The building services sector is heavily reliant on high quality companies such as ourselves who have the capability to ensure that new heating and chilled water systems are professionally cleaned in accordance with the latest BSRIA guidance. Systems that have been successfully cleaned and commissioned will far outlive systems that have been neglected or incorrectly cleaned and will also be far less susceptible to bacteriological contamination such as Pseudomonas and Sulphate reducing bacteria. The ultimate benefit to these processes is increased efficiency and cost saving due to the fact that the systems can operate to their intended design.
Poorly maintained systems will often become contaminated with sludge,scale and corrosion products. Not only do these deposits affect the day to day efficiency of the systems but they also act as nutrients for bacteria (pseudomonas and sulphate reducing bacteria). These bacteria can subsequently cause severe fouling and catastrophic corrosion. Concept Environmental can provide a variety of remedial measures to counter these problems, such as chemical cleaning using specific iron sequesterants and biocide washing using the latest closed circuit biocides. We can also offer less, ‘intrusive’ means of cleaning through various forms of filtration.
It is estimated that 1.5mm of scale in a hot water cylinder will reduce efficiency by up to 15%. Removal of scale (and more importantly prevention of scale through ion exchange water softening) will reduce utility bills, increase performance and have a positive environmental impact. Concept Environmental provide specialist acid descaling services for boilers, heat exchangers, cooling towers and hot water calorifiers.
BS8558 2011 is the British Standard for the design, installation,testing and maintenance of hot and cold water systems. All new systems have to be disinfected in accordance with this British Standard to ensure any contaminants ‘created’ from the installation process are removed to help ensure that water that is subsequently supplied to building occupants is both wholesome and potable.
Chlorine dioxide is extensively used at potable levels to control the growth of legionella and other potentially harmful bacteria in water systems. Where it is not possible to dose disinfectants at high levels due to constant building occupancy(ie hotels and hospitals), chlorine dioxide is considered the most effective means of control and has various benefits that other products such as sodium hypochlorite(chlorine) just cannot offer.
The HSE ACoP L8 and HSG274 (part 2 – the control of legionella in hot and cold water systems) state that storage tanks must as a minimum be inspected on an annual basis and if deposits are present then they must be cleaned and disinfected. Mains water supplies into buildings, although potable do invariably contain deposits such as silt and these contaminants subsequently enter the storage tanks they are feeding. Annual tank cleaning and disinfection is therefore considered industry standard practice. Under the same regulations cooling towers need to be cleaned and disinfected on a 6 monthly basis. Cooling towers are considered high risk items of plant with regard to legionella risk and it is therefore imperative that towers are cleaned and disinfected in a very particular manner and by experienced and competent staff
We are very fortunate to have competitive access to all the latest chemical products within the industry and we can offer a suitable solution for almost any requirement. We are acutely aware of our environmental responsibility and this is reflected in the technologies we use and the chemicals we therefore promote.
A good maintenance and control regime is critical to the effective operation of these items of plant. Failure to maintain the water quality in cooling towers and steam boilers can lead to catastrophic results either mechanically,financially or from a health and safety perspective.
Investing in a water treatment control programme will protect you from all of these risks and ensure that your plant operates efficiently and in a safe manner.