Abstract:In order to explore the new technology of food preservation, the synergistic antibacterial effect of LED visible light and organic acids were studied, and a novel storage method for the food industry was provided. The antibacterial effects of LED visible light wavelength, the type of organic acids, temperature on the Escherichia coli and Bacillus subtilis were investigated. The results showed that LED blue light had better antibacterial effect compared to green light and red light, while lactic acid had better antibacterial effect compared to citric acid and malic acid in different test conditions. The combination of the LED blue light and citric acid could achieve better antibacterial effects. With the combination of LED blue light and 1 g / kg lactic acid at 12 ℃, Escherichia coli at an anitial concentration of 6 lg（CFU/mL） could be completely inactivated, and the number of Bacillus subtilis could be decreased by（3.88±0.17） lg（CFU/mL）; At 25 ℃, compared with the blank control group, the number of Escherichia coli and Bacillus subtilis could be decreased by（4.99±0.07） lg(CFU/mL), （3.12±0.09） lg(CFU/mL), respectively.
