Graduate School of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan.
Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan.
PLoS One. 2018 Apr 23;13(4):e0196249. doi: 10.1371/journal.pone.0196249. eCollection 2018.
This study aimed to establish a new methodology for upgrading biomass quality using low-temperature (below 100 °C) oxidation to achieve simultaneous drying and decomposition. Sterilized manure (63% wet basis) was heated at 90 °C for 49 days under an oxidative environment. The obtained solid and moisture reduction curves indicated that drying and decomposition proceeded simultaneously. The biomass was decomposed by oxidation with the release of water, carbon dioxide, and volatile fatty acids such as acetic acid. The oxidation process stopped when the biomass was dehydrated, indicating that the water originally present in the biomass governed the process. Elemental and calorific analyses revealed no remarkable increase in carbon content or increased heating value, and a slight decrease in oxygen content. Although the severity of the process was insufficient to produce an optimum solid fuel due to the low temperature used, the process would enable the stabilization of waste biomass with low energy consumption such as using waste heat.
本研究旨在建立一种新的方法，通过低温（低于 100°C）氧化来提高生物质质量，实现干燥和分解的同步进行。将消毒后的粪便（湿基 63%）在氧化环境中于 90°C 下加热 49 天。得到的固体和水分减少曲线表明干燥和分解同时进行。生物质通过氧化分解，释放出水、二氧化碳和挥发性脂肪酸（如乙酸）。当生物质脱水时，氧化过程停止，表明生物质中原有的水分控制着这个过程。元素和热量分析表明，碳含量或热值没有明显增加，而氧含量略有下降。尽管由于使用的温度较低，过程的严重程度不足以产生最佳的固体燃料，但该过程可以实现低能耗废物生物质的稳定化，例如利用余热。
