Vetiver biomass: milling test

First milling test performed in order to obtain 

heater grade chopped biomass:

Just about 30 Kg of biomass have been transformed.

The objective is to find a tool (power or engine) that chops 

leaves and stems down to the correct size for burning in an 

automatic biomass heater.

The point is, besides the size, that the product has to be 

coherent.

No further operations will have to be needed afterwards to 

preserve economicity.

The result of this first test is not completely satisfactory 

because the product presents different sizes. To achieve 

a better result, sieving is necessary in order to discard 

oversize material.

The problem starts with the machine's work: the chopping 

is done on the same axis of insertion of the biomass: this 

makes also the machine prone to choking. The final product 

is part pulverized, part oversize.

Let's move over.