Portable Gas Phase Advanced Oxidation Unit based on novel LED's and Hydrogen Peroxide Delivery System for Decontaminating Food and Non-Food Surfaces

基于新型 LED 和过氧化氢输送系统的便携式气相高级氧化装置，用于净化食品和非食品表面

• 批准号: 556362-2020
• 负责人: Warriner, Keith
• 金额: $ 2.16万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=706308
• 关键词: Portable; Gas; Phase; Advanced; Oxidation

Surfaces can carry and spread virulent pathogens leading to outbreaks of illness in local, national or global scales. For example, fresh produce has been associated with high profile foodborne illness outbreaks. Infectious agents can also be transferred via Personal protective equipment especially under extended usage. In areas subject to natural disasters there is a need to decontaminate a broad range of items when traditional sterilization technologies are not available. There are a diverse range of chemical sanitizers to decontaminate surfaces although there is a risk of toxic residues, in addition to many surfaces encountered are moisture sensitive. In the following a successful decontamination method based on gas-phase Advanced Oxidation Process (gAOP) will be adapted into a portable device for use in domestic, public or in disaster/emergency zones. The process is based on using a combination of germicidal UV light (254 nm) and hydrogen peroxide and/or ozone to generate hydroxyl-radicals that can rapidly (<30s) inactivate microbes (including endospores) on a wide range of surfaces (fresh produce, masks, electronics). The process has been successfully applied within industrial food processing and health care facilities. The proposed project will take the same gAOP principle to develop a compact, self-contained, portable surface sterilization system for food and non-food surfaces. Recent advances in LED technology have made available UV sources that are reliable, have a low energy requirement coupled with being able to utilize wavelengths that can enhance the hydroxyl-radical formation from hydrogen peroxide. Additional advantage of LEDs is the ability to power-up lights without the need for a warming-up period as required by traditional lamp based units. The hydrogen peroxide mist will be delivered via a electrospraying approach then will ensure even coverage of the oxidant around the object being decontaminated enabling on-site generation of hydroxyl-radicals. The portable gAOP will be developed and operating parameters optimized for decontaminating model food and non-food surfaces.

表面可携带和传播有毒病原体，导致地方、国家或全球范围的疾病爆发。例如，新鲜农产品与引人注目的食源性疾病暴发有关。传染性病原体也可以通过个人防护设备传播，特别是在长期使用的情况下。在遭受自然灾害的地区，在无法使用传统消毒技术的情况下，需要对各种物品进行消毒。有各种各样的化学消毒剂来净化表面，尽管存在有毒残留物的风险，此外遇到的许多表面是潮湿敏感的。在下文中，基于气相高级氧化工艺（gAOP）的成功去污方法将被改编成便携式设备，用于家庭、公共或灾害/紧急地区。 该方法基于使用杀菌紫外线（254 nm）和过氧化氢和/或臭氧的组合来产生羟基自由基，该羟基自由基可以快速（<30 s）在各种表面（新鲜农产品，口罩，电子产品）上杀死微生物（包括内生孢子）。该工艺已成功应用于工业食品加工和医疗保健设施。拟议项目将采用相同的gAOP原则，开发一种紧凑、独立、便携式的表面灭菌系统，用于食品和非食品表面。LED技术的最新进展已经使得可用的UV源是可靠的，具有低能量需求，并且能够利用可以增强由过氧化氢形成羟基的波长。LED的另一个优点是能够为灯供电，而不需要传统的基于灯的单元所需的预热期。过氧化氢雾将通过电喷雾方法输送，然后将确保氧化剂均匀覆盖在被净化的物体周围，从而能够现场产生羟基自由基。将开发便携式gAOP，并优化操作参数，用于净化模型食品和非食品表面。