Hello,
Looking for
recommendations for my client's well. This is used for irrigation only, in
Northern California. A well head approximately 400' deep pumps 5gpm to a 10,000
gallon cistern tank to hold water for irrigation. I noticed a slight odor to
water and there is a black/green algae slime in some of the pipes. Thanks in
advance for your time.
Sam
Sam,
Thank you for contacting
us. One very effective way
to treat this water is to inject a small amount of chlorine, then filter it
with a MangOX iron filter and fill the storage tank with clean water. See
the diagram below:
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The MangOX filter can
filter at 5 gallons per minute, but requires 15 gpm for a short backwash once a
day. The system is set up to backwash with the clean water from the
storage tank booster pump. The backwash water would need to go to the
sewer, or into a leach field as it would be very rusty water. During
backwash: the well pump would shut down, a solenoid valve after the filter
would close to prevent water from entering the storage tank during backwash,
and a valve would open to allow clean water in from the booster pump to
backwash the filter.
The result would be
disinfected, clean, odor-free, iron-free water with no slime or algae.
The small amount of chlorine present would be less than the amount found in city water, and have no effect
on the plants or landscaping.
Here is more
information on these systems:
Chlorination and the
Stenner Pump Chlorinator System
Chlorine is a low-cost and safe method of eliminating odors and bacteria, and
it works great at oxidizing iron, manganese, and other contaminants in water so
they can be filtered out.
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Although there are other ways to eliminate microorganisms and odors in water,
chlorination is the most commonly used because it is low-cost and
effective. Often combined with filtration, chlorination is an excellent
and cost-effective way to disinfect drinking water supplies, eliminate odors,
and oxidize iron and other metals.
For easy and accurate chlorine injection we recommend a Stenner Pump and
solution tank system. The Stenner pump uses liquid chlorine bleach. The
system is reliable, easy to install, and very easy to use. It can be adjusted
to get just the right amount of chlorine needed for the application.
The chlorinator can be adjusted so the chlorine levels are very low in the
household (similar to city water) or a low cost carbon filter can be installed
to remove any trace of chlorine tastes and odors.
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Contact Tank
Contact tanks provide optimal contact time after chlorine, soda ash, peroxide or
other water treatment grade chemicals have been injected into the water. With a contact tank you can inject less solution and ensure that
the solution being injected is thoroughly mixed and dissolved in the
water.
These WellMate Contact Tanks are made of a seamless inner shell of molded
polyethylene and are impact and corrosion resistant. The tanks are high
quality NSF/ANSI 61 certified tanks for drinking water. Inlet and outlet
connections are 1-1/4” but can be reduced to 1” or ¾” if needed.
MangOX
Iron Filter
The MangOX Iron Filter is a powerful and effective system for
removing iron and manganese from well water. This system automatically removes
iron, manganese, and sediment without the use of filter cartridges or
chemicals. The iron filter is easy to install by any plumber or person familiar
with basic plumbing.
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MangOX Iron Filter 7000-SXT 2.5 CF
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The MangOX Iron Filter removes both dissolved and oxidized iron
and manganese by using a special type of solid manganese oxide media which
traps the iron and then automatically backwashes out the trapped rust and
sediment to drain.
The backwash lasts for
approximately 15 minutes and takes place automatically, typically every 2 - 3
days, in the middle of the night when no water is being used.
An optional chlorine solution tank is available to backwash the
MangOX filter media with a chlorine rinse, which kills iron bacteria and can
extend the life of the MangOX media for many years. For waters
containing “rotten egg odors” (hydrogen sulfide), a chlorine feed ahead of the
MangOX filter can be used to kill the odor and keep the MangOX media working efficiently.
Unlike many residential and small commercial iron filters, the
MangOX 7000 system will not restrict flow rate or cut down on water pressure in
the home. The system uses a high quality Vortech filter tank which requires
less backwash water, saving water and energy.
Unlike the media inside
the Greensand and Birm iron filters, which generally must be changed every 3 to 5
years, the MangOX media lasts for more than 10 years.
