UV Doctor - UV Applications

UV is a non-chemical disinfection technique. UV provides municipalities and industries with a cost-effective means of complying with today's strict environmental regulations. This provides a huge benefit for wastewater discharge and water reuse. UV improves end-product quality and protects the consumer from disease without the need to handle or store hazardous chemicals. The systems are compact and easily retrofitted and can be automatically controlled using excisting process control software.

Highly efficient treatment can be obtained by using a programmable logic controller (PLC), ensuring the minimum UV intensity required for adequate disinfection is maintained for changes in flow rate and water quality. The UV dose the microorganisms receive is a factor of the lamp's UV intensity multiplied by the exposure time with a correctional factor for the absorption level of the fluid. The UV dose required for satisfactory disinfection is calculated according to the type of microorganisms in the liquid. UV is a photochemical process destroying unwanted microorganisms without changing the chemistry of the medium or altering the odor, flavor, or pH of the liquids.

A low pressure, mercury vapor arc-tube has been traditionally used for UV disinfection. With an input power of 15-80 watts, the UV frenquency emitted is 253.7 nm in the germicidal range and 184.9 nm in the shorter wavelength range. This produces an output of 3-40 watts. UV intensity can be increased, according to flow rate and quality, by increasing the number of lamps. Multiple low pressure arc-tube systems are commonly used to treat fluids with low flow rates. These low pressure arc-tubes are limited to treating fluids in the temperature range of 40-100 F degrees.

Medium pressure arc-tubes are a viable alternative to using a large number of low pressure arc-tubes in a system. Requiring a higher input voltage, the high intensity arc-tube emits a broad spectrum covering the ultraviolet, visible, and infrared ranges. Emitting a high output in the 200-300 NM germicidal range (see fig. 1), a single medium pressure arc-tube rated @ 4000 watts can replace 20 low pressure arc-tubes rated @ 65 watts. Another consideration is the medium pressure arc-tube will not be affected by fluid temperature.

Disinfection with UV surface irradiation is rapidly becoming a viable and cost effective alternative to traditional chemical methods. Due to advancements in equipment and measurement technology, UV surface disinfection has developed into a reliable micro-organism reduction method that routinely delivers consistent, repeatable results. UV Doctor has a major focus in surface disinfection. These markets would include but not limited to Pharmecutical, Medical, Food and Beverage industries.

UV Doctor utilizes the most advanced state of the art Ultraviolet light generators.
Our units feature instant strike lamps and are at full power within seconds.
The lamps feature an unconditional 5000 hour guarantee for UVC output >70% of new.

UV Doctor can provide you with Ultraviolet light measurement devices that are completely documented and traceable to National Institute of Standards Technology. (N.I.S.T.)
UV output measurements are documented along with a Bioassay to confirm
results.

In order to provide an accurate solution to any one particular application, a few factors need to be taken into consideration before sizing and selecting the type of UV equipment.

Once these critical items are addressed, UV Doctor can construct a system for you.

The most popular UV treatment design has been to install arc-tubes in a circular chamber where the arc-tubes are axial with the flow. Water enters the treatment chamber, passes along the arc-tubes providing disinfection and then leaves the chamber. Each chamber can be equipped with an internal cleaning mechanism to remove particulates from the quartz sleeves (which protect the UV arc-tubes). They are available as a manual or automatic mechanism.

A second design uses low pressure arc-tubes installed in a rack-like configuration and typically placed in an existing chlorine contact channel. There are normally about 4 to 8 of the five foot arc-tubes installed in a single rack. Quartz sleeves (the sleeves that protect the UV arc-tubes) require cleaning to remove deposits which accumulate and degrade the efficiency of the system by blocking the UV energy. It is necessary to remove each rack and either wash it by hand with a chemical cleaner or dip the entire rack in a chemical bath to dissolve the deposits. Cleaning is recommended at a minimum every other week. More frequent intervals may be necessary in some circumstances.

A third design uses medium pressure arc-tubes. This design is configured with clusters of arc-tubes in a line. These are commonly referred to as Inline systems. A cluster may contain 4 to 12 arc-tubes. The arc-tubes are horizontal and perpendicular to the flow. This configuration is beneficial in areas of installation, large flow rates, headloss, and available space. These systems are equipped with manual or automatic cleaning mechanisms.

UV DOCTOR offers a variety of UV system configurations that will accommodate virtually any application. UV DOCTOR is proud to inform our clientele our systems are made in the USA!

The unique ability of UV to deactivate microorganisms in water, air and on surfaces without creating byproducts of residual effects enables UV disinfection is used for a variety of applications. Technologies have extended its use to treating greater water flow, and effluent and process water with high levels of solids.

Whether installed as the main disinfection system or as a back-up to alternative methods, UV treatment systems can ensure that microbial contamination levels are effectively controlled throughout a production process. This offers manufactures product quality and a means to increase process efficiency without safety or environmental risks.

If you need assistance or information concerning our products
please call (702) 614-4200 or Email us at sales@uvdoctor.com