High Temperature steam is a known antimicrobial heat agent. It appears that bacteria begin to die when exposed to 248°F (120°C) steam. MightySteam® delivers a highly effective up to 842°F (450°C) steam and versatile wands. The MightySteam® is a good addition for any facility that requires a clean working environment, including hospitals, laboratories and food handling plants. The MightySteam® offers quiet operations and the highest steam temperatures available in a portable steam generator. These are new steam jet spray temperatures and it is expected that many more than the studies discussed below will become available over time.
With a rapid startup time, quiet operations and low velocity steam, the MightySteam® can operate in most environments without substantial process impact. With a highly controlled output, the MightySteam® can minimize the risk of cross contamination resulting from errant overspray. The MightySteam's steam is also strong enough to quickly contact door knobs, tables, counters and other frequently contacted surfaces.
With food-borne diseases on the rise1 according to the CDC, proper sanitation has never been more important. Steam is a cost effective manner of quickly treating production surfaces. MightySteam's quick startup time and high mobility allow it to be used and put away before other steam generators have warmed up. Our revolutionary, patented technology allows the MightySteam® to continuously produce 572°F steam in around one minute.
MightySteam® doesn't need the help of chemicals to clean, it uses pure, clean steam as the agent. The MightySteam's high temperature steam can impact cleaniless of surfaces by using its intense thermal energy. More than likely less chemicals are needed.
MightySteam® cleans with lower resource consumption than traditional cleaning agents. MightySteam® utilizes only 1kW- 4.5 kW of power, compared to steam boilers that can consume 7-15kW or more of power. MightySteam's™ superheated steam is dry, leaving behind just trace amounts of clean water when used properly. Sometimes the use of a good wipe (towel) is required after the steam treatment.
Several reports (studies2) utilizing 248°F superheated steam have been published to test the effects on a variety of common bacteria. As steam temperature rises that contacts microbes, the time needed to kill bacteria decreases (thermal kinetics often have exponential impact)
In the study2, 18 hour broth cultures of Enterococci, E. Coli, CNS and Staph aureus were used. Each culture was placed in one of 6 sterile petrie dishes. Each plate, minus the control, was exposed to 1,2,3,4 or 5 seconds of superheated 248°F steam. After being exposed to the steam, all plates were cultured for 48 hours at 99°F (37°C), then colony counts were performed.
Colony Count per ml
|Organism||Control||1 Sec||2 Secs||3 Secs||4 Secs||5 Secs|
The table above illustrates that minimal colonies existed in the dish treated for 1 second, and no colonies existed in any dishes treated at 248°F (120°C) for 2 seconds or longer. This is compared to the control dish that featured over 1000 colonies for each type of bacteria except for Staph aureus, which had between 100-1000 colonies when left untreated.
The study also entailed domestic applications of steam. Common household areas including a toilet seat, toilet bowl rim, sink basin, sink faucet, bathtub, shower tile/grouting, and a shower head. The same 248°F steam for this experiment and allowed 30 seconds of total cleaning time for each object. Surfaces were swabbed prior and post cleaning, and were incubated for 48 hours at 99°F (37°C) to allow for colony growth.
|Site: Bathroom/WC||Pre cc/ml||Post cc/ml||% Survival|
|Toilet bowl rim||500000||3000||.6|
A 30 second 248°F (120°C) steam treatment in this experiment was shown to be from 97-100% effective at killing micro-organisms. The highest bacteria survival rate of 3% was found on the shower tile/grout. On other surfaces, less than 1% of bacteria remained after receiving steam treatment. With higher temperatures the efficiency is expected to increase.
University of Washington's Odegard Library, used by up to 15,000 students each day, conducted a trial comparing a superheated steam cleaning system and their existing cleaning methods. During the six week trial, custodians used a superheated steam generator to clean and sanitize restrooms, including tile, grout, walls, baseboards, plumbing fittings and fixtures. The time took and cleanliness factors were recorded before and after cleaning, then compared to their existing cleaning routines. Superheated steam took on average 42.5 minutes per restroom, compared to 46 minutes for the existing program. Time savings were commonly attributed to less bending, scrubbing and downtime while waiting for traditional chemicals to disinfect surfaces After cleaning, germ hot spots were measured. Superheated steam cleaned faucet handles and paper towel dispenser handles had 1/10th as many germs as when cleaned with traditional methods. Also to be considered are the less obvious benefits of steam over traditional methods, such as less exposure to chemicals, less chemicals to purchase and higher worker morale due to improved efficiency.
4Steam Vapor Cleaning in Hospitals
7Canadian Steam Requirements