University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstrasse 9, Stuttgart 70599, Germany.
Bioresour Technol. 2014 Nov;172:396-402. doi: 10.1016/j.biortech.2014.09.037. Epub 2014 Sep 21.
The objective of this study was to investigate the pretreatment effects of high-fibre substrate on particle size distribution in a full-scale agricultural biogas plant (BGP). Two digesters, one fed with pretreated material and one with untreated material, were investigated for a period of 90days. Samples from different positions and heights were taken with a special probe sampling system and put through a wet sieve. The results show that on average 58.0±8.6% of the particles in both digesters are fine fraction (<0.063mm). A higher amount of particles (13.1%) with a length >4mm was measured in the untreated digester. However, the volume distribution over all positions and heights did not show a clear and uniform distribution of particles. These results reveal that substrate pretreatment has an effect on particle size in the fermenting substrate, but due to the uneven distribution mixing, is not homogeneous within the digester.
本研究的目的是探讨高纤维底物对大型农业沼气工程（BGP）中颗粒大小分布的预处理效果。研究了两个消化器，一个用预处理材料进料，另一个用未处理材料进料，为期 90 天。使用特殊的探针采样系统从不同位置和高度采集样品，并通过湿筛进行处理。结果表明，两个消化器中平均有 58.0±8.6%的颗粒属于细颗粒（<0.063mm）。在未处理的消化器中，测量到的长度>4mm的颗粒数量（13.1%）更高。然而，所有位置和高度的体积分布并没有显示出颗粒的均匀分布。这些结果表明，底物预处理对发酵底物中的颗粒大小有影响，但由于混合不均匀，在消化器内并不均匀。
