Optimization of spray drying technology inprocessing chicken plasma protein

In order to utilize chicken plasma protein resources, the technique and optimal parameters for separation and spray drying process of chicken plasma protein was investigated in the paper. First, the effects of centrifugal speed and time on the separation process were studied. Using SD-BASIC spray dryer (Labplant, UK), different inlet air temperatures and feeding rates on the physicochemical properties of chicken plasma protein powder were determined, including yield, moisture content, protein content, nitrogen solution index and the color. The results indicated that centrifugal speed and time have significant influence on the separation of chicken plasma (p<0.05) and the optimal centrifugal operation parameters were that chicken blood was centrifuged at 3000 r/min for 15 min. The spray drying inlet air temperature, feeding rate and the interaction between them had significant influence on quality of chicken plasma protein powder (p<0.05). The yield, moisture content, protein content and nitrogen soluble index of chicken plasma protein powder were 64.289%, 4.514%, 72.644% and 97.295% respectively under the optimal processing parameters of the airflow pressure 0.3 MPa, introduction temperature 25℃, inlet air temperature 150℃ and feeding rate 0.167 mL/s, and the qualities of product were good. The results are expected to provide some fundamental data for the industrial production of chicken plasma protein.