The MosT ADVANCED NaMe iN WaTer MaNageMeNT soluTioNsTM
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Stormwater treatment has unique requirements, which
often require the treatment of large volumes of water at
relatively high flow rates to high levels of pollutant removal
with long periods of time between maintenance intervals.
At BaySaver we believe it is our responsibility to engineer
a balance within these variables to provide effective
stormwater treatment at an exceptional value to our clients.
What makes for an effective and efficient stormwater filter?
A filter must be able to remove the pollutants of concern
and function for a reasonable period of time as defined by
industry and regulatory standards. A filter system should also
be designed to limit re-suspension or release of pollutants
that have been collected between maintenance periods.
The traditional pollutants of concern in stormwater is
sediment. Phosphorous, metals, turbidity, nitrogen, fecal
coliform, and bacteria are also pollutants of concern although
they are not commonly regulated nationwide. BaySaver
Technologies has completed both field and laboratory testing
of the BayFilter. Testing demonstrates BayFilter’s effectiveness
and efficiency at capturing the pollutants listed above.
Settling and filtration are the two primary methods to
remove pollutants from stormwater. Some settling of
particles and pollutants occurs as the influent enters the
filter vault. Settling typically removes the larger particles
and debris, it does not remove the small particles or any
dissolved materials. It is the filter which performs the
work of removing the very small particles, and dissolved
nutrients and metals. The media within a filter must be small
enough to intercept the tiny sediment particles which won’t
settle (fig. 1), and be capable of attracting and attaching
charged and elemental particles through ion exchange.
The area of media provided by a stormwater filter is an
important factor to consider when selecting and specifying a
filter system. The more surface area provided by the media,
the greater the potential flow through and across the media
and the greater the pollutant removal potential of the filter.
The vertically oriented and patented compound spiral media
BASIC PRINCIPLES OF STORMWATER FILTRATION
Figure 1: Coarse Industry Media
Figure 2: BayFilter Media
