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Managementul Calitatii Apei in Rezervoare
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:
  1. Mixing in order to achieve a homogenous solution.
  2. Mixing to eliminate temperature stratification.
  3. Sampling of mixed water and chlorine residual analysis.
  4. Chemical injection directly within the flowing mixed water to allow for rechlorination and improved water quality.

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:
  1. 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.
  2. This upward flow of water not only provides axial thrust, but also provides a rotational characteristic to the upward flowing stream.
  3. 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.
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:
  1. Suspension of the nozzle assembly from the reservoir roof near an access hatch.
  2. Direct submersion of the weighted Tank Shark frame into the reservoir, which also allows for remote placement and retrieval.

Suspension Tank Shark

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.

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.