Veip Disinfectants | Legionella

Legionella

22/07/2016
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Legionella infections

Showers and other water systems can be a source of legionella infections. Legionella bacteria can (if they are inhaled) lead to severe pneumonia, known as Legionella pneumonia called the ‘Legionnaires’ disease. The bacterium which causes the disease, is located in very small numbers in the ground and in (tap) water, but in such small numbers that the bacterium is not a threat. Problems arise, however, when these gram-negative bacterium gets an opportunity to proliferate. This can occur in water with a temperature between 25 and 55 ° C. Large numbers can be achieved if the water is stationary for longer periods. Flow of the water prevents multiplication of the bacterium. If the water can not flow properly throughout the system, water will remain frozen in “dead spots” and (after renovation) closed branches of the piping system. In these places can be further growth of legionella bacteria. Especially cooling towers, air conditioning systems, whirlpools, hot tubs, drinking water networks and showers that are rarely used can be a risk. But also in fire hoses legionella bacteria, may be present. Therefore, use of fire hoses (other than in a fire) is not desirable. Should the hose still be used for other purposes than flush out water for some time (ten minutes).

Legionella Management

Building owners usually have a legionella management plan. It is assessed whether all water systems of a building has growth opportunities for legionella bacteria. This is for instance the case if the temperature of a boiler is too low (Legionella bacteria are slain at temperatures above 60 ° C) is adjusted, as heats up the cold water, or if there is any long-term standing water. (Allowing) carry out a risk assessment, (to) prepare a management plan, compliance with the management plan and, if necessary, periodically taking water samples is the responsibility of the owner of a building. The government controlled this by the Inspectorate for the Environment. These checks will be composed of assessing and monitoring compliance with the management plan, on the other hand from bacteriological samples (samples and possibly contact printing lines). If in the opinion of the inspector immediate action is required because a system is unsafe (eg. At a water temperature between 20 and 60 ° C, stagnation, long downtimes and biofilm formation) and / or a management plan is missing, while the owner of a building can not demonstrate that infection with legionella is absent, the Environment Inspectorate will take action.

Legionella control

To combat the Legionella bacteria in cooling towers, air conditioning systems, whirlpools, drinking water networks, showers and other water Veip Disinfectants has the product Halamid. According to the European standard EN 1276 Halamid has been tested and found effective against Legionella pneumophila. The test conditions were the following:

contact time: 60 minutes and 24 hours.
temperature: 30 ° C.
Water hardness: 375 mg / kg CaCO3.
Organic pollution: 0.5% fungal extract.
Halamid gave a (colony forming unit) CFU-reduction to display more than 4 Log (= from 100,000 to 100 pieces) at a concentration of 0.04% with a contact time of 24 hours. At a contact time of 60 minutes, is a 0.08% (i.e., 0.8 grams per liter of water Halamid) concentration sufficient.