VHP has emerged as the premiere process in biodecontamination, distinguishing itself from other methods like atomizing, fogging or condensing processes.
This article outlines the unique capabilities of VHP™ units, particularly focusing on their excellent coverage/contact and material compatibility.
The Superior Dispersion and Efficacy of VHP Technology
Effective biodecontamination hinges on the comprehensive contact of the antimicrobial agent with contaminated surfaces.
This is where the method of dispersal becomes crucial, influenced by factors such as particle size, application technique and the specific environmental conditions of the target area.
In this section, we’ll talk about the advantages of VHP, focusing specifically on coverage. The next section outlines material compatibility.
VHP's Edge: Submicron Particle Size for Enhanced Coverage
When it comes to coverage, VHP systems stand out, as they produce hydrogen peroxide vapor with a submicron particle size.
This fine dispersion allows for an extensive reach, insignificantly impacted by gravity, ensuring the vapor remains suspended and penetrates the most challenging spaces with ease. This characteristic is vital for effective biodecontamination, as it allows VHP to access hard-to-reach areas that are often neglected by other methods.
Limitations of Foggers and Atomizers
Foggers and atomizers generate larger liquid particles, typically ranging from 3-100 microns.
The size of these particles means they’re more influenced by gravity, leading to a quicker settling and reduced hang suspension time. This results in diminished efficacy, particularly in hard-to-reach areas, as the larger particles settle more rapidly.
The precipitation effect of these methods can also limit their dispersion capabilities.
They’re less effective in areas like the undersides of tables, ceilings and small spaces where pathogens are prone to accumulate.
The Issue of Condensation
Another factor affecting fogging or atomization methods is condensation.
In environments with high saturation, condensate can attract vapor, altering the concentration of hydrogen peroxide vapor in the target space.
This can lead to uneven distribution of highly concentrated liquid hydrogen peroxide, which poses risks of material damage and inconsistent sporicidal activity. Such non-uniform distribution can compromise the overall effectiveness and repeatability of the biodecontamination process.
VHP's Advantage: Integration with Existing Systems
A significant benefit of VHP technology is its compatibility with existing infrastructures.
Unlike fogging or aerosolization systems that require additional equipment or nozzles within the biodecontamination space, VHP can utilize a facility’s HVAC system for distribution — eliminating the need for additional nozzles or equipment in the target space.
The ability of VHP to permeate through HEPA filters as a vapor simplifies the biodecontamination process and enhances the distribution and effectiveness of the treatment.
Overall, VHP technology offers a more efficient and effective process for critical environment biodecontamination, overcoming the limitations commonly associated with traditional fogging or atomizing methods. Its superior dispersion, ability to reach challenging areas and integration with existing systems make it a preferred choice for ensuring thorough and reliable biodecontamination.
Material Compatibility of VHP in Sporicide Application
Sporicides are essential in environments where sterilization and biodecontamination are critical, but their effectiveness hinges on their ability to inactivate resilient spores.
The ideal sporicide should exhibit rapid and broad-spectrum microbiocidal activity without compromising its usability in sensitive settings. This balance is crucial, as some active ingredients, though effective against microorganisms, may adversely affect materials they contact.
Material Compatibility: A Key Consideration
Material compatibility should be considered when determining which biodecontamination method to use. For instance, hypochlorous acid, while potent as a microbiocide, poses risks to material integrity.
Repeated exposure to these substances can be particularly harmful to sensitive materials, necessitating cautious application on compatible surfaces, such as stainless steel, glass and non-porous walls and floors.
VHP's Advantage in Material Compatibility
The application of sporicides in vapor or aerosolized form poses a unique challenge.
These sporicides come into contact with a wide array of materials, substrates and equipment, including sensitive items like electronics and soft metals. As a result, the sterilizing agent and the application process must exhibit broad material compatibility.
In this area, VHP excels with its dry vapor form, making it suitable for a diverse range of materials. The VHP process, which typically maintains 200-1400 ppm in an enclosure's atmosphere, is controlled to avoid excessive condensation on surfaces. The non-condensing nature of VHP technology ensures extensive compatibility with various substrates and sensitive electronics.
Addressing Misconceptions and Comparing Methods
There's a misconception that a 35% VHP solution is more corrosive than a 7-12% solution used in foggers or atomizers.
The VHP process, with its precise atmospheric control and avoidance of excessive condensation, significantly reduces risks to sensitive materials.
In contrast, the initial stage of fogger or atomizer processes, which involves the dispersal of liquid sporicide as suspended droplets, can lead to condensation. Significant amounts of condensation can result in highly concentrated liquid peroxide, potentially damaging sensitive materials.
Conclusion
VHP technology provides many benefits as a highly effective, versatile and safe method for biodecontaminating controlled environments.
Its unique ability to operate in a variety of enclosure conditions, coupled with its comprehensive coverage and material compatibility, makes it a preferred choice over traditional atomizing, fogging or condensing methods.
As industries continue to seek more efficient and safer biodecontamination processes, VHP is poised to play an increasingly pivotal role, offering unmatched efficacy and reliability.
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