The treated water has sufficiant criteria to exit to the recipient of 2. category watercourses.
Guaranteed quantity of oil after the purification of waste water with the specified input parameters is to 5 mg/l.
They are designed to purify all waste water on scheduled area in the anticipated amount to 6,5 mm/h of rainfall. This quantity covers the most common usual amount of rainfalls.
During the first storm surge, the first rush of contaminated water pass through the separator, allowing the purification of waste water. As the rainfall increases, the amount of oil is significantly reduced and water flows into the recipient through bypass instead of through the filter. Flow through baypass is designed in the ratio 1:5.
They are used in places where can occur only a small contamination, for example, personal automobile parking, or when its deemed as an acceptable risk to not to give a full treatment of water at high flow rates. In other cases it is not accceptable to use oil separators with bypass.
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