megavideolinks
Joined: 19 Nov 2011
Posts: 273
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 Posted: Thu Dec 08, 2011 6:46 am Post subject: OilWater Separators and hydrodynamic separators |
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are widely used for storm water treatment.
Hydrodynamic separators are flow-through structures with a settling or separation unit to remove
sediments and other pollutants. No outside power source is required, because the energy of the flowing
water allows the sediments to efficiently separate. Depending on the type of unit, this separation may be
by means of swirl action or indirect filtration. Considerations include:
? Most effective where the materials to be removed from runoff are heavy particulates -
which can be settled, or floatables, which can be captured, rather than solids with poor
ability to settle or dissolved pollutants (e.g. water soluble cutting oils).
? Available in wide size range and some can fit in conventional manholes.
? Maybe especially useful for %22hotspots%22 such as waste storage and handling areas.
? Visual inspections and adequate maintenance are integral to effectiveness.
Maintenance is not intensive because there are no moving parts, and the frequency of
required sump cleaning is site specific (i.e. the more sources of particulates in the
watershed will yield more buildup of sediment for disposal).
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