Abstract:Based on an industrial atomized equipment, this study was to improve the equipment efficiency of atomizing and fumigating by modifying both hardware and software, as well as the technique. By adding three sets of medicine and fumigant boxes, as well as using a high-pressure atomizing machine and an ultramicro-atomization nozzle, the diversity of atomizing, fumigation options and the automatic proportioning of fumigants (ratio range 1:1~1:200) were achieved. The optimized pressure of high-pressure atomization machine was 5.0 MPa and working time was intermittent atomizing for 75 s when performing in acrylic fumigation box. In the 550 m3 fresh storage, the optimized pressure was 6.5 MPa, working time was continuous atomizing of 7 minutes, and then the fumigant natural dropping for 3 minutes. The installation of ultramicro-atomization nozzles was "1 m for an interval". The placement area of stuff was 50 cm away from the wall, and the location of atomizing nozzle installation was vertical 0.5 ~ 1.0 m height from the placement of stuff in fresh storage. 40 mmol/L salicylate (SA) fumigating treatment was effective in maintaining the storage quality of ‘Xiaobai’ and ‘Saimaiti’ apricots. At the end of 7-d storage, the firmness of ‘Xiaobai’ apricots was 8.72 N, the soluble solids (TSS) was 15.9%, and the titratable acid (TA) content was 0.49%, which were 1.66, 1.10 and 1.58 times higher than that of the control group, respectively. The decay rate was 0 in 40 mmol/L SA treatment. The firmness of Saimaiti apricots was 9.01 N, the TSS was 13.5% and the TA was 0.67%, which were 1.57, 1.69 and 1.60 times higher than that of the control group, respectively. The decay rate was also 0 in Saimaiti apricots treated by SA. This study was aimed to provide technical support for the application of atomizing fumigation technology in fresh apricot storage and preservation.
