INFINITANK CONTINUOUS TREATMENT OF STORMWATER RUNOFFÂ
Material:
continuous treatment of stormwater runoff consisting of LLDPE modular tank, one-piece structure, with PVC inlet and outlet pipes and NBR rubber gaskets, including flow splitting chamber, grit and oil separators with coalescing filters sized according to UNI-EN858-1 and complying with requirements of Reg. Lombardia L.R. 27 maggio 1985 n. 62.
Application:
The plant allows the continuous treatment of stormwater runoff from impermeable surfaces up to 10000 m2 used for transit or parking in industrial areas, residential zones and service stations subject to possible pollution from mineral 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 40 l/s. Runoff from impermeable transit areas must be carried to the treatment system. The treatment tanks receive the flow appartaining to first 5 mm of rain falling over a 15 minute period. For higher flows, the bypass is activated which sends the excess to the stormwater storage tanks. The treatment plant consists of a grit separator and an oil separator with coalescing filter, thus ensuring that the final effluent possesses the appropriate characteristics for discharge to a body of surface water.
Use and maintenance:
the grit, oils and other light liquids transported by stormwater runoff accumulate inside the tanks during the normal exercise of the plant. These accumulations become excessive over time and tend to affect the efficiency of the purification. For this reason, it is essential to carry out periodic inspections of the tanks and, if necessary, proceed with purging and cleaning. The frequency of such operations depends on the pollutant load of the effluent. As regards the coalescing filter, it is necessary to pull it out periodically and wash it with a strong jet of water. The purging must be carried out by competent and authorized companies as the effluent is considered hazardous waste and must be treated as such.
Installation:
please strictly follow the “installation instructions” provided by ROTOTEC.
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