Could you take advantage of rainwater? Salher solutions for rainwater treatment

One of the simplest equipment for this purpose within the Salher catalogue is the rainwater recovery system (RAP) for its reuse in irrigation of ornamental plants; a rainwater storage tank made of GFRP. It can be vertical or horizontal and includes a filter with a polyamide structure resistant to high pressures that will allow to retain those typical roof solids, such as tree leaves.

Likewise, the RAP has a baffle at the inlet of the storage tank to retain sand particles, typical on covers or roofs. This tank can be fitted with a submersible pump with floating suction performing the cleaner water suction for sprinkler irrigation.

For those cases in which it is foreseen that rainwater can be stored for a long time in the RAP tank, Salher has developed a complementary equipment to conserve the recovered water: the SAL-PLU. This equipment has a compact structure and manual measurement, allowing simple and accessible maintenance of rainwater.

In car parks, garages and other cases where rainwater presents traces of hydrocarbons and sand, it will be necessary to study solutions for the separation of hydrocarbons from water. Salher has extensive experience in the design and manufacture of hydrocarbon separators and currently has different models sized in accordance with UNE-EN 858 standard in tariffs.

For those areas of intense rain in short periods of time, hydrocarbon separators with a flow bypass device are the most interesting alternative. In addition, Salher offers specific accessories for the separation of hydrocarbons such as detection alarms for hydrocarbons, sand and solids and maximum levels, sampling manholes or even pedestrian folding cover with cut-out extension.

For reuse with more demanding destinations, such as flushing in toilets, irrigation of green areas by sprinkling or dripping, there are more advanced systems that allow meeting the most restrictive requirements of the R.D. 1620/2007. These systems can be physical-chemical or physical. To guarantee the maximum health conditions, Salher recommends its equipment by filtration with high efficiency MBR-AUT membranes.

Along with rainwater, the study of the reuse of gray water is recommended due to its regular flow and that allow a constant reuse and therefore more effective in the use of resources.