WATER HYGIENE AND SAFETY
the process of electrolysing ordinary tap water saturated with sodium chloride; in other words, brine. The electrolysis of the brine takes place in the unit’s electrolytic cell (see Figure 1), the unique patented design of which regulates the disinfectant pH and hence the composition of the Neuthox. From multiple injection points, the Neuthox then circulates throughout the water pipes – hot or cold – gradually removing biofilm. It continues acting to prevent the build-up of more biofilm, delivering a sustained ongoing solution. The system’s many benefits read like an estates department’s wishlist:
Cost-efficient
The results of shock dosing using the DCW system.
potential’. An oxidising agent has the ability to oxidise other substances, which causes them to lose electrons and die. This means that when the neutral hypochlorous acid breaches the cell walls, it interacts chemically with the cell’s proteins, pulling together the links that form the cell’s DNA, and it starts to die.
Once the bacteria has been destroyed, its co-dependent relationship with the biofilm is disrupted, and the biofilm begins to break up, bringing the Legionella and Pseudomonas levels back under control, and within safe or acceptable levels.
DCW’s water disinfection system DCW’s Zero Legionella disinfection system gives hospitals a new way to control biofilm, Legionella, Pseudomonas, and other dangerous waterborne pathogens. Every element of the DCW disinfection system is designed around the NHS; we were absolutely committed to developing something that is safe to handle, easy to use, effective and, at a time of stretched resources, extremely cost-effective. The DCW system is based around hypochlorous acid or Neuthox. DCW units all produce Neuthox using electro-chemical activation (ECA). ECA is
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The DCW unit is quick and easy to install, and uses the latest web-based technology for hassle- free configuration and monitoring
46 Health Estate Journal February 2019
The DCW unit requires just simple salt and water – ingredients that are cheap and easily available. It has running costs significantly lower than any other similar technologies on the market – just 1.6 pence per m3
of 30-50% compared to ClO2
unit handles both hot and cold installations, and eliminates the need to heat the water to a higher – and more costly – temperature to control bacteria levels. It requires only minimal servicing, and no regular maintenance beyond refilling the salt tablets.
Highly effective
After commissioning of the unit, in most cases the water system is free of biofilm within six weeks, controlling the amount of Legionella and other bacteria in the water, and bringing it down to safe levels. This is achieved using just one tenth of the maximum permitted dose of chlorine, and is much less than is required by chlorine dioxide disinfection. The Oxidation
Hagbard Eriksen
Hagbard Eriksen is the managing director of Danish Clean Water (DCW). Based in Denmark, he travels extensively throughout Europe, extending DCW’s market, and building key partnerships. With a background in marketing and international business, his career covers sales, marketing, strategy planning, and market penetration across the sectors, and he has been responsible for many ‘turnarounds’ in different countries and segments. He says he brings to DCW ‘a passion for driving companies forward, combining technical understanding with commercial know- how’. He is also ‘committed to developing more environmentally- friendly ways to control waterborne bacteria, ensuring that people are protected without harming the planet with the use of dangerous chemicals’.
Reduction Potential (ORP) Sensor, which measures the ability of a solution to act as an oxidising or reducing agent, controls dosing, and determines how much Neuthox is needed.
Non-toxic
The DCW unit runs on non-toxic ingredients – salt and water – which are easy to store and handle, eliminating the need for PPE. The unit imparts no odour or colour to water. After being electrolysed to produce Neuthox, the ingredients return to their previous eco- friendly, non-toxic state, where they are completely harmless to humans and animals; Neuthox has been approved by the Drinking Water Inspectorate, and its use is cited in HSG274 Part 2. It is also fully ECHA Article 95-compliant and listed.
Easy to use
of treated water, a saving . Just one
The DCW unit is quick and easy to install, and uses the latest web-based technology for hassle-free configuration and monitoring. The built-in touchscreen controller has an intuitive and user- friendly interface, and bespoke software allows for self-testing, making it easy to run a diagnostic check if needed. This fully automated control system minimises operator intervention, but if it is required, the web-based unit can be remotely configured and monitored ‘24/7’. At the start of this article, I posed the question whether there was a way to control Legionella and other waterborne pathogens that was good for the hospital, the patient, the environment, and ‘the bottom line’. Quite simply, there is – the DCW water disinfection unit for hot and cold water systems.
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