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

表面可携带和传播致命病原体，导致在地方、国家或全球范围内爆发疾病。例如，新鲜农产品与引人注目的食源性疾病暴发有关。传染性病原体也可通过个人防护装备传播，特别是在长时间使用的情况下。在遭受自然灾害的地区，在没有传统灭菌技术的情况下，需要对各种物品进行消毒。有各种各样的化学消毒剂去污表面，虽然有有毒残留物的风险，除了许多表面遇到的湿气敏感。下面，一种基于气相高级氧化法（gAOP）的成功去污方法将被改编成一种便携式设备，用于家庭、公共或灾害/应急地区。该工艺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，可以快速（<30s）灭活各种表面（新鲜农产品、口罩、电子产品）上的微生物（包括内生孢子）。该工艺已成功地应用于工业食品加工和保健设施。拟议的项目将采用相同的gAOP原理来开发一种紧凑、独立、便携式的食品和非食品表面消毒系统。LED技术的最新进展已经使紫外光源变得可靠，具有低能量需求，并且能够利用可以增强过氧化氢羟基自由基形成的波长。led的另一个优点是能够在不需要预热的情况下给灯上电，而传统的灯是需要预热的。过氧化氢雾将通过电喷涂方式输送，然后将确保被净化物体周围的氧化剂均匀覆盖，从而使现场产生羟基自由基。将开发便携式gAOP，并优化操作参数，用于模型食品和非食品表面的去污。

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.