3.2. Definition of the drying process
Three different technologies, namely microwave, PCD and both
a static and rotary oven, were identified as the most appropriate
technologies for drying vegetable wastes. As such, different tests
were carried out to optimise the operating conditions (essentially
temperature and power consumption) for each of these technologies.
The optimal values were 85 C for a static oven, 110 C for a
rotary oven, 140 C for PCD, and 1000W for microwave drying.
The different prototypes obtained with each technology under
these operating conditions were analysed to ensure that they fulfilled
all requirements for use as raw materials in animal feed.
The analytical results for the different vegetable meals obtained
are shown in Table 4.