The re-agglomeration phenomenon occurring during the extrusion process for pretreatment of lignocellulosic biomass under high temperature reduces the fermentable sugar yields. Prevention of the re-agglomeration at high-temperature extrusion is critical to enhancing the sugar yield. Lignocellulosic biomass was ground through a multi-step milling process and used as the raw material. The extrusion process was performed with different feedstock moisture contents of 50, 55, and 60 % (w.b.) and at barrel temperatures of 50, 100, 150, and 200 °C to create an environment that leads to re-agglomeration of the material after extrusion. A specific screw configuration was used to minimize the re-agglomeration and by modifying the heating and cooling zones. Water evaporation that induces the re-agglomeration during the extrusion process was inhibited with the new screw design without remarkable changes in the particle sizes. The particle sizes of D10, D50, and D90 were determined as 4.51–5.34 μm, 26.80–29.47 μm, and 102.33–110.67 μm, respectively.

在挤压过程中在高温下对木质纤维素生物质进行预处理的过程中发生的重新聚集现象降低了可发酵糖的产量。防止高温挤出时的再聚结对于提高糖产量至关重要。木质纤维素生物质通过多步研磨过程进行研磨，并用作原料。挤出过程是在50％，55％和60％（wb）的不同原料水分含量下进行的，并且机筒温度分别为50、100、150和200°C，以创建一个环境，该环境导致材料在重新混合后重新凝聚挤压。使用特定的螺杆配置来最大程度地减少重新聚集，并通过更改加热和冷却区域。采用新型螺杆设计，可抑制在挤出过程中引起再凝聚的水蒸发，而不会明显改变粒径。D10，D50和D90的粒径分别确定为4.51-5.34μm，26.80-29.47μm和102.33-110.67μm。