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Is Dry Steam a Detergent and Disinfectant??

OBJECTIVE

We want to Prove that professional or industrial dry steam cleans and disinfects .

The aim of this study is to evaluate the effectiveness of a cleaning and disinfection procedure with a steam process on different surfaces commonly found in the food industry.

METHODS

The tested surfaces (stainless steel, the painted metal and tile) were cleaned directly with the STEAMBIO 19000 ( with turbo nozzle).

In addition, the system STEAMATIK mobile connected to the STEAMBIO 19000 was also used to clean a conveyor belt (PVC).

Detersive action evaluated by the ATPmetry method.

Samples were taken from an area of 100 cm2 of piston. Once the buffer is put inside the luminometer (Luminomat, AES Chemunex), the amount of ATP is given in RLU (Relative Luminescence Units).

Biocide action evaluated by Petri dish.

Agar plates (Hygicount, AES Chemunex) were pressed on the surface for 15 s (NF EN 1632-3 standard) and incubated for 48 h at 30°C. Results are given as colony forming units (CFU) per plate.

Taking samples Agar pressure of a PETRI canister on a dirty substrate

RESULTS: DETERGENT ACTION OF STEAM

Visually, there were traces of dirt on the tiles.

We also find residues of edible fats on the stainless steel and on the conveyor belt.

And mainly dust and air pollution on the metal.

ATP <10: propre

10 <ATP <30:
"moderately clean"

ATP > 30: dirty

ATP METRIE measurements before and after steam cleaning

Quantity of ATP in ULR (parent luminescence units)

ATP measurements for the different areas, before and after steam cleaning

RESULTS: BIOCIDAL ACTION

disinfection results after steaming

can dry steam disinfect? can dry steam clean and disinfect?
                     BEFORE
                       AFTER

Number of colony-forming units (CFU) that were isolated on agar plates for the different areas before and after steam cleaning

Contamination

Tiles are the most popular surfaces for the more contaminated before the cleaning. This high rate could be explained by the presence on the ground of micro - organizations. Stainless steel and the conveyor belt show a similar level of contamination, probably by reason for the presence of flora of food . After cleaning at steam, all the surfaces show a very strong decrease in the number of micro - organismes (<4 CFU / plaque), this being the evidence of the lethal action of the steam water on the germs present on the surfaces.

CONCLUSIONS

According to the study, under our experimental conditions, the steam cleaning and disinfecting procedure shows excellent detergent effectiveness by removing dirt from a wide range of solid substrates without damaging them. In addition, dry steam has a very excellent biocidal disinfectant action on microorganisms that are naturally present on surfaces.

If you want more details, contact us .

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