Purification Step 1: Gravity Separation
The sediment and solids, pre-treated run-off is gravity fed
or pumped (typically with a positive displacement or
diaphragm type pump) to the gravity separator through a
submerged inlet pipe.
The separation process relies on the fact, that light fluids
have a lower specific gravity than water and thus float on
the water surface.
Purification Step 2: Coalescing Media
In the residual oil media, fine droplets, that are too small
to be separated by gravity alone are accumulated into bigger
drops that rise to the surface. This coalescing media is
made of reticular (i.e. "net-like") soft
polyurethane foam. The media-cartridge is very easy to lift
out and reinstall once it is cleaned/rinsed with a
garden hose. The separated water that leaves the Ecotop
has a residual contamination of free petroleum content to
less than 5 ppm.
Automatic oil draw-off device:
The system includes an automatic draw-off device (ADD)
for maximum environmental protection. The light fluids
are constantly being removed from the water surface and
collected in an integrated or external oil recipient. No
stable emulsions can be formed. A large amount of the
separated light liquid can be recovered without any interrupting
the collection cycle of the Ecotop. The automatic
drawoff device will collect the pure petroleum product,
and not an oil-water mixture. The costly disposal of large
quantities of oil and water mixtures is then eliminated.
Facilities that have the ADD actually are paid by waste oil
companies that service their Ecotop systems.
Ecotop‘s fields of application:
- Gasoline stations, car wash and repair workshops
- Industrial process waste water
- Oil production, oil-removal plants
- Reconditioning of cooling water
- Mobile cleaning of oil-contaminated ground water