For both types of machine, the moisture content
of the compost is the most important factor. This
greatly influences the strength and the processing
speed of the pellet. The best moisture content is
about 40% for an extruder, and about 20-25% for a
diskpelleter. The fluidity of compost falls with a
lower moisture content, and friction resistance
increases as the compost passes through the hole of
the die. Therefore, the strength of the pellets
increases, although damage to the extrusion screw
may also increase, as may the power load.
The influence of the moisture content of the
raw compost in the extruder is shown in Fig. 4.
Although the strength of pellets increases, processing
performance falls by 30-5-% if the moisture content
of the compost is only 5% higher or lower than its
optimal level.
The dies of both types of molding machine
tend to block if the moisture content is too low. A
electric drill is needed to remove the blocked
compost, requiring considerable time for repairs. It
For both types of machine, the moisture contentof the compost is the most important factor. Thisgreatly influences the strength and the processingspeed of the pellet. The best moisture content isabout 40% for an extruder, and about 20-25% for adiskpelleter. The fluidity of compost falls with alower moisture content, and friction resistanceincreases as the compost passes through the hole ofthe die. Therefore, the strength of the pelletsincreases, although damage to the extrusion screwmay also increase, as may the power load.The influence of the moisture content of theraw compost in the extruder is shown in Fig. 4.Although the strength of pellets increases, processingperformance falls by 30-5-% if the moisture contentof the compost is only 5% higher or lower than itsoptimal level.The dies of both types of molding machinetend to block if the moisture content is too low. Aelectric drill is needed to remove the blockedcompost, requiring considerable time for repairs. It
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