In Section 3.1, densification of the straw is carried out without any
pine addition, and particle size is reduced at two different grinding
levels. The moisture content is modified in each test between 8 and
23%, to optimize this variable for the two grinding levels.
– In Section 3.2, barley straw is analyzed before and after entering
the pellet mill, to study the effect that compaction has on the straw
composition and calorific value.
– In Section 3.3, barley straw pelletizing is carried out with addition
of pine sawdust, which may act as a natural binder due to its high
lignin content.