Ultraviolet Water Disinfection Systems

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The Ultraviolet Disinfection system disinfects wastewater flows up to 500,000 US GPD with a small footprint and ease of operations.

Application

To meet disinfection requirements, Tipton packaged wastewater treatment plants can be supplied with an Ultraviolet (UV) Disinfection system. The TIPTON system’s horizontal channel disinfects wastewater flows up to 500,000 US GPD (up to 1,894 m3/day). The system’s most significant features are its small footprint and ease of operation.

Design Considerations

Disinfection Systems: Ultraviolet Disinfection Process

When designing a UV Disinfection system into the overall Tipton wastewater treatment plant (WWTP), the UV inlet must be directly connected to the previous treatment stage’s outlet. The connection options are as follows:

  • A bolted U-channel pattern provides a square connection and is typically used for bolt-on mounts for structural steelwalls, concrete channels, or for custom connections. This is TIPTON’s standard configuration.
  • Transition plates can be bolted to the U-channel to allow for pipe stub, threaded pipe, or flanged pipe connections.
  • Transition boxes can be bolted to the U-channel pattern. The boxes can have 150# flanges, flange patterns, pipe stubs, or threaded pipe connections. The transition boxes are used to connect to piping where high flows are expected or turbulent. To create a more even flow, the transition boxes help to de-energize and baffle the wastewater.

Required Information for Design

  • Discharge permit
  • Peak instantaneous flow rate
  • Average flow rate
  • No flow situations
  • UV transmission percentage at 254nm
  • Total suspended solids (TSS)
  • Biological oxygen demand (BOD)
  • Installation location (indoor or outdoor)
  • Pre-process description
  • Access to maintenance personnel
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Typical Installations

  • Private developments
  • Schools and institutions
  • Campgrounds and trailer parks
  • Highway rest stops
  • Small towns
  • Business parks
  • Industrial wastewater plants
  • Parks and recreational areas

Standard Features

  • Stainless steel channel construction
  • Built-in level control weir with removable drain plug
  • Stainless steel weatherproof modules
  • Remote modified NEMA enclosures with window kits displaying lamp status and elapsed run time
  • Low pressure, high output, or amalgam lamp technology

Operation

In order to meet the effluent discharge permit limits, the UV system will require maintenance. Lamps will need to be replaced every 8,500 hours. Due to the heat of the lamps and the harsh nature of the wastewater, the quartz sleeves (the protective material over the lamps) will also need to be cleaned and possibly replaced. Fouled quartz sleeves will prevent the UV light from penetrating the wastewater solids passing through the trough, and thus, will reduce system efficiency. An operator is required to remove the modules and clean the quartz sleeves with a lime, calcium, or rust remover, which only requires a work table or on a cleaning rack.

Optional Features

Ultraviolet Disinfection Process

  • Ultraviolet (UV) intensity monitoring
  • 4-20 mA output or dry contact alarming
  • Hand, off, and auto (HOA) switches
  • Transitions for flanged, piped, or threaded connections on the inlet and outlet of the UV system
  • Cleaning racks or tanks
  • Complete standby spare modules
  • Redundant banks