Alternative Solid Biofuels Production of High Quality Mixed Pellets from Hay and Digestate

C. Kirsten, C. Dempwolf, V. Lenz, H.-W. Schröder & J.-U. Repke
Within the present study, the production of mixed pellets made of hay and digestate with high physical-mechanical quality is presented. The dry raw materials were grinded with a hammer mill, mixed in different ratios and subsequently compacted in a commercially available ring die wood pelletizing plant on pilot scale. The main focus was set on the process parameters required for the pelletizing, like the press channel geometry or the gap between rollers and die. Furthermore,...