Unit of Environmental Engineering, Section of Waste Treatment and Resource Management, Universität Innsbruck, Technikerstraβe 13, 6020 Innsbruck, Austria; alpS - GmbH, Grabenweg 68, 6020 Innsbruck, Austria.
Unit of Environmental Engineering, Section of Waste Treatment and Resource Management, Universität Innsbruck, Technikerstraβe 13, 6020 Innsbruck, Austria.
Waste Manag. 2017 Jun;64:12-19. doi: 10.1016/j.wasman.2017.03.001. Epub 2017 Mar 13.
The aim of the mechanical pretreatment in case of anaerobic digestion of biowaste is to produce a substrate without impurities. To facilitate a failure free operation of the anaerobic digestion process even small impurities like stones or sand should be separated. As a result of an insufficient pretreatment or impurities separation, plant malfunctions, increased equipment wear or pipe clogging are reported. Apart from grit chambers or pulper systems, a hydrocyclone is a cost-efficient and space-saving option to remove impurities. The aim of this work was to investigate the efficiency of hydrocyclones for the separation of impurities. Two hydrocyclones at two different plants were investigated regarding their capability to separate the small inert impurities from pretreated source separated biowaste. In plant A, the hydrocyclone is part of the digester system. In plant B, the hydrocyclone is part of the biowaste pretreatment line (after milling and sieving the biowaste) before digestion. Separation rates of inert impurities such as stones, glass and sand were determined as well as the composition of the concentrated solids separated by the hydrocyclone. Due to the heterogeneity of the biowaste the impurity separation rates showed variations, therefore the following mean results were obtained in average: the investigated hydrocyclones of plant B, part of the biowaste treatment, separated more than 80% of the inert impurities in the waste stream before anaerobic digestion. These impurities had a size range of 0.5-4mm. The hydrocyclone integrated in the digester system of plant A showed separation rates up to 80% only in the size range of 2-4mm.
在生物废物的厌氧消化中，机械预处理的目的是生产无杂质的底物。为了促进厌氧消化过程的无故障运行，即使是像石头或沙子这样的小杂质也应该分离。由于预处理不足或杂质分离不彻底，会导致设备故障、设备磨损增加或管道堵塞。除了砂粒室或碎浆系统外，水力旋流器是一种经济高效且节省空间的选择，可以去除杂质。这项工作的目的是研究水力旋流器对杂质分离的效率。在两个不同的工厂中研究了两个水力旋流器，以考察它们从预处理的源分离生物废物中分离小惰性杂质的能力。在工厂 A 中，水力旋流器是消化器系统的一部分。在工厂 B 中，水力旋流器是生物废物预处理线（生物废物经过粉碎和筛分后）的一部分，然后进行消化。测定了惰性杂质（如石头、玻璃和沙子）的分离率，以及水力旋流器分离出的浓缩固体的组成。由于生物废物的不均匀性，杂质分离率存在差异，因此平均获得了以下平均结果：工厂 B 的被调查的水力旋流器，是生物废物处理的一部分，在厌氧消化前，从废物流中分离出超过 80%的惰性杂质。这些杂质的尺寸范围为 0.5-4 毫米。工厂 A 的消化器系统中集成的水力旋流器仅在 2-4 毫米的尺寸范围内显示出高达 80%的分离率。
