3.2.2 Allocation method
The allocation of environmental impacts to
materials and products is a complex process.
The appropriate method also depends on the
perspective of the observer. Economic allocation
is one of common attribution allocation. Glycerol
and sodium sulfate (Na2SO4) are generated as
co-products during biodiesel production.
Quantity and price of co-product including
allocation factor from biodiesel production are
shown in Table 3.