Design and evaluation of a new electrostatic precipitation-based portable low-cost sampler for bioaerosol monitoring
Design and evaluation of a new electrostatic precipitation-based portable low-cost sampler for bioaerosol monitoring
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DOI：
10.1080/02786826.2020.1812503
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发表时间：
2020-09
影响因子：
5.2
通讯作者：
Hema Priyamvada;Kavindra Kumaragama;Adam Chrzan;Chethani Athukorala;S. Sur;S. Dhaniyala
中科院分区：
文献类型：
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作者：
Hema Priyamvada;Kavindra Kumaragama;Adam Chrzan;Chethani Athukorala;S. Sur;S. Dhaniyala
摘要随着我们应对冠状病毒大流行，生物气溶胶对人类和生态系统健康的重要性是显而易见的。要了解病原体在空气中的迁移以及新冠肺炎等疾病的传播，需要具备以高时空分辨率监测生物气溶胶的能力。对于这种监测，迫切需要易于部署并针对下游分析进行优化的生物气溶胶采样器。在这项研究中，我们介绍了一种小型、廉价、低功耗和低压降的设备，称为TracB，它将低成本气溶胶传感与使用静电沉淀技术的生物气溶胶采样相结合。该设备专为有效收集0.01-10微米范围内的颗粒而设计，使其适用于广泛的下游微生物分析。该装置集成了低成本的颗粒充电器，提高了采样颗粒的收集效率。用苏云金芽孢杆菌变种对该装置进行了性能测试。Kurtsaki(BTK)作为不同运行条件下的生物试验菌种。通过计算流体力学模拟证实了该装置在充电器平行于颗粒流方向时能够有效地收集生物颗粒。在电离器和8KV/cm的沉淀电场作用下，生物和非生物测试粒子的收集率均在50%以上。我们的结果表明，该装置具有作为自动装置的潜力，适合在不同的室内和室外位置进行长期空气采样。版权所有(C)2020美国气溶胶研究协会
Abstract The importance of bioaerosols to human and ecosystem health is evident as we tackle the on-going coronavirus pandemic. Understanding the airborne migration of pathogens and the consequent transmission of diseases such as COVID-19 requires an ability to monitor bioaerosols at high spatio-temporal resolution. For such monitoring, there is an immediate need for bioaerosol samplers that are easy to deploy and optimized for downstream analysis. In this study, we introduce a small, inexpensive, low-power, and a low-pressure drop device, called TracB, that integrates low-cost aerosol sensing with bioaerosol sampling using electrostatic precipitation technique. The device was designed for an efficient collection of particles in the size range of 0.01–10 µm, making it suitable for a wide range of downstream microbial analysis. A low-cost particle charger has been integrated with the device to improve the collection efficiency of the sampled particles. The performance of the device was tested with Bacillus thuringiensis var. kurtsaki (Btk) as the biological test organism for different operating conditions. The ability of the device to efficiently collect bio-particles when the charger was oriented parallel to the particle flow was confirmed with computational fluid dynamics simulations. Over 50% of biological and nonbiological test particles were collected in the device when operated with an ionizer and a precipitation electric field of 8 kV/cm. Our results demonstrate the potential of the device to be used as an autonomous unit suitable for long-term air sampling at diverse indoor and outdoor locations. Copyright © 2020 American Association for Aerosol Research