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Global Cleaning 2014

lower temperatures are especially evident with modern microfiber economic benefits of washing at low temperatures, it is worth mops or mops that have a microfiber component. considering to switch mops in areas outside the healthcare sector. Let’s run a few numbers to illustrate (see chart below): our Just think of the savings in terms of prepping time and the gains calculation is based on a medium-sized building, say a school, in quality. Usually, switching mop covers ends up improving the and  a usage of 500 mops/day and 187 school days/year. quality of the cleaning results, in turn improving customer Para meters such as price and durability for washing were based on satisfaction. And that usually makes good business sense. If you experience. Essentially, this scenario pretty much reflects a real- can afford to invest in a larger washing capacity and have the space life situation. Please feel free to download the sample calculation for it, you would do well to provide for soaking as per at www.rationell-reinigen.de and input your own parameters. Sinner’s circle, and further maximize the advantages of low temperature washing.  Calcium precipitation increases as temperatures rise Temperature is not the only factor to impact textile durability, and Disinfecting washing at low temperatures? thus cost-effectiveness. Water hardness is also a major problem. Let’s take a look at the healthcare market. Here, normal, clean Calcium precipitation increases with heat, and at 90°C it is very washing is not enough; the textiles must be disinfected. Nowadays, high. Over time, calcium has an abrasive effect that wears down the there are already disinfecting detergents for washing at 40°C (main textile fibers, not to mention that it creates deposits that shorten area of application: clothes/delicates in retirement homes and the lifespan of a washing machine. In other words, washing at assisted living facilities). lower temperatures also means preserving textiles as well as The advantages of working with low temperatures are similar to reducing wear and tear on the washing machine. those achieved with regular washing, i.e. non-disinfecting washing. Besides temperature, detergent alkalinity is also a wear and tear The only thing is that the washing cycle per se is not shorter factor on cleaning textiles. The lower the washing temperature, because the temperature holding period is usually set longer. Most the lower the pH; and the less bleaching agent in the detergent, the chemo-thermal detergents operate on a 15-minute washing phase longer the cleaning textiles will last. Bottom line: washing at low at the set temperature. At low temperatures, the duration is most temperatures means more environmentally responsible washing frequently 20 minutes. Since the time it takes to heat is shorter, it’s at a lower cost. almost a wash as to which is better. As with most things in life, there are two sides to the story: The main disadvantages: disinfecting usually requires a greater constant washing at low temperatures without disinfectants quantity of detergent (almost twice as much) and disinfecting can lead to the spread of microorganisms that could prove a detergents are usually more expensive. Also, the gains in terms of health hazard, and most certainly create an odor problem. That durability go down due to higher alkalinity. Still, it makes is why it is recommended to wash the textiles at 90°C or run sense to wash at 40°C because the energy costs remain lower. a disinfecting cycle at regular intervals, like once a week, to Although disinfecting mop washing at low temperatures has not yet remove these microorganisms and get rid of odors.   become common practice, test washings conducted in concert with detergent and mop manufacturers have shown positive results. A Taking into account limitations mop that’s been washed at 40°C only has to last for an extra 100 Washing at low temperatures reaches its limits with really dirty washing cycles, and already it makes a difference to the bottom line, mops; this happens when they are used for several areas and only if you use 1,000 mops or more daily. rarely replaced, or if the premises are very dirty. In this case, there is no way around setting the dial at least at 60°C. The economic Thermal disinfection is often not cost-effective gains from mop durability are then also reduced. In light of the Thermal disinfection at 85°C to 90°C is often not cost-effective Number of Price/Mop Qty used/year Durability (washing cycles) mop/site 90°C 60°C 30°C 500 10.00 euros 187 400 600 800 This sample calculation shows that washing mops at a lower temperature will effectively save Costs (temperature and durability) money. You can download the template 90°C 60°C 30°C at www.rationell-reinigen.de Cost/Usage/Mop 0.0250 euros 0.0167 euros 0.0125 euros (under ‘Downloads’ on the Cost/Year/Mop 4.68 euros 3.12 euros 2.34 euros sidebar to the right) and run through scenarios with your own Cost/Year/Site 2.337,50 euros 1.558,33 euros 1.168,75 euros figures. Chart: rationell reinigen/Andreas Carl GLOBAL CLEANING | April 2014   39


Global Cleaning 2014
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