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| The Tank Shark controls and
improves water chemistry and quality within large bodies of potable
or reuse water such as municipal water reservoirs. |
| Large water reservoirs are
prone to water quality problems as they are typically stagnant with
as little as one to two percent turnover per day. This lack of
turnover allows for biological re-growth, nitrification, and
temperature stratification. These factors can all compound to
produce a poor or even unhealthy water quality leading to consumer
complaints and related water quality issues within the distribution
system. |
The Tank Shark process has
four major functions within a large body of water:
- Mixing in order to achieve a homogenous solution.
- Mixing to eliminate temperature stratification.
- Sampling of mixed water and chlorine residual analysis.
- Chemical injection directly within the flowing mixed water to
allow for rechlorination and improved water quality.
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| The Tank Shark
apparatus utilizes one or more 15 GPM multiplicative eductor nozzles
placed within three to five feet of the base of the tank causing an
upward flow of water equal to approximately five times the nozzle
flow. |
This upward
flow of water causes mixing of the water volume in three distinct
ways:
- Direct addition of motive energy at the 15 GPM nozzle
utilizing a 50 PSI pressure differential. This nozzle energy is
converted into a 75 GPM upward flow.
- This upward flow of water not only provides axial thrust, but
also provides a rotational characteristic to the upward flowing
stream.
- The nozzle motive energy functions to move colder water from
the base of the reservoir up to and on top of the warmer
stratified layers. This thermal disruption causes additional
mixing beyond the energy associated with the nozzle itself.
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| If the
residual analysis determines deficiency in chlorine or ammonia
either or both chemicals are then injected into the 75 GPM upward
flowing stream of water for dilution and mixing within the tank
volume. |
| A sample line
is connected from the submerged apparatus to a rotary gear pump
located outside of the tank capable of drawing 0.25-0.75 GPM of
representative water from the tank. The sample is then driven to a
chlorine residual analyzer where a determination of water quality is
made on a continuous basis. |
| The Tank Shark
process is completely compatible with bulk and onsite generated
hypochlorite. When chloramine delivery is a requirement, aqueous
ammonia with PSI's proprietary chiller apparatus is the feedstock of
choice. |
The two
primary application scenarios for The Tank Shark are:
- Suspension of the nozzle assembly from the reservoir roof near
an access hatch.
- Direct submersion of the weighted Tank Shark frame into the
reservoir, which also allows for remote placement and retrieval.
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Suspension Tank
Shark
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Submersible Tank
Shark
|
| Each application scenario
will provide all of the intended benefits while the submersible
model allows for remote positioning of The Tank Shark via
pre-positioned anchors and stainless steel guide cables. |
| The Tank Shark mixing
apparatus can be utilized in several different formats consisting of
one or more nozzles located at strategic locations within the
reservoir. |
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| Unlike competitive
processes, The Tank Shark does not require pumps, motors, or electrical
supply within the reservoir itself. In addition, all submerged or
wetted components are NSF approved. |
