The aim of this study was to evaluate the bactericidal effect of two types of pilot-scale intense pulsed light (IPL) devices constructed in our laboratory. Cassia seeds and glutinous millet, with initial microbial loads of 2.04 × 10⁴ and 5.03 × 10³ CFU/g, respectively, were treated by cyclone-type and belt-type IPL devices at total fluences of 3.89–54.43 J/cm². The maximum microbial reductions of the cassia seeds and glutinous millet were 0.74, and 0.66 log/g, respectively, when using the cyclone-type IPL, and 2.63 and 0.55 log/g when using the belt-type IPL device. The geometric mean diameter of cassia seeds and glutinous millet was 0.25 and 0.13, respectively. The cassia seeds having larger particle size than glutinous millet showed a greater bactericidal effect when treated with the belt-type device. Therefore, the design of the treatment chamber can have an improved bactericidal effect on cassia seeds, demonstrating the importance of selecting a suitable IPL device according to the size of the sample to be treated.

这项研究的目的是评估在我们的实验室中构建的两种类型的中试规模强脉冲光（IPL）装置的杀菌效果。决明子和糯米初始微生物负荷分别为2.04×10 ⁴和5.03×10 ³  CFU / g，分别通过旋风式和带式IPL设备处理，总通量为3.89–54.43 J / cm ^2。。当使用旋风分离器IPL时，决明子和糯米的最大微生物减少量分别为0.74和0.66 log / g，而当使用带式IPL装置时，其最大微生物减少量为2.63和0.55 log / g。决明子和糯米的几何平均直径分别为0.25和0.13。当用带式装置处理时，决明子种子的粒径比糯米小，其杀菌作用更大。因此，处理室的设计可以改善决明子的杀菌效果，这表明根据待处理样品的大小选择合适的IPL设备的重要性。