The bulk density plot indicated that with an increase in feedstock moisture content to 20% (w.b.) and the grinder speed to 60 Hz, the bulk density values increased to >202 kg/m 3, whereas lowering the feedstock moisture content to 10% (w.b.) and the grinder speed to about 20 Hz reduced the bulk density to <188 kg/m 3 (see Figure 10).
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