Hellebrekers uses several (swimming pool) water filtration methods in practice. The principle underpinning the filtration method ranges from screen filtration to adsorption* and biodegradation. We always match the filtration set-up to the type of swimming pool and the visitors to achieve optimal water quality. (*adsorption is the process in which liquid or gaseous molecules bind to the surface of a solid substance under the influence of physical forces).
Drum filtration
Before the water from the swimming pool requiring treatment is collected in the balancing tank, it is passed through a screen in the drum filter. The drum filter removes coarse, insoluble contaminants from the water at the pre-treatment stage. Deployment of a drum filter can lead to significant savings in water usage and energy consumption. Drum filters remove much of the dirt that would otherwise accumulate directly in sand filters used at a later stage in the water treatment process. This significantly reduces the load on the sand filters and reduces the overall sand filter capacity requirement. At the same time, pre-filtration with drum filters results in a longer sand filter operating time because they do not clog as quickly and require less frequent cleaning.
Sand filtration
Sand filtration is used to remove suspended, insoluble substances from the swimming pool water. The sand filter is always located after the drum filter in the water treatment process. Like the drum filter, the sand filter acts as a screen. Swimming pool water filtration with a sand filter is similar to the way rainwater is naturally filtered by the sand in the dunes. As the rainwater seeps down through the soil layers, dirt is filtered out and the water is purified. However, the sand filter in a swimming pool is far more effective: the filter can process huge amounts of water and filters to a specific accuracy. A pump is used to force the water through the filter sand in the sand filter. During this process, various small contaminants - such as skin flakes, skin oils, body lotion, algae, insects and soil - are filtered out of the swimming pool water.
Activated carbon filtration
A third filtration method used by Hellebrekers is swimming pool water filtration via activated carbon. Activated carbon has many small pores where live bacteria settle. Activated carbon filters are often installed in addition to sand filters, specifically for pools where the contaminant load in the swimming pool water is relatively high. For example, therapeutic pools or patient care pools, hospital pools and the communal sports club pools for the players. The activated carbon filter removes urea - a substance found in sweat and urine - from the water.
