Legionella prevention system

Transcription

1 P.O. Box JC Groningen The Netherlands (0) Chamber of comm VAT nr.: NL B01 BIC: INGBNL2A IBAN nr.: NL43INGB Legionella prevention system This brochure provides a brief insight into a safe and effective system to disinfect drinking water. The system is easy to install in-line inside a water network. Without adding chemicals, the water gets disinfected and keeps the whole water system free from moulds, viruses and bacteria, such as legionella. Features of 2B Sure disinfection: Easy to install (in-line); Works effectively in warm and cold water pipes; No circulation system required; No addition of chemicals; Easy to (retro) install into existing pipe work; Active throughout the entire pipe system; Easy to control; Automatic database (on request); Little maintenance required; Reduces bio-film; Low energy consumption; Durable; Safe. 1-8

2 2B Sure in practice Moulds, viruses and bacteria exist in water. To prevent proliferation of these moulds, viruses and bacteria, it is essential to disinfect the water. The principle of electrolysis can be used for disinfection. In the process of electrolysis, water is exposed to a low-voltage direct current between two electrodes. Thereby, all salts that exist in water are converted into oxidising and disinfecting substances. One of these substances is sodium hypochlorite, which kills a great variety of germs and is therefore widely applied to disinfect drinking water. Another advantage is that the germs can not become resistant to Sodium hypochlorite. This all means that no chemicals have to be added to the water for the purpose of disinfection. The 2B Sure system works based on the principle of electrolysis. It consists of one electrode cell that is installed inside the water pipe or onto water storage tanks. The control box activates the electrolysis process. A flow sensor is installed to detect flow. At no flow, the electrolysis process is switched off, as soon as flow exists, the electrolysis process produces chlorine proportional to the flow. The disinfecting agent is only produced when the water contains enough salts. However, in most countries the drinking water contains a sufficient amount of salt for the electrolysis process. Easy to integrate The 2B Sure disinfection system provided by HSD Water is compact. Therewith, it is easy to retrofit in existing pipe work. Effective The 2B Sure system provided by HSD Water works effectively in the entire piping network, because the water is the transportation medium of the disinfectant that has been produced. The disinfecting agent also reduces bio-film. Easy to control With the use of test strips, that have to be held underneath the running water tap, it is easy, effective and convenient to control the quality of the drinking water before and after the treatment. Automatic datalogging The 2B Sure disinfection system is equipped with a datalogger. At every point in time, you can check the functioning of system and further specific information with the push of a button. Low - maintenance The 2B Sure disinfection system requires only a minimal amount of maintenance due to its unique and robust design. This ensures the optimal performance of the system

3 Reduction of bio-film Legionella and other micro-organisms can settle inside pipes and form a biofilm. Biofilm supports the growth of legionella. Combating legionella in a piping network that contains bio-film is harder than combating legionella in water pipes without bio-film. The 2B Sure disinfection reduces biofilm and therewith creates a habitat which does not support multiplication of legionella. Low energy consumption Another advantage of the 2B Sure disinfection is its low energy consumption. HSD Water ensured that energy demands are as low as possible. Maximum consumed power are 500 watt for a 10 m 3 /h system. Durable 2B Sure disinfection stands for years of loyal service 24 hours per day. Durable materials are used that ensure an optimal operationality of the system Safe The 2B Sure disinfection is safe in usage. A control unit detects at any time the system. At adversities the system gives an alarm. 2B Sure in practice The electrodes are mounted inside the drinking water line just behind the water meter, in a by-pass, or with the circulation pump system near the water storage tank; this all ensures that you can still use drinking water during maintenance work. In water pipes that are clean and free from Legionella, the system works immediately. In water pipes that are affected by Legionella it is advisable to flush the pipes several times

4 max. Pipesystem m³/h Number of electrodes per packet Input voltage (VAC) Energy usage (Watt) Line connection (mm copper) Daylight linework (cm) Width of installation of llinework (cm) Dimension of control unit (lxwxh) (cm) Technical data: x14x x14x x14x x14x x14x28 Optional: Modem: Chlorine sensor: Analogical modem to send alarm signals via GSM or beeper at trouble shooting controls constantly the amount of produced sodium hypochlorite It is possible to integrate the system into an alarm device Please feel free to contact us for specific information for the system including circulation pump, which is developed for hotels and buildings with water storage tanks with a maximum capacity of 50m³

5 2B Sure 1&2m³/h 2B Sure 3m³/h 2B Sure 5m³/h 2B Sure System including circulation pump 2B Sure 10m³/h

6 What is legionnaires' disease? Legionnaires disease is an uncommon but severe form of pneumonia (lung infection). Approximately 13% of those people that catch the disease die. Legionnaires disease is caused by legionella bacteria. These bacteria can also cause less serious illnesses. The infected person usually begins to feel less well 3-6 days after catching the infection, although it may take longer in some cases. How can people get the disease? People can get the disease by breathing in air that contains the legionella bacteria in invisible water droplets known as an aerosol. Aerosols can be formed whenever fine droplets are generated from contaminated water. In hotels that do not have an effective legionella control programme these droplets may source from a running water tap or shower, a flushing toilet, or from bubbles rising through water in a spa pool. The bacteria, which also lives naturally in this environment can live and multiply in water at temperatures of 20 C up to 45 C. Large amounts occur in inadequately maintained water systems. What are risk areas? Risk areas are wherever water droplets are created: Showers and taps; Spa and whirlpool baths; Turkish baths and saunas; Cooling towers and evaporative condensers used for air conditioning, even if situated on the roof or in the ground; Ornamental fountains, particularly indoors; Humidified food displays. Where can legionella multiply? Hot and cold water tanks / cisterns; Warm water between 20 C and 45 C; Pipes with little or no water flow (this includes unoccupied rooms); Slime (bio-film) and dirt on pipe and tank surfaces; Rubber and natural fibres in washers and seals; Water heaters and hot water storage tanks. The above mentioned conditions support the growth of legionella bacteria and increase the risk of infection

7 General Information on Anti Legionella; Fighting measures At present, in the Netherlands legionella is combated by the thermal control measurement. However, this measurement is often refused due to the following reasons: High modification costs, as the existing installation has to be capable of producing sufficient warmth; High energy costs; Risk of injury for the operator; Non-familiarity with the installation increases the risk of infection. HSD Water, with its anodic oxidation system, offers an alternative technique to the thermal control measurement that can be applied in order to combat legionella in tap water installations. The conditions for the application of such a system were established in the Dutch sample control plan to combat legionella (VROM, August 2001). Following this plan, the method should: Be an alternative measurement (in contrast to the thermal disinfection method) with a verifiable assimilable effect on eradicating legionella bacteria; Have no side effects on public health or the environment. Tests from C-Marc showed that the systems meet all conditions and expectations. 2B Sure System including circulation pump 2B Sure System

8 Summarization of the results of the pilot project: Anodic oxidation system 2B Sure On behalf of the Dutch ministry for construction, physical planning and environment (VROM), executed by KIWA. Objective of the analysis: Proof of effectiveness of the system; Proof that the system does not have unacceptable side effects on the public health and environment; To meet the expectations of VROM regarding being an alternative technique to combat legionella. Introduction: 2B Sure was applied from May 2004 until and including September 2005 as a pilot project at the sportspark ASC in Waterdijk, close to Almere. This park exceeded the Dutch legionella norm (<100 CFU/l) constantly with CFU/l. A risk and combat concept was written. However, the applied measurements to combat legionella were unsuccessful. In deliberation with the client, the municipality Almere, was decided to apply a 2B Sure System in order to combat the legionella. Result: During the pilot test the following has been observed: A level of free chlorine of 0.4mg/l is necessary in order to keep the legionella below 100 CFU/l; A level of free chlorine of 0.2 mg/l is effective to keep legionella below 100 CFU/l at 22 C; When applying a 2B Sure System in the Netherlands, a concept of risk and combat must be existing. The written measurements in this concept have to be applied. Conclusion: Effectiveness: The pilot test showed that the 2B Sure system eradicates legionella bacteria effectively. The 2B Sure system was tested on possible side effects on the public health and the environment. Values of the concentration of Trihalomethane and haloethanacid were tested. There were no side effects found. Therewith, the 2B Sure system meets all conditions and expectations. This was written down in part lllc of the Dutch waterline resolution (VROM, Dec 2004)