Abstract
This study aimed to estimate the effects of extrusion variables on extruded aquafeed water solubility using a starch gelatinization model. A new equation was derived from a classical starch gelatinization degree model to calculate aquafeed water solubility. After considering the data of five formulations, the average absolute deviation (AAD) of the new equation was 7.97% for the extrudate water solubility and 2.24% for the water solubility index. In the most cases, water solubility and water solubility index increased with an increase in the process screw speed and temperature but decreased with a decrease in water content. On the other hand, when the moisture content increased from 0.2 to 0.3 kg/kg, the water solubility increased from 4.91 to 5.22% (wt) for a typical recipe in the low moisture content extrusion process. The new equation established a way to quantitatively elaborate the relationship between the extrudate water solubility and extrusion process variables.
| Original language | English |
|---|---|
| Journal | International Journal of Food Properties |
| Volume | 25 |
| Issue number | 1 |
| Pages (from-to) | 463-476 |
| Number of pages | 14 |
| ISSN | 1094-2912 |
| DOIs | |
| Publication status | Published - 2022 |
Keywords
- Extrudate water solubility
- Model
- Starch gelatinization
- Extrusion
- Water solubility index