Comparisons between Space Sterilization System and Traditional Formaldehyde Fumigation and Ozone Sterilization
Sterilization Performance
| Item | Space Sterilization System | Formaldehyde fumigation | Ozone |
| Residue | Nearly zero residue in surface space | It needs to clear away white crystals during sterilization but it can hardly remove all the residues |
It does not need to remove residues but it is also hard to remove the residue |
| Chemical Toxicity |
Hydrogen peroxide\ peroxyacetic acid is non-toxic | It may lead to cancer | EPA will not grant any certification for its strong oxidation and harm to human respiratory system |
| Sterilization Efficiency |
log4 to log6 broad-spectrum sterilization against spore and fungi Unable to fully achieve the log4 to log6 sterilization against spore | High concentration can kill spores, but it is difficult to kill spores in a clean room because of fast pyrolysis |
High concentration can kill spores, but it is difficult to kill spores in a clean room because of fast pyrolysis |
| Total Sterilization Time |
2 to 6 hours | At least 2 days | Most users perform such sterilization every day, causing a potential hazard to the compatibility of clean room environment |
| Residue Neutralization |
It does not need to neutralize residues | It needs to neutralize residues | ------ |
| Certification | The dry fog space sterilization system has been certified by EPA | Advanced pharmaceutical and biotech enterprises in Europe and America have abandoned such sterilization | No EPA certification |
| Residue Detection System |
The residual amount of hydrogen peroxide can be detected by a space residual detector | ------ | ------ |
| Cost Evaluation |
The cost shall be taken into account in terms of residue, chemical toxicity, sterilization effect and certification in compliance with national GMP and relevant international standards. Shorter downtime, better employee protection and simpler operation have guaranteed a higher performance-price ratio for the dry fog sterilization system. | ||