数字农科院2.0

Improving the capture efficiency of spore bioaerosols in a sampling device by combining acoustic agglomeration-cyclone technology

文献类型： 外文期刊

作者： Jiang, Shuyi;Zhang, Qingshi;Hou, Lixia;Zhang, Shuo;Wu, Qiang;Wei, Shuang

作者机构：

关键词： Sampling device;Acoustic agglomeration;Cyclone;Ganoderma lucidum spores

期刊名称： POWDER TECHNOLOGY

ISSN： 0032-5910

年卷期： 2025 年 469 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： The cyclone sampling method currently stands as the most efficient approach for bioaerosol sampling. However, challenges such as particle size selectivity, secondary aerosolization, and wall loss hinder the advancement of cyclonic bioaerosol samplers. Acoustic agglomeration, a widely acknowledged technique for enhancing particle size, offers a promising solution. To improve the capture efficiency of sampling device, a novel acoustic agglomeration-cyclone sampling device (AACS) was developed. This device was employed to investigate the effect of five operational parameters, such as fan speed, sampling time, sampling liquid volume, sound pressure level (SPL), and acoustic frequency, on the concentration of Ganoderma lucidum spores (GLS) in the sampling liquid. The simulated results reveal that at a SPL of 135 dB, the particle concentration at the outlet of the acoustic agglomeration chamber undergoes significant changes in particle size distribution due to the action of acoustic waves. Furthermore, when the acoustic wave frequency ranges from 1000 Hz to 1500 Hz, the particle concentration at the chamber outlet also exhibits significant changes in particle size distribution under the influence of acoustic waves. Notably, when the fan speed was set to 28,000 r/min, the sampling time to 120 s, the sampling liquid volume to 12 mL, the SPL to 135 dB, and the acoustic frequency to 1000 Hz, the GLS concentration in the sampling liquid reached 8.0 x 106 spores/mL. This concentration represents a 15.4 % increase compared to that obtained through cyclone sampling alone. The findings of this research offer a practical method to improve capture efficiency for sampling pollen and bioaerosol in the environment.

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