CONTINUOUS STORMWATER RUNOFF TREATMENT PLANTS
1.FLOW SPLITTING CHAMBER: carries the collected rainwater from the hardstanding to the grit separator and oil separator System. When the incoming flow exceeds the design spécifications, part of the incoming water is carried directly to the end tank via the by-pass pipe
2.GRIT SEPARATOR SECTION: stilling tank in which the heavy substances (stones, grit, pièces of rubber and métal,...) settle and accumulate on the bottom of the tank. At the same time the larger light components (drops of oil, hydrocarbons and any foam) accumulate on the surface.
3.COALESCING FILTER TYPE OIL SEPARATION SECTION: thanks to the fine micro-bubble polyuréthane coalescing filter inserted into a stainless Steel grid, which can be extracted thanks to the presence of a base and guides, also made of stainless Steel, the fine particles of oil and hydrocarbons join together to form drops that are large enough to migrate towards the surface, separating from the effluent.
SPECIFICATIONS
TECHNICAL CHARACTERISTICS: The plant allows the continuous treatment of stormwater runoff from imperméable surfaces up to 27000 m2 used for transit or parking in industrial areas, residential zones and service stations subject to possible pollution from minerai oils, hydrocarbons, sand/grit and inert materials. The stormwater runoff treatment System makes use of the action of a grit and oil separator in continuous operation capable of treating flows of up to 150 l/s. Runoff from imperméable transit areas must be carried to the treatment System. The treatment tanks receive the flow appertaining to first 5 mm of rain falling over a 15 minute period.