Improper cooling tower filtration can lead to serious illnesses.

Earlier this year, a woman living in the Washington Heights area of New York City filed a lawsuit against the Sugar Hill Project, the impressive $84 million subsidized housing building located in nearby Harlem. Completed in 2014, the mixed-use facility was designed to be an affordable living space for one of New York’s poorest communities, yet the development had one major issue that belied its high-minded, revitalization goals: it was getting people sick. 

Last summer, more than 50 people in the surrounding area were hospitalized resulting in 2 fatalities, all related to Legionnaire’s Disease. The outbreak was connected to the housing project’s cooling tower, which has since been shut down. If not properly filtered, cooling towers can instigate microbiological growth that can lead to health problems, such as those caused by Legionella.  

As an integral component of many cooling systems, cooling towers are typically used in industrial applications and in large commercial buildings to extract heat from a process or building system through evaporative cooling. Cooling tower systems operate most efficiently when their heat transfer surfaces are clean, but by design, require a large air-water interface to obtain this cooling and thus the system is subject to four major water treatment concerns: corrosion, scaling, fouling and microbiological activity. 

As waterborne deposits collect, they reduce heat transfer efficiency which can be very costly. Traditionally, the deposits are controlled by system blowdown, which increases wastewater discharge as well as concerns about water usage due to drought and environmental threat. As a result, cooling towers are being operated at higher contaminant concentrations, which only compound the problem. 

Addressing it involves full flow and side stream filtration. Filtration reduces blowdown, energy consumption and the kinds of fouling that leads to harmful microbial growth. Full flow filtration uses a filter installed after the cooling tower on the discharge side of the pump and is designed to continuously filter all of the recirculating system water. Side stream filtration continuously filters a percentage of the flow which significantly reduces system footprint, capital investment and operational cost — all very important considerations for affordable housing budgets. Additionally, these systems can be cleaned offline without shutting things down, eliminating the need for planned downtime. 

There is an array of filtration technologies available in the market, but few achieve adequate efficiencies. Screens require frequent backwash which increases water discharge. Hydroclones suspend solids through centrifugal force which can leave smaller particles behind. Sand filters can offload sand into the system. Bag filters have limited surface area, requiring large vessels to address flow requirements. All address some of the costs associated with inefficient cooling tower filtration, but in many cases introduce new ones.

Cartridge filters, on the other hand, address all costs: environmental, operating and health. They’re a disposable medium that exists in both non-pleated (lower cost, generally lower efficiencies) and pleated designs (high surface area) and offer high retention down to sub-micron levels, thus effectively addressing bio-burden issues. Some newer designs in the market such as large diameter offer further improvements in flow rates while reducing operating costs. 

In March, the New York City Council voted to reform the city’s cooling tower inspection protocol requiring the city’s Department of Buildings and Department of Health to present an annual report of cooling tower inspection results to the city council and post the results online. Cartridge filtration could play a critical role in those results, as well as the well-being of the surrounding Harlem and Washington Heights communities. The entire story is yet to be told, but it deserves a happy ending. Especially when one considers that the Sugar Hill Project has been designed with a Children’s Museum of Art and Storytelling at its base. 

GERM AFRICA HEADLINES

Improper cooling tower filtration can lead to serious illnesses.

Earlier this year, a woman living in the Washington Heights area of New York City filed a lawsuit against the Sugar Hill Project, the impressive $84 million subsidized housing building located in nearby Harlem. Completed in 2014, the mixed-use facility was designed to be an affordable living space for one of New York’s poorest communities, yet the development had one major issue that belied its high-minded, revitalization goals: it was getting people sick. 

Last summer, more than 50 people in the surrounding area were hospitalized resulting in 2 fatalities, all related to Legionnaire’s Disease. The outbreak was connected to the housing project’s cooling tower, which has since been shut down. If not properly filtered, cooling towers can instigate microbiological growth that can lead to health problems, such as those caused by Legionella.  

As an integral component of many cooling systems, cooling towers are typically used in industrial applications and in large commercial buildings to extract heat from a process or building system through evaporative cooling. Cooling tower systems operate most efficiently when their heat transfer surfaces are clean, but by design, require a large air-water interface to obtain this cooling and thus the system is subject to four major water treatment concerns: corrosion, scaling, fouling and microbiological activity. 

As waterborne deposits collect, they reduce heat transfer efficiency which can be very costly. Traditionally, the deposits are controlled by system blowdown, which increases wastewater discharge as well as concerns about water usage due to drought and environmental threat. As a result, cooling towers are being operated at higher contaminant concentrations, which only compound the problem. 

Addressing it involves full flow and side stream filtration. Filtration reduces blowdown, energy consumption and the kinds of fouling that leads to harmful microbial growth. Full flow filtration uses a filter installed after the cooling tower on the discharge side of the pump and is designed to continuously filter all of the recirculating system water. Side stream filtration continuously filters a percentage of the flow which significantly reduces system footprint, capital investment and operational cost — all very important considerations for affordable housing budgets. Additionally, these systems can be cleaned offline without shutting things down, eliminating the need for planned downtime. 

There is an array of filtration technologies available in the market, but few achieve adequate efficiencies. Screens require frequent backwash which increases water discharge. Hydroclones suspend solids through centrifugal force which can leave smaller particles behind. Sand filters can offload sand into the system. Bag filters have limited surface area, requiring large vessels to address flow requirements. All address some of the costs associated with inefficient cooling tower filtration, but in many cases introduce new ones.

Cartridge filters, on the other hand, address all costs: environmental, operating and health. They’re a disposable medium that exists in both non-pleated (lower cost, generally lower efficiencies) and pleated designs (high surface area) and offer high retention down to sub-micron levels, thus effectively addressing bio-burden issues. Some newer designs in the market such as large diameter offer further improvements in flow rates while reducing operating costs. 

In March, the New York City Council voted to reform the city’s cooling tower inspection protocol requiring the city’s Department of Buildings and Department of Health to present an annual report of cooling tower inspection results to the city council and post the results online. Cartridge filtration could play a critical role in those results, as well as the well-being of the surrounding Harlem and Washington Heights communities. The entire story is yet to be told, but it deserves a happy ending. Especially when one considers that the Sugar Hill Project has been designed with a Children’s Museum of Art and Storytelling at its base. 

Improper cooling tower filtration can lead to serious illnesses.

Earlier this year, a woman living in the Washington Heights area of New York City filed a lawsuit against the Sugar Hill Project, the impressive $84 million subsidized housing building located in nearby Harlem. Completed in 2014, the mixed-use facility was designed to be an affordable living space for one of New York’s poorest communities, yet […]

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GERM AFRICA HEADLINES

Improper cooling tower filtration can lead to serious illnesses. GERM AFRICA HEADLINES NUCLEAR GRADE RESINS CENTURIO TOWER MXL DOSERS Combined Cycle Power Generation Graver Technologies’ specialty mixed bed resin, Gravex GC-3-1 SC PRISMA Dosing Pump NANODEX Ion Exchange Filter Papers AX|100, CX|200 Aegis®DualGuard I® Condensate Polishing Septa Tweets by GermAfrica https://www.instagram.com/germafrica/ View this post on […]

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NUCLEAR GRADE RESINS

Gravex® is a complete product line of high-purity, quality-certified cation, anion and mixed bed ion exchange resins. These custom-blended bead resins are the cleanest bead available, washed and classified, every batch tested and samples filed for future reference. They are processed to meet nuclear specifications. We offer the most conclusive results available for nuclide removal […]

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CENTURIO TOWER

CENTURIO TOWER is the control instrument in cooling tower water treatment, with the ease and safety of operation you need and with the stylish box designed by Giugiaro Design. CENTURIO is equipped with a Linux operating system, a high performanceARM A5 microprocessor, a large, touchscreen, colour display, in order to give you total and simultaneous […]

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MXL DOSERS

WATER POWERED DOSING PUMPS FOR LIVESTOCK BREEDING Mixtron dosers, specific to the livestock industry, were designed and perfected by technicians and veterinarians specialised in livestock and substance dosage and preparation (vitamins, antibiotics, probiotics, minerals, vaccines) to guarantee health and correct development and growth. Mixtron dosers are equipped with safety systems designed to alert the user […]

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Combined Cycle Power Generation

Condensate polishing (CP) is an essential component of combined cycle plant design and operation because high purity condensate maximizes uptime. CP safeguards high-value plant assets by reducing startup/downtime, stabilizing cycle chemistry, minimizing corrosion transport and optimizing operations. CP is particularly important for air-cooled condenser (ACC) systems, once through steam generators and plants with frequent startups. […]

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Graver Technologies’ specialty mixed bed resin, Gravex GC-3-1 SC

Stator cooling water is one of the most critical systems in a power generating plant. The copper stator bars are cooled in this closed loop system to prevent overheating and reduced generator performance. A mixed bed ion exchange polisher continuously treats the recycling water to remove ionic contaminants while providing some filtration of particulates, generally […]

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EMEC dosing Pumps

PRISMA Dosing Pump

PRISMA dosing pumps: the incomparable accuracy of the stepper motor – EMEC. EMEC is proud to introduce the new stepper motor-driven dosing pump PRISMA, the best solution for offering high-accuracy metering and extreme reliability. Thanks to the new stepper motor and to the MultiFunction software, PRISMA dosing pumps offer complete control over dosing speeds and […]

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Aegis®DualGuard I® Condensate Polishing Septa

Graver Technologies DualGuard elements are engineered for systems that require a uniform precoat on the outer surface of the septa, providing an effective removal of iron oxide particles while still allowing for an effective backwash. The all polypropylene constructed element has two distinct zones. The outer zone is a multi-string wound surface ideal for precoating in […]

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https://www.instagram.com/germafrica/

NUCLEAR GRADE RESINS

Gravex® is a complete product line of high-purity, quality-certified cation, anion and mixed bed ion exchange resins.

These custom-blended bead resins are the cleanest bead available, washed and classified, every batch tested and samples filed for future reference.

They are processed to meet nuclear specifications. We offer the most conclusive results available for nuclide removal products. Graver Technologies also supplies bead resin manufactured by Dow, Rohm & Haas and Lanxess (Bayer).

These Gravex Nuclear Grade Ion exchange resins are very high capacity polystyrene, gel type resins. They have been regenerated and processed to provide the highest possible performance in nuclear applications. The Gravex cation is specially processed to minimize leachable sulfonic acids.

Its high capacity and oxidative stability help achieve optimal performance. Gravex mixed beds are the most uniformly blended products available and have the same consistent cation to anion ratio in every package. Our unique blending process creates the less separable GR-3-16 NG stoichiometric mixed bed. A 7Li+ form cation is available as GR-7-16 NG and in the GR-4-7 NG mixed bed.

Proven Technology for the Most Challenging Separations

CENTURIO TOWER

CENTURIO TOWER is the control instrument in cooling tower water
treatment, with the ease and safety of operation you need and with the stylish box designed by Giugiaro Design.

CENTURIO is equipped with a Linux operating system, a high performance
ARM A5 microprocessor, a large, touchscreen, colour display, in order to give you total and simultaneous control.

  • Parameters: conductivity, chlorine, pH, ORP, tracers, inductive conductivity, mA Input.
  • 5 channels to combine
  • Real-time graphs
  • Permanent data storage with system log
  • USB Download
  • Data import/export (backup & restore) via USB port to other CENTURIO.
  • Internet connection (WIFI, 3G or LAN), configuration and control by ERMES web app using PC, smartphone or tablet with any browser.
  • MODBUS serial communication to be connected to other devices on RS485 networks and TCP/IP MODBUS.

The “CENTURIO Tower” is a fully featured cooling towers controller with two-way biocide options and inhibitor / bleed control with 5 channels.

Cooling towers are heat removal devices used to transfer process waste heat to the atmosphere. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or rely solely on air to cool the working fluid to near the dry-bulb air temperature.

Common applications include cooling the circulating water used in oil refineries, chemical plants, power plants and building cooling.
All information is provided through a large COLOUR LCD display (480×272). “CENTURIO Tower” is housed in an IP65 plastic box.

MXL DOSERS

WATER POWERED DOSING PUMPS FOR LIVESTOCK BREEDING

Mixtron dosers, specific to the livestock industry, were designed and perfected by technicians and veterinarians specialised in livestock and substance dosage and preparation (vitamins, antibiotics, probiotics, minerals, vaccines) to guarantee health and correct development and growth.

Mixtron dosers are equipped with safety systems designed to alert the user when the working temperature reaches levels that could jeopardise correct operations.

Any breeder knows how important correct and constant doser percentages are for their livestock’s’ well-being. With our products, we are able to provide technical and innovative solutions that guarantee maximum dosing precision in any conditions of use and installation.

Combined Cycle Power Generation

Condensate polishing (CP) is an essential component of combined cycle plant design and operation because high purity condensate maximizes uptime. CP safeguards high-value plant assets by reducing startup/downtime, stabilizing cycle chemistry, minimizing corrosion transport and optimizing operations.

CP is particularly important for air-cooled condenser (ACC) systems, once through steam generators and plants with frequent startups. Utilities can’t afford to ignore this vital and economical system that consumes a tiny portion – typically 1% – of plant construction budgets.Electric generating station condensate must be maintained at a very high purity level to protect boilers, steam generators, reactors, and turbines from corrosion.

To remove contaminants from the condensate, deep bed ion exchange condensate polishers are used and sometimes preceded by a Powdex® filter demineralizer or a fine particulate filtration system. A Powdex system can also stand alone as the primary polisher. Graver Technologies is the most experienced and knowledgeable Ion Exchange product and Filter Septum manufacturer and offers the most complete range of products to meet today’s challenges.

Whether the need is for high purity condensate polishing bead or powdered ion exchange resins or filter elements specially designed for condensate polishing, Graver Technologies has the answer for your application.

Graver Technologies’ specialty mixed bed resin, Gravex GC-3-1 SC

Stator cooling water is one of the most critical systems in a power generating plant. The copper stator bars are cooled in this closed loop system to prevent overheating and reduced generator performance.

A mixed bed ion exchange polisher continuously treats the recycling water to remove ionic contaminants while providing some filtration of particulates, generally copper oxides.Graver Technologies has the optimum mixed bed product, Gravex GC-3-1 SC, for your stator cooling system.

Features

  • Premium grade mixed bed ion exchange polishing resin
  • High capacity strong acid cation and strong base anion components for longest possible run
  • Only mixed bed product that meets General Electric’s stringent requirements for stator cooling mixed beds, GE spec A50A306, Rev. S-8
  • Specially packaged in durable polyethylene-lined one cubic foot fiber drums

Properties and specifications


Resin Type
Strongly Acidic Cation Exchange Resin
Strongly Basic Anion Exchange Resin
FunctionalitySulfonic Acid
Quaternary Ammonium
Matrix Styrene-Divinylbenzene
Cation: Anion Ratio1:1 Equivalents
Total Exchange Capacity 1.90 meq/mL (Cation H Form) (min)
1.25 meq/mL (Anion OH Form) (min)
Percent of Sites 98% Hydrogen (min)
95% Hydroxide (min)
Water Retention Capacity45 – 51% (Cation H Form)
42 – 49% (Anion Cl Form)
Whole Bead 99.5% (min)
EMEC dosing Pumps

PRISMA Dosing Pump

PRISMA dosing pumps: the incomparable accuracy of the stepper motor – EMEC.

EMEC is proud to introduce the new stepper motor-driven dosing pump PRISMA, the best solution for offering high-accuracy metering and extreme reliability.

Thanks to the new stepper motor and to the MultiFunction software, PRISMA dosing pumps offer complete control over dosing speeds and working modes as well as great flexibility and repeatability, meeting even particularly complex application needs.

PRISMA is also equipped with Level control, Alarms and Stand-by, while available working modes include Constant, Constant with external input, ppm, %, mlq, Pause-work, Weekly, mA, Pulse, Volt, external Batch and manual Batch.

PRISMA dosing pumps feature the Encoder control knob for quickly browsing through the configuration menus. And a large display to easily control and regulate the working parameters. By changing background colors PRISMA backlight display is capable of signaling different working status: pump running (green); stand-by (white); warning condition (yellow); alarm condition (red).

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TURNDOWN

PRISMA stepper motor-driven pumps give you the most accurate control over the stroke speed, providing an outstanding turndown ratio of up to 4800:1.

It means PRISMA, through its digital multifunction control, can split up the dosing process into a maximum of 4800 steps in order to offer the most homogeneous and precise distribution of the product to dose according to the required application.

SLOW MODE

The extreme versatility of PRISMA dosing pumps is also due to Slow Mode function. With Slow Mode enabled you can reduce the suction speed to 75, 50 or 25% of the normal speed, making easier, more reliable and extremely accurate the priming and the dosing, even when you have to handle particularly viscous liquids.

CAPACITY RANGE

PRISMA stepper motor-driven pumps are available with dosing capacity of 5, 13, 28 and 80 l/h at a working pressure of 20, 10, 5 and 2 bar, respectively.

NANODEX Ion Exchange Filter Papers AX|100, CX|200

P o w e r G e n e r a t i o n S y s t e m s – T h e R i g h t  R e s i n  C h o i c e

Radionuclides and Corrosion Products are captured by these novel ion exchange filter papers, allowing plant personnel to track system and plant performance. Individual, highly functionalized, strongly basic anion and strongly acidic cation exchange papers are produced by a unique patented technology.

This technology achieves very fast ion exchange kinetics and provides the highest available ion exchange capacity per disk. The high performance papers fit all standard 47mm diameter filter holders and are durable, easy to handle, and simple to use.

AX|100

  • Anion exchange filter disks in the chloride form – convert to desired ionic form (i.e. hydroxide) as required
  • Strongly basic, quaternary ammonium functionality
  • Measure iodide and other anionic radionuclides and anions
  • Fifty, 47mm diameter disks per box – 10 disks per sealed polyethylene bag

CX|200

  • Cation exchange filter disks in the hydrogen form
  • Strongly acidic, sulfonic acid functionality
  • Measure corrosion products and other cations and cationic radionuclides
  • One hundred, 47mm disks per box – 10 disks per sealed polyethylene bag

RECOMMENDED OPERATING CONDITIONS

FEATURES

  • High performance, specialty hydrophilic paper for a variety of analytical requirements
  • Uniform resin distribution throughout each disk
  • Standard 47mm diameter
  • Highly functionalized, highest ion exchange capacity analytical filter disks available
  • Filter disks are easily digested by standard analytical methods 

BENEFITS

  • Excellent hydraulic characteristics
  • Consistent ion exchange capacity and utilization
  • Fit standard bench-top and inline filter holders and housings
  • Single disk used per test
  • Simple to quantify ions removed

Aegis®DualGuard I® Condensate Polishing Septa

Graver Technologies DualGuard elements are engineered for systems that require a uniform precoat on the outer surface of the septa, providing an effective removal of iron oxide particles while still allowing for an effective backwash.

The all polypropylene constructed element has two distinct zones. The outer zone is a multi-string wound surface ideal for precoating in either a thin or a full layer resin precoat and the inner zone is a pleated polypropylene with a fixed pore media. The inner pleated filter media is available in a variety of micron grades to meet specific requirements of the condensate system. The element is available in most end cap connections.

  • The optimum precoat surface allows for the distribution and sustainability of an evenly thin layer precoat for optimum performance
  • Precoatable with a full or thin layer of powdered resin
  • Available in various outside diameters
  • Fixed pore construction eliminates dirt unloading as differential pressure increases
  • High surface area of pleated media
  • Removal efficiency rated