Spray drying is a useful method for developing
egg process and utilization. The objective of this study was
to evaluate effects on spray drying condition of egg white.
The optimized conditions were spraying flow 22 mL/min,
feeding temperature 39.8 C and inlet-air temperature
178.2 C. Results of sulfydryl (SH) groups measurement
indicated conformation structure have changed resulting in
protein molecule occur S–S crosslinking phenomenon
when heating. It led to free SH content decreased during
spray drying process. There was almost no change of differential
scanning calorimetry between fresh egg white and
spray-drying egg white powder (EWP). For a given protein,
the apparent SH reactivity is in turn influenced by the
physico-chemical characteristics of the reactant. The phenomenon
illustrated the thermal denaturation of these
proteins was unrelated to their free SH contents. Color
measurement was used to study browning level. EWP in
optimized conditions revealed insignificant brown stain.
Swelling capacity and scanning electron micrograph both
proved well quality characteristic of spray-drying EWP.
Results suggested spray drying under the optimized conditions
present suitable and alternative method for egg
processing industrial implementation. Egg food industrialization
needs new drying method to extend shelf-life. The
purpose of the study was to provide optimal process of
healthy and nutritional instant spray-drying EWP and study
quality characteristic of spray-drying EWP.