Barbosa et al. (2015) added Lactobacillus plantarum 299v and
Pediococcus acidilactici HA-6111-2 in non-fermented orange juice
and observed that there was no microbial viability loss after the
spray drying. Although the spray dryer used by these authors was
set at high inlet temperature (150 C), the equipment allowed
Storage during three weeks showed that
the lowest feed flow rate resulted in better microbial viability due
the lower water content. Thus, spouted bed drying at the smallest
feed flow rate (0.2 L/h), using maltodextrin as drying agent were
found as the best choice to produce probiotic orange juice powder
with high cell viability counts, with good physicochemical characteristics
that assure the powder quality. However, for industrial
application, the processing scale up must take into account
economical aspects. Increasing the size of the spouted bed chamber,
the residence time will also increase allowing a higher feedflow
rate. The scale up should search for a configuration where
the product quality is not decreased, which is possible using CFD
tools.