ME can rise by increasing
the concentration of solids in the wall solution. According to
Jafari et al. [26], the most important factor determining the
retention of food oils during spray drying is the dissolved
solids content in the feed. A high solid content of the prepared
emulsion increases retention principally by reducing the time
required to form a semi-permeable membrane at the surface
of the drying particle. Moreover, higher total solids lead to
the increase of emulsion viscosity, preventing circulation
inside the droplets, and, thereby, resulting in a rapid skin
formation. With respect to the oil content, several reports
have observed that higher oil loads generally result in poorer
retention or lower encapsulation efficiency and higher surface
oil content of the powder