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What is Backwash?
Backwash is a process that allows the flow of water to be
sent back through the filtration media in order to refresh
the filter by knocking loose accumulated dirt and debris leaving
the media clean and ready for further use. The filter unit
is backwashed with chlorinated water upon shut down (filling
the reservoir) to maintain a clean, disinfected filter and
to prevent short circuiting or bacteriological growth in the
filtration system.
The system is programmed to backwash automatically based
on filtration time, a differential pressure override and upon
filling the resevoir or satisfying the demand for water. Filtronics
Electromedia® backwash cycles have a four minute duration.
Backwash water can be disposed of directly into the sewer
system or into a backwash reclaim system.
What is a Backwash Reclaim system?
 Water
used for purge and backwash is run through a reclaim tank
to allow for the treatment residuals from backwash to sink
to the bottom of the tank, allowing the supernatant to be
recycled.
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Any time the water level is above the reclaim start level set
point the reclaim timer begins its cycle. The reclaim timer cycle
allows the residuals to settle.
The average settling time is 20 to 60 minutes. |
 At
the end of the timing cycle, the reclaim pump is started by the
Filter Control Panel. The reclaim pump will only start when the
filter is in filtration and the well pump is running.
The water is “reclaimed” back through the filtration
system to be useable water.
Multiple pumps or variable speed pumps are used for multiple
well and filter applications. |
|  The
residuals are stored in the bottom of the reclaim tank. Periodically,
the reclaim tank is drained to the sanitary sewer, drying bed,
or hauled off.
More than 99% of the water used for backwash
and purge is recycled using the reclaim system. |
Cost Benefits of a Backwash Reclaim system.
A backwash reclaim system allows you to reclaim more than
99% of your backwashed water resulting in:
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Lower Electricity/Pump Costs - If you are a pumping water
out of a well, reclaiming backwashed water lets you save
valuable additional pump costs.
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Lower Sewage Costs - Rather than paying high sewage costs
to dispose backwashed water, backwash reclaim reduces the
amount of residuals to be dumped. In some cases, it can be
dried and hauled off to a land fill for regeneration into
the earth.
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Water Cost Savings - In ALL instances, you are reclaiming
99% of the backwashed water, resulting in maximized water
production & lower water costs.
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Environmental Savings - Minimal waste discharge means maximum
savings for our environment.
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To take advantage of our quality backwash reclaim engineering
ask your Filtronics rep today or email
for more information.
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