What is Airborne Surface Disinfection?

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What is Airborne Surface Disinfection?

zh-Hans

何谓“气载表面消毒”？

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ASD: safe and responsible disinfection by Devea

What is Airborne Surface Disinfection (ASD)?

Surface Disinfection can be either manual or airborne. Airborne Surface Disinfection (ASD) techniques bring three key advantages:
  They are reproducible;
  ASD doesn’t require a human presence;
  These techniques can uniformly reach all the surfaces of the volume to be treated, including inaccessible areas.
The disinfectant or biocide – hydrogen peroxide (H2O2) – is sprayed as a non-wetting micro-drop mist. Once the area to be treated is saturated, it settles on the surfaces and instantly kills bacteria, spores, viruses and yeasts. Hydrogen peroxide converts completely into H2O and O2 – our biocides are therefore 100% biodegradable. As there is no residue, the biocide has no residual effect. Airborne Surface Disinfection (ASD) therefore ponctually decontaminates an area without any residue.

ASD: A clear regulatory framework
  The regulation requires efficacy tests to validate two important criteria: fog homogeneous diffusion and efficacy in biocharge reduction.
  The efficacy of a diffusion can be evaluated in a simple and relatively fast way. Chemical and/or biological indicators are used to guarantee the efficiency of the biodecontamination and the safety of all users. The disinfection protocols designed with Devea are approved by the customers according to their specifications: reduction of microbial populations by 4-log10 (99.99%), 5-log10 (99.999%) or 6-log10 (99.9999%).
  The ASD device/product pair must be approved (requirements of the EN 17272 standards of 2020). Disinfectants must not only comply with the BPR (Biocidal Products Regulation) Reg (EU) 528/2012, but also be registered and authorized for marketing. Devea is the only French ASD company to be granted a Marketing Authorization for its Phileas® solutions (MA FR-2019-0071). This Marketing Authorization validates the diffuser / biocide couple and the achieved results.

See our regulatory expert interview

The key steps of the biodecontamination process
  The validation of the ASD guarantees the restoration of the treated areas to a qualified state. This method of disinfection is part of a complete hygiene process called decontamination* with two main steps: cleaning* then disinfection\* (see lexicon below). The cleaning phase is crucial as it removes organic and particulate residues and other chemical contaminants. Only a cleaned surface can be disinfected!

MicroDrop Technology: centrifugation for optimal results
  During Airborne Surface Disinfection, the liquid disinfectant is transformed into a mist and then into vapour to penetrate and kill the microbial cells. The challenge is to have the finest drops possible for a covering mist that reaches all surfaces and allows rapid evaporation.
  Devea is the only ASD player to provide micro-droplets of 5 to 10μm thanks to centrifugation, a simple and robust technology. This MicroDrop Technology produces an extremely fine and homogeneous non-wetting mist. It consumes on average 7 times less disinfectant than a manual process and 4 to 5 times less disinfectant than a vapor-based process. The recovery time of the treated area is reduced accordingly.

MicroDrop Technology: combining simplicity & efficacy
  Setting up an ASD by centrifugation is quick and easy regardless of the temperature and humidity of the room. There is no need to seal doors and windows. Micro-droplets spray is homogeneous, does not wet surfaces and does not require additional fans in the room. The recovery time is shorter due to the low doses of biocide and the size of the droplets. Lastly, O2SAFE® and PHILEASAFE® have a low concentration of H2O2 (<8%). They are therefore non-corrosive, compatible with all laboratory materials and spaces to be disinfected. Transport is not classified as dangerous.

Find out more about our biocides

Lexicon
Definitions in Annex 1 GMP (v.12, dec 2020)
Cleaning – A process for removing contamination e.g. product residues and disinfectant residues.
Decontamination – The overall process of removal or reduction of any contaminants (chemical, waste, residue or microorganisms) from an area, object, or person. The method of decontamination used (e.g. cleaning, disinfection, sterilization) should be chosen and validated to achieve a level of cleanliness appropriate to the intended use of the item decontaminated.
Disinfection – The process by which the reduction of the number of microorganisms is achieved by the irreversible action of a product on their structure or metabolism, to a level judged to be appropriate for a defined purpose.

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ASD：安全、负责的消毒，由 Devea 提供

何谓“气载表面消毒（ASD）”？

表面消毒可以通过人工操作，也可以通过气载实施。气载表面消毒（ASD）技术有三大优势：
  可再现；
  无需人员值守；
  这些技术可以均匀地到达需要处理的所有表面，包括（人类）难以触达的区域。

  消毒剂或杀菌剂——过氧化氢（H₂O₂）——以非湿润微滴气雾的形式喷洒。一旦待处理区域达到饱和状态，过氧化氢就会沉淀在物体表面，并立即杀死细菌、孢子、病毒和酵母菌。过氧化氢会完全转化为 H₂O 和 O₂，因此我们的消毒剂可以 100% 生物降解。由于没有残留物，消毒剂不会产生残留效应，因此气载表面消毒（ASD）可对区域进行实际净化，而不会产生任何残留物。

ASD：明确的监管框架
  法规要求对两项重要标准进行功效测试：气雾均匀扩散，以及减少生物负荷的功效。

  扩散效果可以通过简单、相对快速的方式进行评估。化学和/或生物指标被用于确保生物净化的效率和所有用户的安全。由于满足客户的规格要求，Devea 设计的消毒流程得到了客户的认可：微生物数量降低程度达到 4-log10（99.99%）、5-log10（99.999%）或 6-log10（99.9999%）不等。

  ASD 设备/产品组合必须获批（达到2020 年 EN 17272 标准的要求）。消毒剂不仅必须符合 BPR（消毒剂产品法规）Reg (EU) 528/2012，还必须注册并获得上市许可。Devea 凭借其 Phileas® 解决方案（MA FR-2019-0071）成为法国唯一一家获准上市的 ASD 公司。该上市许可认可了扩散器/消毒剂组合和取得的效果。

观看我们的合规专家访谈

生化消毒处理的关键步骤
  ASD 的验证可确保将处理过的区域恢复到合格状态。这种消毒方式是完整的去污*卫生流程的一部分，其包含两个主要步骤：清洁*和消毒*（见文后词汇表）。清洁阶段至关重要，它可以清除有机物、微粒残留物以及其他化学杂质。只有经过清洁的表面才能进行消毒！

微滴技术：离心处理带来最佳效果
  在气载表面消毒过程中，液体消毒剂会变成雾状，然后变成蒸汽，渗透并杀死微生物细胞。（此时的）挑战是要要尽可能生成最细的雾滴，使其覆盖所有表面，并能迅速蒸发。

  通过采用通过离心分离技术，Devea 是唯一一家提供 5 至 10 微米微滴的 ASD 厂商，该技术简单而可靠。这种微滴技术可产生极细且均匀的非湿润雾。它所消耗的消毒剂平均比手动消毒少 7 倍，比蒸汽消毒少 4 至 5 倍。处理区域的恢复时间也随之缩短。

微滴技术：兼具简便性和高效性
  无论房间的温度和湿度如何，通过离心分离技术进行ASD都非常快捷方便。无需对门窗进行密封。微滴喷雾是均匀的，不会打湿表面，也不需要在室内安装额外的风扇。由于消毒剂用量的减少和液滴的缩小，恢复时间更短。最后，O₂SAFE® 和 PHILEASAFE® 的 H₂O₂ 浓度较低（<8%）。因此，它们没有腐蚀性，可与所有待消毒的实验室材料和空间兼容。无需作为危险品进行运输。

深入了解我们的消毒剂

词典
附件 1 GMP（第 12 版，2020 年 12 月）中的定义
  清洁：清除产品残留物和消毒剂残留物等污染物的过程。
  去污：清除或减少某一区域、物体或人员的任何污染物（化学物、废物、残留物或微生物）的整个过程。应选择并验证所使用的去污方法（如清洁、消毒、灭菌），以达到与被去污物品的预期用途相适应的清洁度。
  消毒：通过一种产品对微生物的结构或新陈代谢产生不可逆的作用，使微生物的数量减少到与特定目的相适应的水平的过程。