ABSTARCT

Fibrous material extracted from biogas digestate is investigated as a possible raw material for composites. Digestate is a by-product of every biogas plant and consists mostly of water, undegraded plant biomass, and minerals. On the other hand, natural fibers and fibrous by-products are increasingly used as fiber component, especially in short-fiber reinforced plastics. The fibrous solid fraction of biogas digestate can be another alternative fiber source. The properties are decisive to determine the suitability of raw materials. Information on the length and constituents of woody and various non-woody plants can be found in the literature. In the study presented, fibrous solids obtained from digestate with a high content of hop vines are investigated. Fiber length and cell wall matter content are analyzed to characterize the digestate. The results are compared with classical plant fibers. It turns out that the investigated fibrous solids from digestate have a very inhomogeneous length distribution. The equalization can be achieved through an additional process step. The proportion of cell wall matter is comparable to that of woody plants and various non-woody plants. The fibers extracted from hop digestate can be regarded as an ecological and favorable alternative to wood fibers in composite materials.

抽象

从沼气消化物中提取的纤维材料被研究作为复合材料的可能原材料。消化物是每个沼气厂的副产品，主要由水、未降解的植物生物质和矿物质组成。另一方面，天然纤维和纤维副产品越来越多地用作纤维组分，特别是在短纤维增强塑料中。沼气消化物的纤维固体部分可以是另一种替代纤维来源。这些特性是决定原材料适用性的决定性因素。有关木本植物和各种非木本植物的长度和成分的信息可以在文献中找到。在介绍的研究中，研究了从啤酒花藤含量高的消化物中获得的纤维状固体。分析纤维长度和细胞壁物质含量以表征消化物。结果与经典植物纤维进行了比较。结果表明，所研究的来自消化液的纤维状固体具有非常不均匀的长度分布。可以通过额外的工艺步骤实现均衡。细胞壁物质的比例与木本植物和各种非木本植物相当。从啤酒花消化物中提取的纤维可以被视为复合材料中木质纤维的生态和有利替代品。