**Table 5 here**
Independent experimental data from the CCRD experiments performed at a
similar ultrasound power (65%), at which the kinetics were obtained
(68%), were selected to test the ability of the model in predicting the
reaction yields. The experimental and predicted FFA yield values are
shown in Table 6 . It can be concluded that the model was able
to predict the hydrolysis yield within the evaluated range of the
conditions, with an average deviation of 11.46%. The model was,
therefore, suitable to explain the mechanism of the reaction of
enzymatic hydrolysis of vegetal oil using vegetal lipases and can useful
for phenomenological studies and process optimization.
3.5. Comparison Between the Enzymatic Seed
Particles
To the author’s knowledge, there is no work in the literature evaluating
the use of ultrasound in the oil hydrolysis reaction, using castor seeds
in any form as a lipase source. Previous work was conducted employing
castor seeds, in natura and oil-free forms, to the enzymatic hydrolysis
of Crambe oil, from the same research group (Tavares et al., 2018a) and
will be used as a comparison between the seed particles with and without
the ultrasonic treatment. The previous results, along with the results
presented in this work, are summarized in Table 7 . It is
essential to highlight that although different granulometry was used
among the forms of catalyst seeds, the comparison can still be useful,
as only the kinetic of the reaction will be impacted, reaching
equilibrium at different times but without changing the equilibrium
condition (final yield of the reaction).