A pre-test was used to fix the aspirator rate and the feeding rate at
0.6 m3/min and 500 mL/h, respectively. At a rate of over 0.6 m3/min
for the aspirator (0.75 m3/min), the samples in the cyclone went out
through the exhaust pipe with a swirling pattern (Fig. 1), and this
phenomenon resulted in a low powder yield of less than 10%. The feeding
rate also affected the quality of the maltodextrin/NaCl complexes