HYDROAUTOMATIC GRAVITY FILTER
The hydro-automatic gravity filter based on the polymer floating media is a
superior alternative to heavy media filters in water treatment applications.
The two most important advantages of the hydro-automatic gravity filter
are the floating capacity of the filtering media and the hydro-automatic
backwash function, which bring along both an improvement of the overall
working characteristics of the system and a significant reduction in
capital, operational and maintenance costs.
Specific physical properties of the polymer
floating filtering media (PFFM) made it possible to prolong the
filtration cycle and to considerably reduce duration of the backwash
process, thus bringing losses of treated water to the minimum.
The backwash process in units with polymer filtering media self-adjusts
to changing contaminants loads in feed water without any operator's
intervention. Therefore, the process produces stable and repetitive
results.
Quality backwash of polymer filtering media is achieved without use
of air and in a much shorter period comparing to sand media. During
the backwash, the filter bed is expanded by 30-70%, and the combination
of a downward gravity flow of water and upward movement of floating
media produce a vigorous agitation/scrubbing effect resulting in the
fast (up to 3 minutes) regeneration of the filtering media.
The polymer filtering media is chemically and physically stable, works
in a wide range of temperatures and pH, and is very easy to handle and
store.
The "automation" of the polymer media filtration process is based entirely
on gravity force and difference of water levels with no electronic or
moving parts involved. Therefore, the process is extremely reliable,
durable and virtually maintenance-free.
Absence of additional equipment (pumps, compressors, etc.) in the polymer
media filtration process leads to a small size of the filtration unit.
Furthermore, the filtration unit itself does not consume any electricity.
Electricity is supplied only to the feed pump (well pump in case of
ground water).
Hydro-automatic floating filters can be fabricated in non-specialised
conditions of an ordinary metal workshop. Only a few types of materials
are required: carbon steel sheet (or plastic sheet), carbon steel pipes,
metal or plastic net, reinforced round bar and carbon steel angle -
all of which are inexpensive and widely available. The process of fabrication
is very simple and straightforward, and does not require highly skilled
or specially trained labour. The small size and absence of electric
components also contribute into the appreciably low fabrication costs.
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Alex Remizov
E-mail: remizov@rivne.com
