BioEnergy Research ( IF 3.6 ) Pub Date : 2020-12-21 , DOI: 10.1007/s12155-020-10231-7 Björn Günther , Nicole Starke , Armin Meurer , C.-T. Bues , Steffen Fischer , Martina Bremer , Maren Freese
In addition to the use as biofuel, the utilization of poplar wood as a raw material from short-rotation coppice (SRC) became increasingly important in recent years. Because poplar SRCs are harvested during dormant season, wood storage is of particular importance to guarantee wood processing industries a continuous wood supply. The study focuses on the change of physical and chemical properties of poplar wood by the application of different storage strategies over a 9-month period. Therefore, a total amount of 60 m3 test log piles were set up in 2018 for six different storage variants: compact piles, compact piles with water sprinkling and oxygen exclusion, each with logs in bark and debarked. The effects on wood moisture content, equilibrium moisture content and wood density (ρ0) and the changes in the chemical components lignin, cellulose, hemicellulose and extracts were determined and evaluated. As expected, the wood moisture content changed in a wide range over the storage period, depending on the variant. The levels of equilibrium moisture (changes from − 4% to − 13.1%) as well as wood density (changes from − 2.61% to − 9.01%) decreased for all variants between start and end of storage. Changes in chemical composition were observed for all storage variants, which indicates microbial activity supporting the assumption that the observed mass loss is driven by wood decay. Overall, changes were more homogeneous for logs in compact piles compared to the other storage methods. Considering the weather conditions during the investigated period, the results indicate that storage in compact piles with debarked logs is the best method for the conservation of poplar wood from SRC.
中文翻译:
贮藏方法对短旋毛小灌木林储存9个月杨木木材化学和物理性能的影响
除了用作生物燃料之外,近年来,利用杨木作为短旋转小灌木林(SRC)的原料也变得越来越重要。由于杨树SRC是在休眠季节收获的,因此木材储存对于确保木材加工业的木材连续供应尤为重要。这项研究着眼于杨木的理化性质的变化,方法是在9个月内采用不同的存储策略。因此,2018年针对六种不同的存储方式设置了总计60 m 3的测试原木堆:密实堆,洒水和排除氧气的密实堆,每个原木都带有树皮和去皮。(对木材的水分含量,平衡水含量和木质密度的影响ρ 0),测定并评估木质素,纤维素,半纤维素和提取物的化学成分变化。正如预期的那样,木材的水分含量在整个存储期内的变化范围很大,具体取决于型号。在开始和结束存储之间的所有变体中,平衡水分含量(从-4%变为-13.1%)和木材密度(从-2.61%变为-9.01%)均降低。观察到所有储藏形式的化学成分变化,这表明微生物活性支持假设观察到的质量损失是由木材腐烂驱动的。总体而言,与其他存储方法相比,紧凑型桩中原木的变化更为均匀。考虑到调查期间的天气情况,