Supercritical Carbon Dioxide treatment of clean and soiled Filtering Face-Piece respirators is shown to meet mandatory requirements for safe reuse of FFP2. Preliminary tests enabled us to select optimal conditions for Supercritical Carbon Dioxide treatment of FFP2, for one hour at 343 K under 7.5 MPa, with a biocide solution. FFP2s from Paul Boyé ® were then tested before and after Supercritical Carbon Dioxide treatment with a soiling solution and a biological indicator (i.e. spores of GeoBacillus stearothermophilus) with respect to three objectives: (i) washing of organic deposits, (ii) sterilization (i.e. spores inactivation) and (iii) preservation of the filtration performances. The proposed Supercritical Carbon Dioxide treatment fulfils these three criterions, with effective decontamination of spores and promising washing preserving FFP2 requirements for filtration efficiency of aerosol (> 94%) with acceptable pressure drop (< 240 Pa). As a simple and low-cost one-step recycling method, Supercritical Carbon Dioxide fits to economical and sustainable development standpoints but also allows one to come back to good practices of face protective equipment use, lowering eventual shortage and tensions for most countries importing these respirators.

清洁和污染的过滤式面罩呼吸器的超临界二氧化碳处理表明满足 FFP2 安全重复使用的强制性要求。初步测试使我们能够为 FFP2 的超临界二氧化碳处理选择最佳条件，在 343 K 和 7.5 MPa 下使用杀菌剂溶液处理一小时。（即，从保柏叶®FFP2s之前并与污物溶液超临界二氧化碳处理和生物指示器之后然后进行测试。的孢子嗜热脂肪）相对于三个目标：（ⅰ）的有机沉积物洗涤，（ⅱ）杀菌（即。孢子灭活）和（iii）过滤性能的保持。拟议的超临界二氧化碳处理满足这三个标准，有效地净化孢子，并有望保留 FFP2 对气溶胶过滤效率 (> 94%) 和可接受压降 (< 240 Pa) 的要求。作为一种简单、低成本的一步回收方法，超临界二氧化碳符合经济和可持续发展的观点，但也让人们回归到使用面部防护设备的良好做法，减少大多数进口这些呼吸器的国家最终的短缺和紧张局势.