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WELL SOLUTIONS |
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It
would be nice if all wells delivered sparkling clear, good tasting water
straight from the ground. Unfortunately, many wells contain naturally occurring minerals that can cause the following: · Reddish or orange stains on plumbing and fixtures. · Black or gray stains on fixtures. · Premature plugging of pumps and water treatment equipment. · Metallic, iron taste in water.
Treat Problem Water With B&B Dry Pellet Chlorinators.
Advantages of B&B Chlorinators
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A dry pellet chlorinator is a device that mounts on the well and drops a compressed chlorine tablet down the well shaft into the well water. It is wired into the pump's electrical circuit and run whenever the pump is pumping water, metering chlorine in proportion to water usage. An adjustment mechanism accounts for variations in pump sizes and water quality. As the pellet sinks to the bottom of the well and dissolves in the water, it releases chlorine that reacts with contaminants in the well. |
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Hydrogen
Sulfide Bacteria |
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Hydrogen Sulfide Bacteria
Hydrogen Sulfide is a by-product of
a sulfur-feeding bacteria and is noted by its distinct smell. Rotten egg,
sulfur, and sewer gas are common descriptions. It is also accompanied by black
slimy build up that can cause many of the same problems as iron bacteria.
Iron Bacteria
Iron Bacteria is most noticeable by the slimy red coating
it leaves in the water system. Severe cases can plug pumps and pipes, increase
operating costs, and lead to premature pump failure. Low water pressure is a
common symptom of severely plugged pumps and pipes. Water-conditioning equipment
(softeners, filters) can become plugged easily, leading to frequent service
calls and inconsistent operation. Stains on porcelain fixtures, (i.e. tubs,
showers stalls, etc.) are common. On the farm, waterers can be coated with a red
or black slime, which can discourage livestock from drinking and promote more
bacteria growth.
Manganese
Manganese is characterized by black to grayish deposits, or
black water with a metallic taste. Chemically, its treatment is similar to iron.
Manganese appears in the same forms and exhibits the same problems. While not as
common as iron, it will show up at much lower levels: .05 ppm is enough to cause
problems. Dissolved manganese is slower to oxidize than iron so early
chlorination is helpful. Unlike iron, any build ups in pipes are difficult to
remove, so ignoring the problem can lead to more expense in the future.
Coliform Bacteria
Coliform bacteria si the standard used in well testing.
Coliform is present in many warm-blooded animals as a normal part of the
digestive tract. Its presence in a water supply is an indication that animal or
human waste is making its way into a water supply. Coliform bacteria has no
detectable smell or taste. The coliform itself may not be a problem, but is an
indicator that other pathogenic bacteria may be present. These bacteria can
cause disease such as typhoid, cholera, hepatitis, giardiasis, and dysentery.
Although these are common in many underdeveloped countries, the lack of these
diseases in the United States is largely attributed to the chlorinated water
supply.
Because chlorine is a sanitizer, it will kill these bacteria id applied
properly. In laboratory conditions, chlorine at 1ppm residual takes 20 minutes
contact time to achieve 100% kill of coliform bacteria. If the bacteria is
exposed for less time or at lower levels, it may still be present when the water
is consumed. By dropping dry pellets into the well, treatment is started at the
earliest possible time, and in most cases, the 20-minute mark will be met.
Testing is the only way to confirm the effectiveness of chlorination. If
bacteria is still present, a higher level of chlorine or more retention time
through the addition of holding tanks may be necessary.
Iron
Because 5% of the earth's crust is
iron, it is no surprise that many wells contain it in various amounts. It takes
just a trace of iron to cause problems: as little as .2ppm can stain plumbing,
fixtures, and laundry. In larger amounts, water can become rust colored and have
a metallic taste. Iron can coat the insides of pipes with hard, red scale, which
reduces flow rates and plugs filter screens.
Because iron is found in different forms the treatment can vary.
· Ferrous iron is dissolved and appears clear out of the tap. At lower levels, it can be removed by ion exchange (water softening), but if iron bleed through occurs(red stains, rusty water, etc.), it may have to be oxidized and filtered
· Ferric iron is oxidized (precipitated) and appears red out of the tap. It consists of particles in the 30- to 50- micron range and will pass through most water softeners. An iron filter will probably be needed.
· Heme iron is iron bound up with organic material (often referred to as tannins). It needs to be oxidized by chlorine to destroy the bond between the organic material and iron to precipitate the iron out of the solution.
· Iron bacteria needs to be sanitized and the precipitated iron filtered.
Ferrous iron and iron bacteria occur
most often. By pre-treating with Dry Pellet Chlorination, the different types
of iron can be converted to ferric which can be filtered. Adequate contact
time is necessary, since the iron may not precipitate immediately, especially if
it is bound up with tannins or iron bacteria. Generally, 30 minutes are thought
to be sufficient. Over time, continuous chlorination will remove built up iron
deposits from plumbing.
Algae and Pond Scum
Shallow wells and water drawn from ponds may be contaminated with surface
runoff and biological debris from both plants and animals. Ponds are
particularly prone to this since they contain numerous forms of life that can be
drawn easily into the pump. These contaminants can be filtered out physically,
but the water should be sanitized for human or livestock consumption and for
aesthetic and health reasons. Whether they are pathogenic or not can be
determined only by a test, but these types of water sources are subject to many
variables affecting their quality.
This water can be used for residential water supplies. Many cities use water from lakes, rivers, reservoirs, and shallow wells. But like in the cities, this water should be chlorinated and filtered.
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