Wood Fibers & Paper Pulp
Only the Szego Mill™ can grind thick, pasty materials Products are easier to feed and handle than other technologies, such as hammer mills.
Grind pelletized wood waste to fine size at rates of 2t/h using only 20kWh/t. Wet-grind hemp fiber to 60-80 aspect ratio, similar to wood pulp.
The effect of mechanical refining on the enzymatic digestibility of pretreated corn stover (PCS) was investigated. A pilot scale refining test using a Szego mill was performed and showed approximately 10% improvements in biomass digestibility and 40% increase in xylose yield. This suggests the possibility to scale up a mechanical refining technique to obtain similar enzymatic digestibility glucose yield enhancement as achieved by PFI milling and extrusion technologies.
Biomass utilization always requires at least some preliminary processing of the feedstock. Primary size reduction to a proper level for ease of handling is essential, followed usually by further downstream processing prior to final utilization. Important considerations for such processing are cost, equipment capacity and power consumption. The Szego Mill is a excellent candidate for such downstream processing, for example after wood has been chipped.
The purpose of this report is to summarize and present substantially all work done on biomass grinding/processing using the proprietary Szego Mill. This extensive compilation of Szego Mill-related information and experimental data will be of value to users of the mill in a wide range of potential applications.
A series of tests has been conducted grinding hemp with the Szego Mill in both dry and wet operation to determine the best processing conditions for various potential applications of refined hemp fibers. Particle size distributions and power consumption have been measured. Fiber length and diameter measurements allow an evaluation of fiber aspect ratio.