainable and efficient biofuel option. There's room for further improvement, but the initial findings are promising.
通过造粒实现生物质致密化，为从可再生资源生产清洁生物燃料提供了一种很有前景的方法。本研究调查了添加剂混合物对小麦秸秆制粒及改善其理化性质的影响，揭示了令人兴奋的可能性。本研究选用了五种添加剂，包括锯末（SD）、膨润土（BC）、玉米淀粉（S）、粗甘油（CG）和生物炭（BioC）。使用实验室规模的制粒机由七种不同组合制成颗粒。根据ISO 17225-8标准评估所得颗粒的物理和元素性质。与对照颗粒相比，添加剂混合物（T-T）在机械耐久性（80%至99%）、拉伸强度（0.36MPa至2.09MPa）和堆积密度（244kg/m至665.21kg/m）方面有显著改善，均符合ISO标准。此外，这些混合物保持低细粉含量（<2%）和吸水能力（<2%，T和T除外）。此外，固定碳含量从11.1%增加到30.90%，能量含量从17.02MJ/kg增加到20.36MJ/kg，这表明混合添加剂具有显著的协同效应。这些发现强调了小麦秸秆作为通过造粒生产生物能源的可行生物质来源的潜力，为可再生能源的未来提供了充满希望的前景。然而，需要进一步研究以优化添加剂混合比例以获得更高的颗粒质量。：该研究成功证明，在小麦秸秆制粒过程中添加特定材料可显著提高作为生物燃料的颗粒质量。以下是该陈述的关键意义。小麦秸秆是一种有前景的生物燃料来源：通过造粒实现致密化使小麦秸秆成为可再生能源生产的可行选择。添加剂提高颗粒质量：锯末、膨润土、玉米淀粉、粗甘油和生物炭改善了颗粒的耐久性、强度、密度和能量含量。改善后的颗粒性质符合行业标准：所得颗粒符合机械强度、堆积密度和细粉含量的ISO标准。混合的协同效应：组合不同添加剂比单独使用能带来更大的改善。需要进一步研究：优化这些添加剂的比例可能会制造出更好的生物燃料颗粒。总体而言，该研究突出了添加特定添加剂的小麦秸秆造粒作为一种可持续且高效的生物燃料选择的潜力。还有进一步改进的空间，但初步研究结果很有前景。
