UV Technologies

UV Disinfection

UV Disinfection of Wastewater & Reuse Water

UV disinfection is popular around the globe for wastewater treatment and water reuse treatment largely due to the fact that, unlike chlorine, it doesn't increase effluent toxicity. Pressure from Governments and environmentalists to eliminate unwanted chemicals from the ecosystem, whilst providing pathogen free water, is also driving interest in UV disinfection  for wastewater treatment. This interest is leading to many wastewater and water reuse plants being converted from chlorine to UV disinfection. Water re-use is also becoming important, with purified wastewater disinfected by UV disinfection systems increasingly being used for irrigation. Berson is the leader in wastewater UV and reuse water treatment. 

 Find out more about the compact & energy efficient AmaLine UV system.

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Advantages Of UV Disinfection of Wastewater & Reuse Water

UV wastewater systems are a well established method of wastewater treatment  and reuse water treatment safeguarding public health and protecting wildlife. There are different types of wastewater, such as municipal sewage or industrial effluent, and these different wastewaters all have their own types of microbiological environment, microbiological counts, levels of suspended solids, UV transmission rates and temperatures. Depending on whether the effluent is to be discharged into rivers, lakes and seas or re-used for applications such as irrigation, the required microbiological counts are usually specified by local regulations.

The most common method of reuse water treatment has long been chlorination. Despite chlorine’s impressive track record, concerns regarding disinfection by-products (DBPs) and, more recently, disinfection performance with respect to pathogen inactivation, are driving the conversion from chlorine disinfection to other disinfection methods such as UV disinfection, which does not produce any DBPs.

Closed vessel UV wastewater disinfection systems are easy to install within existing pipework, so there is minimal disruption to plant operation. Day to day operation is simple and only minor maintenance is needed. The only regular requirement is changing the UV lamps and wiper rings once a year, a straightforward operation that can be carried out by on-site personnel.

UV wastewater systems are also validated to much higher doses than drinking water systems, according to protocols established by the National Water Research Institute (NWRI) in the USA. Drinking water type product validation, with the accompanying rigour, is emerging as the dominant method of assessing suitability for these critical applications. The ability to prevent photo repair is also key. 

Thousands of wastewater sites globally use UV systems for wastewater treatment. Berson UV wastewater systems are environmentally friendly with:
• Lower operational costs
• CFD design
• Bioassay validation
• Lowest number of lamps
• Smallest footprint and lowest headloss
• Highest medium pressure UV Lamp life with automatic wiping 

Berson UV was the first supplier in the world of closed pipe UV systems for wastewater treatment. Berson also invented the bersonInLine® concept, with all Berson InLine UV disinfection systems having the highest kill rate efficiency compared with power consumption. Berson UV also developed the Berson MultiWave® medium pressure lamp, which has a very high power consumption efficiency and which ensures no microbial no photo repair of UV-damaged DNA.

All Berson InLine UV systems are equipped with Berson MultiWave® lamps and have an optimised chamber design using CFD (Computational Fluid Dynamics) with low head loss. They are all very compact with a small footprint, making them easy to retrofit. Electronic ballasts (stepless power supplies) enable the units to compensate for any unforeseen lower transmissions or increase in flow rates and use up to 20% less power than other energy control methods. Berson automatic wipers keep the lamps clear of fouling and the advanced UVtronic control module provides data logging and is fully programmable.

Finally, the design of the Berson chambers forces the wastewater to pass perpendicularly to the UV lamps, meaning there are no 'blind spots'.

The temperature of wastewater has a significant influence on the choice of UV lamp. Medium pressure UV lamps, like the Berson MultiWave range, are not influenced by water temperature, while low pressure UV lamps have an optimum operating temperature of around 20°C, with a change in water temperature of only 5°C significantly influencing the lamp's performance. Medium pressure lamps should therefore always be used if large temperature fluctuations are expected.

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Berson InLine® UV disinfection systems

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Berson

Berson UV Disinfection systems are used around the globe in drinking water, wastewater and water reuse treatment plants. Berson's UV systems are validated to the most stringent third party approvals, including DVGW, USEPA, JWRC, NWRI and NSF.

Berson InLine UV System

Berson InLine UV Systems are in use worldwide and have been the best in UV for over 40 years. Berson have a strong focus on innovation, improving disinfection performance, system efficiency, maintenance friendliness and low total cost of ownership.

Berson is the first manufacturer to produce an 'in-line' UV unit with medium pressure lamps. The berson InLine® uses Berson MultiWave® lamps combining a wide spectrum of useful UV wavelengths with a very high energy output. This combination causes total and permanent deactivation of micro-organisms, avoiding photoreactivation.
The compact size and high energy output of the Berson MultiWave® lamps reduces the size of the irradiation chamber and quantity of lamps drastically. The "in-line" construction results in a very low headloss and small foot-print compared to conventional medium- and low-pressure UV systems.
Conventional low-pressure lamps only damage the DNA as a result of absorption of the monochromatic (254nm) wavelength. However, in general, microorganisms use a repair mechanism to get rid of UV damaged DNA.

Using berson MultiWave® lamps, with their broad band polychromatic spectrum, not only DNA is damaged but also other biomolecules are (in)direct influenced. This results in a different repair tendency compared to monochromatic low-pressure UV lamps.

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Berson InLine UV Advantages

  • Peace of mind with optional 5 year manufacturers warranty on the UV system*
  • Extremely small operational footprint.
  • Can be mounted horizontally or vertically in virtually any existing installation.
  • Easy to retrofit into existing installations.
  • All wet parts easily accessible and can be performed by your general maintenance staff.
  • Available with single sided access and slide hatch opening for installations with limited access.
  • Automatic mechanical wiping system keeps sleeves clean resulting in a higher UV dose
  • Berson systems are validated to the most stringent third party approvals, including DVGW, USEPA, JWRC, NWRI and NSF
  • UV reactors can be designed to fit any piping size
  • Controls can be adapted for integration with all commonly applied process control environments.
  • Range of control options including local control interfaced with a central (SCADA) system through Modbus RTU, Ethernet IP or analogue. PLC based also available.
  • The Berson InLine System is the most copied design in UV
  • Electronic lamp drivers designed to reduce energy costs and lamp ageing. CE and UL approved
  • Conventional Ballasts
  • High output medium pressure lamps minimise maintenance costs.
  • Long life quartz sleeves
  • UV intensity sensors either field-calibrated or controlled absolute sensors 
  • Hydraulically optimised for uniform and optimal UV dose distribution
  • Stainless steel 316L and chlorine resistant alternatives available
  • Pressure rated up to 16 bar (230 psi)

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*conditions apply

Berson InLine UV System Features

  • Validated performance
  • Medium pressure lamps
  • Compact and flexible design reduces capital costs
  • Ease of maintenance
  • Clever design reduces operational footprint
  • Ultrawipe for clean sleeves
  • Range of control options
  • Electronic lamp drivers
  • Customised solutions
  • UV system standard 18 month warranty 
  • UV system optional 5 year manufacturer's extended warranty*

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*conditions apply

Berson UV System Validation

Berson's UV systems are validated to the most stringent third party approvals, including DVGW, USEPA, JWRC, NWRI and NSF. In the case of the most internationally accepted regulations- DVGW and USEPA- our systems are validated under challenging hydraulic conditions (after a 90 degree pipe bend) using 240nm quartz sleeves to prevent potential Nitrate conversion.

Validations are regularly upgraded to allow the application of the newest lamp and ballast technology.

Click the link below:

Learn more about UV Disinfection and Validation 

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berson uv

Berson has over 40 years experience in UV technology. Berson was a pioneer in the introduction of UV for drinking water in Western Europe in the early 1980's and since then has expanded the application of UV technology globally. The Berson InLine UV design, introduced in 1995, has become the standard for medium pressure UV applications for drinking water worldwide.

The company is based in the Netherlands. Berson was acquired by British multinational Halma p.l.c in 1988 and, together with sister companies Hanovia in the U and Aquionics in the USA, is the global leader in UV for water treatment.

UV Applications

Berson offers a wide range of UV systems for drinking water, wastewater and water reuse validated by DVGW, USEPA and NWRI. These validations ensure end-users and authorities can be confident that the performance of the the UV system is appropriate for the application. Berson's water applications range from disinfection to advanced oxidation for the removal of organic (micro) contaminants.

Quality

Quality is one of Berson's main drivers. The company holds both ISO 9001: 2000 and 14001: 2004 and continues to improves its processes to meet customers needs,

Global Network

A global sales and service network, trained by Berson, ensures customers worldwide with the right products and outstanding service, ensuring the long lasting performance of their UV systems.

 

 

 Visit the Berson website: www.bersonuv.com

 

Enquire Now

Berson Open Channel UV Disinfection

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Berson

The OpenLine UV system from Berson is the smart way to convert to chemical-free disinfection.

Berson OpenLine UV System

The OpenLine UV system from Berson is the smart way to convert to chemical-free disinfection. It is engineered for easy installation and operation. Standard flanges make connection to process piping trouble-free. The Berson OpenLine features a stainless steel channel and is available in six standard single-channel sizes.
Water level is accurately maintained with the use of the control weir. Lamps and the quartz lamp-sleeves are immediately accessible, plus pneumatically driven wiping of the quartz sleeves is standard. Robust, water tight electrical and pneumatic connections allow for quick and easy servicing of lamp modules.
UV Dose, Flow, Itensity and Alarm indications can be quickly monitored and adjusted at the NEMA 4X (IP65) Human Machine Interface (HMI) panel.
Single channel flows up to 160m3/h are available (higher flows are accommodated through the use of multiple units operated in either series or parallel). Electrical ballasts can be mounted under the Berson UV channel to reduce the footprint, while providing easy access for service or future expansion. Minimal civil work is required as the need for the construction of a concrete channel is eliminated with the Berson OpenLine UV system.

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Berson Openline Systems Advantages

The Openline systems for channel mounted UV systems can be the right solution where an existing channel is available. UV can be easily fitted and made operational for final disinfection.

  • Available as horizontal Open Channel UV lay-outs or vertical Open Channel UV lay outs
  • Modular and future proof design allows additional UV racks to be added in the event of water quality deterioration, or flow increases
  • Electronic lamp drivers mounted in heavy duty electrical cabinets protects against harsh environments
  • Rapid exchange of ballasts possible
  • Monitoring provided by calibrated UV intensity sensors
  • Wiping system operated pneumatically
  • Additional cleaning systems available where algae, hardness, iron or manganeses contents are high
  • All under water structures are stainless steel 316
  • All above water components are stainless steel 314
  • All racks, connectors, and components made for easy operation and maintenance
  • Peace of mind with optional 5 year manufacturers warranty on the UV system*

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* conditions apply

The Berson Openline System Features

  •  UV Intensity Monitor
  • Lamp Hour Counter
  • Lamp Status Monitoring
  • Failure Alarms
  • Up to 14,000 hour lamp life guarantee*
  • UV system standard 18 month warranty 
  • UV system optional 5 year manufacturer's extended warranty*

*conditions apply

Contact us on 02 4735 5054 or

Berson's UV systems are validated to the most stringent third party approvals, including DVGW, USEPA, JWRC, NWRI and NSF. In the case of the most internationally accepted regulations- DVGW and USEPA- our systems are validated under challenging hydraulic conditions (after a 90 degree pipe bend) using 240nm quartz sleeves to prevent potential Nitrate conversion.

Validations are regularly upgraded to allow the application of the newest lamp and ballast technology.

Click the link below:

Learn more about UV Disinfection validation

Contact us on 02 4735 5054 or

berson uv

 Berson has over 40 years experience in UV technology. Berson was a pioneer in the introduction of UV for drinking water in Western Europe in the early 1980's and since then has expanded the application of UV technology globally. The Berson InLine UV design, introduced in 1995, has become the standard for medium pressure UV applications for drinking water.

The company is based in the Netherlands. Berson was acquired by British multinational Halma p.l.c in 1988 and, together with sister companies Hanovia in the U and Aquionics in the USA, is the global leader in UV for water treatment.

UV Applications

Berson offers a wide range of UV systems for drinking water, wastewater and water reuse validated by DVGW, USEPA and NWRI. These validations ensure end-users and authorities can be confident that the performance of the the UV system is appropriate for the application. Berson's water applications range from disinfection to advanced oxidation for the removal of organic (micro) contaminants.

Quality

Quality is one of Berson's main drivers. The company holds both ISO 9001: 2000 and 14001: 2004 and continues to improves its processes to meet customers needs,

Global Network

A global sales and service network, trained by Berson, ensures customers worldwide with the right products and outstanding service, ensuring the long lasting performance of their UV systems.

 

 

 Visit the Berson website: www.bersonuv.com

 

Enquire Now

Berson Sense T

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Berson

UVT monitoring, made simple! Low cost, low maintenance and small footprint UVT measurement. Ideal for inline, open channel or bench-top applications.

Sense T UVT- Transmittance Monitoring

The Sense T is the world’s first UV-T monitor to incorporate a UV-C LED light-source in place of a conventional mercury lamp.

Monitoring UV-Transmittance is an important part of UV system control, and now with the Sense T incorporating a LED light source you can expect extremely stable readings in all conditions, over an extended lifetime. The unique, patent-pending design utilises a single lamp and sensor, eliminating drift seen in designs using multiple lamps and sensors.

With its low operating cost, small footprint, and ultra long lamp life, the Sense T  UV -Transmittance monitor is the perfect solution for reliable water testing. It can be installed directly into process pipes, open channels, or used offline.  The Sense T measures UV-Transmittance automatically and then displays the results on the user friendly backlight LCD screen.

Models available for :

    • In-line process applications- featuring sanitary connection suitable for high purity applications
    • Open channel applications- supplied with a mounting bracket that automatically adjusts for varying water levels
    • Bench-top- Offline version with battery back-up for remote and hand-held use.

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Aquionics is  the North American sales, marketing and service arm of Hanovia Inc, a division of Halma plc. Aquionics incorporates the UV products from Berson – Neunen Holland, also a Halma plc division. Together Aquionics and sister UV companies in the Halma group have been leaders in the UV world since 1924. 

 

Sense T- UV Transmittance Monitor Features

  • UV-C LED light source provides ultra long life, low running cost, and stable measurements
  • Versatility-online readings in process or open-channel, handheld use for grab sample readings
  • Instant on/ off, with no warm up time
  • Backlit screen displays clear, simple readings
  • Automatic wiping prevents build-up of fouling in all water conditions.
  • Mercury free
  • Ultra small footprint
  • Low power requirements
  • Long battery life

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Sense T- UV Transmittance Monitor Specifications

 

  • Light sources- UV-LED
  • Wavelength/ Pathlength- 254nm@1cm
  • Range- 10- 100%
  • Accuracy - +/- 1.0%
  • Repeatability- +/- 0.1%
  • Resolution-0.1%
  • Measuring Interval- 60 seconds
  • Power Supply- 24VDC
  • Output- 4-20mA

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Watch the video to below to find out more about Sense T, the world’s first UV-T monitor to incorporate a UV-C LED light-source in place of a conventional mercury lamp.

  

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How Does Ultraviolet Disinfection Work?

Ultraviolet energy causes permanent inactivation of micro-organisms by disrupting its DNA so that they are no longer able to maintain metabolism or reproduce. All bacteria, spores, viruses and protozoa (including Cryptosporidium and Giardia oocysts are permanently inactivated by UV). The maximum effectiveness occurs at between 240nm and 280nm. The Hanovia UV systems produce these wavelengths in abundance.

The Mechanism of Ultraviolet Disinfection

Strong sunlight disinfects water by permanently de-activating bacteria, spores, moulds and viruses. Over a century ago, scientists identified the part of the electromagnetic spectrum responsible for this well-known effect; wavelengths between 200nm and 300nm, often called UV-C. The most effective single wavelength is typically UV at 265nm, however recent research in the USA has shown that 271nm light and 263nm light are the most effective UV wavelengths for the deactivation of particular target organisms. 

The mechanism of kill is well documented and unlike chemical disinfectants the organism is unable to develop any immune mechanisms. The mechanism of kill involves the absorption of photons of UV energy by the DNA, which fuses the DNA and prevents replication. DNA (Deoxyribonucleic acid) consists of a linear chain of nitrogen bases known as purines (adenine and guanine) and pyrimidines (thymine and cytosine). These compounds are linked along the chain by sugar-phosphate components. The DNA of most forms of life is double stranded and complimentary; the adenine in one strand is always opposite thymine in the other, and linked by a hydrogen bond, and guanine is always paired with cytosine by a hydrogen bond. The purine and pyrimidine combinations are called base pairs. When ultraviolet light of a germicidal wavelength is absorbed by the pyrimidine bases (usually thymine) the hydrogen bond is ruptured. The dimer that is formed links the two bases together, and this disruption in the DNA chain means that when the cell undergoes mitosis (cell division) the DNA is not able to replicate. The most effective wavelengths to achieve this effect are found between 263nm to 275nm, and the peak wavelength distribution is dependent on the target organism.

The optimal operating temperature is 15oC, and the lamp output will fall off rapidly as the lamp temperature migrates from this condition. These lamps should not be used if the water is hot or cold, or if the water flow is intermittent as the temperature build up will cause the lamp output to decrease. Frequent switching of these lamps will have a detrimental effect on lamp life, and the most probable failure mode will be failure of the filaments, which become brittle. The article "The dying of the light" describes the variable output of these mass produced lamps and offers some suggestions as to how the performance might be optimised. Typically these lamps have an efficiency of 25-30%, which is temperature dependent. The lamp life is typically 8000 hours, and the lamps have the advantage of being mass produced and easily second sourced.

Amalgam lamps have been developed recently to overcome the problems associated with traditional low-pressure technology. This type of lamp contains a mercury amalgam, and typically up to 120mg of mercury is contained in each lamp. The Amalgam lamp is typically very long, and not unusually can be more than 1.5 m (5 feet) in length. Once switched on, the Amalgam lamp output is not effected by water temperature fluctuations, however the large size of the lamp does mean that they can take up to 800 seconds to get to full power, and the warm up time is temperature dependant, as the successive strikes below illustrate.


Ultraviolet  Applications

Research is now being undertaken to verify the effect that shorter wavelength ultraviolet  light has on the other cell membrane of the organism. This shorter wavelength is more energetic and is absorbed by the organisms outer membrane. A lethal insult is effected, which means that the cell is unable to effectively regulate osmotic pressure. This effect coupled with the fusing of the DNA means that UV is a simple, elegant disinfectant and one that will increasingly replace the more traditional chemical techniques.


The Production of Ultraviolet Light

Ultraviolet light is most typically generated from a low pressure or a medium pressure lamp. These lamp types are different in character and performance, and are described below:

Low Pressure ultraviolet lamps are the most common lamp type and are the oldest source of ultraviolet light. The consist of a quartz envelope that separates two tungsten filaments. The lamp is evacuated to <10torr and approximately 60mg of mercury is introduced into the quartz envelope. The spectral output of this lamp type is monochromatic, a single line output at 253.7nm. A fluorescent lamp is a low-pressure lamp that has the inner surface of the lamp coated with phosphors to absorb all of the 253.7nm light, and only emit the longer wave visible light. This lamp type is typically 1 meter (3 feet) in length. This lamp has an output that is temperature dependent and can take up to 400 seconds to get to full output in cool or hot water.

The medium pressure ultraviolet lamp that is built by Hanovia is designed to have a spectral output that is specifically enhanced in the germicidal region. These lamp types are often called polychromatic, as they have a continuous output from 200nm up to the long wave visible light. Medium pressure lamps have a deeper vacuum produced within the quartz envelope (typically 1000 torr) and a 3.5Kw lamp will contain approximately 300mg of mercury. The Hanovia lamps have an efficiency of between 15% to 20%, depending on lamp type, and typically 15 low pressure lamps or 6 amalgam lamps will have a comparable output. The medium pressure lamp is hot running and typically the lamp surface will reach 800oC, however the protective sleeve that separates the lamp from the fluid being treated will not usually rise above 60oC. An over temperature detector will power down the lamp should the water flow stop for an extended period. Medium pressure lamps are typically from 20cm to 1.5M in length and a variety of quartz types are selected depending on the required spectral output; pure fused silica is used for disinfection, dopants are introduced to enhance particular spectral regions, or to inhibit ultraviolet wavelengths which at extremely high ultraviolet doses could have detrimental effects.

The Hanovia ultraviolet lamps are built at the Slough factory in a clean room environment. Every lamp is individually tested before despatch, and each batch is 100% documented to ensure that in the unlikely event of a lamp failure, every lamp made in the suspect batch can be traced. Hanovia manufactures in excess of 12,000 lamps per annum. Each lamp is individually numbered and any lamp failure is investigated and a failure mode analysis report generated.

Ultraviolet Technology in Use

Ultraviolet technology is now applied by a broad range of operators from municipal effluent to ultrapure rinse water, and from viscous high brix sugar syrups to air. The technique has been successfully extended to disinfect packaging materials prior to filling, and new developments have included the use of UV to deodorise nuisance smells from industrial or municipal dischargers. Ultraviolet is also applied to drinking water to assist in the destruction of pesticides or other contaminants that have entered the aquifer, such as NDMA or MTBE. In each case, the ability of a monitoring system to measure the fluence being emitted by the lamp allows the operators to have confidence in the integrity of the system. Hanovia systems are designed to be fail safe and the control protocols that are used will not allow untreated water of effluent to be sent forward. The dedicated ultraviolet monitor measures the output from each lamp. The monitors are sealed and do not allow any operator adjustment. The Hanovia ultraviolet monitor measures intensity in absolute units of mw/cm2. An online transmittance monitor measures the transmittance of the fluid being treated, and not unusually surface water can have a very high fluctuation in transmittance. Use is made of data logging facilities to demonstrate the adequacy of treatment, and to provide a permanent record of disinfection. This transparency is often required by a regulator or by those further up the supply chain to demonstrate that the water used to make product or water used as a part of the manufacturing process in wholesome.

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water reuse uv disinfectionBerson UV disinfection System for Water Reuse at the Filtration Plant of Bathurst Regional Council.

The installation disinfects the filter backwash water at the plant and will help the town conserve its potable water supplies as well and provide substantial water savings.  Read more...

 

uv disinfection backwash waterWorld’s Largest Backwash Water Reuse Installation Opts for Berson UV Disinfection Technology

1.25 million m3/year of water is now recycled as drinking water at Dutch groundwater facility. Berson’s UV systems are being used to disinfect reused backwash water. Read more....

 

 

irrigation water uv disinfectionGolf Courses Using Wastewater UV Disinfection By Berson for Water Reuse in Irrigation

Two golf courses in Anthem, Arizona, are using wastewater UV disinfection by Berson for water reuse in irrigation. As part of its rapid expansion the town recently a UV system from Berson UV to disinfect its wastewater. Read more...

 

uv_disinfection_water_reuseWastewater Berson UV Disinfection- Water Reclamation Facility

Berson UV disinfection equipment is helping the award-winning Flat Creek Water Reclamation Facility (WRF) in Georgia, USA, exceed permit limits for faecal output by a significant margin. The Berson systems were installed by its American sister company. Read more

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