Quality and flavor characteristics evaluation of red sea bream surimi powder by different drying techniques

The present study investigated the effects of five different drying methods, namely hot-air drying (HAD), cold-air drying (CAD), microwave combined oven drying (MCOD), infrared radiation drying (IRD) and vacuum freeze drying (VFD) on the physicochemical properties and flavor of red sea bream surimi. The L* value of the VFD treatment group (77.17) was significantly higher compared to other treatments (P < 0.05). The TVB-N content of the five surimi powder remained within an acceptable range. A total of 48 volatile compounds were identified in surimi powder, with the VFD and CAD groups exhibiting superior odor and taste characteristics, as well as a more a more uniformly smooth surface. The gel strength (4402.00 g.mm) and water holding capacity (92.21%) of rehydrated surimi powder in CAD group were the highest, followed by the VFD group. In conclusion, CAD and VFD can be considered as an effective technique for preparing surimi powder.