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Effects of Drying Methods on Serum Protein Powder Properties
Jie Zhang1, Yadi Li2, Peng Zhou1,2
1State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
Foods (Basel, Switzerland)
|July 27, 2022
Summary
Low-pressure spray drying (LPSD) effectively preserves serum protein powder properties, similar to freeze drying (FD), unlike atmospheric spray drying (ASD). LPSD offers a cost-effective method for producing high-quality serum whey protein powder.
Area of Science:
- Food Science
- Protein Chemistry
- Drying Technologies
Background:
- Serum protein powder is a valuable source of bioactive compounds.
- Drying methods significantly impact powder properties and protein integrity.
- Optimizing drying techniques is crucial for preserving protein functionality.
Purpose of the Study:
- To compare the effects of atmospheric spray drying (ASD), low-pressure spray drying (LPSD), and freeze drying (FD) on serum protein powder characteristics.
- To evaluate changes in bioactive proteins and protein profiles using proteomics.
- To determine the most effective and cost-efficient drying method for serum whey protein powder production.
Main Methods:
- Serum protein concentrate was subjected to ASD, LPSD, and FD.
- Powder properties (total solids, water activity, fat, lactose, solubility) were analyzed.
- Protein concentration and activity were measured.
- Proteomics analysis identified 245 proteins.
- Scanning electron microscopy (SEM) visualized powder microstructure.
Main Results:
- FD powder had higher total solids and water activity than ASD and LPSD powders.
- LPSD and FD preserved protein concentration and activity, while ASD decreased them.
- ASD and LPSD produced spherical powders; FD produced flake-like powders.
- No significant differences in fat, lactose, or solubility were observed across methods.
Conclusions:
- Low-pressure spray drying (LPSD) is a viable alternative to freeze drying (FD) for serum protein powder production.
- LPSD effectively retains protein concentration and activity, with a spherical microstructure.
- LPSD presents an effective and economical method for producing high-quality serum whey protein powder.
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