Hellebrekers uses various filtration methods to treat pool water, relying on principles such as the sieve effect, adsorption and biodegradation. We always tailor the filtration method used to the type of pool in question and the visitors who swim there, to guarantee optimum water quality.
Before the pool water requiring treatment makes it way to the buffer tank, it is ‘sieved’ in the drum filter, which pre-filters coarse, insoluble contaminants from the water. Using a drum filter can lead to considerable savings in, for example, water and energy consumption. Drum filters retain a large proportion of the dirt that would otherwise go straight into sand filters further downstream in the water treatment process, relieving the burden on the sand filters, which consume a lot of electricity, and allowing for a smaller sand filter capacity. At the same time, pre-filtration with drum filters increases the lifespan of the sand filters because they stay cleaner and require less frequent cleaning.
Sand filtration is used to remove suspended, undissolved solids from swimming pool water. The sand filter usually follows the drum filter in the water treatment process. Like a drum filter, the sand filter effectively sieves the water in a way that can be compared to how rainwater is naturally filtered by sandy dunes. The rainwater sinks through the layers of sand, which filter out dirt and purify the water. However, the sand filter in a swimming pool is much more effective: it can handle vast quantities of water and filter out tiny contaminants. With the help of a pump, the water is forced through the sand filter, which filters out various kinds of small contaminants such as skin cells, skin oils, body lotion, algae, insects and sand.
A third filtration method used by Hellebrekers involves activated carbon, a material with a large number of tiny pores in which small bacteria can settle. Carbon filters are often installed in addition to sand filters, for pools and baths in which the water is subjected to relatively large-scale contamination, such as therapy or care baths, hospital baths and baths in players' homes at sports clubs. The carbon filter employs two filtration mechanisms. On the one hand, it removes bound chlorine, which ‘sticks’ to the activated carbon in the filter. On the other hand, the bacteria in activated carbon cleanse the water of urea, a substance found in sweat and urine.