Specifically designed to disinfect the effluent from small aerobic treatment plants, the Ultraviolet Disinfection Unit can reduce fecal coliform bacteria levels to well below the most stringent U.S. treatment standards, even when the upstream treatment plant is operating in a mild upset condition. Designed to disinfect residential wastewater, UV disinfection units are safe and harmless. There are no adverse effects from overexposing the effluent to germicidal ultraviolet light because UV disinfection does not form by products.
The disinfection chamber couples directly to the aerobic plant 4’’ discharge pipe and is permanently installed below grade. When fully inserted, the sub-assembly is properly positioned by pins mounted near the top of the disinfection chamber. This well-defined flow path gives the proper fluid exposure time.
The light source is mounted in the center of an anodized aluminum frame that divides the disinfection chamber in half. The frame seals against the inner surface of the disinfection chamber and prevents flow bypass. To control the lamp’s surface temperature, the ultraviolet light is surrounded by a clear fused quartz tube. When the disinfection chamber is filled with water, the ultraviolet light can operate continuously, whether or not water is flowing. Continuous operation within a lamp surface temperature range of 105-120° F provides optimum ultraviolet light output and long lamp life.
The disinfection sub-assembly, which extends approximately one foot above grade, is watertight. This protects the electrical connections against a fluid backup that could cause the wastewater effluent level to rise to the maximum height of the upstream treatment plant.
The UV system operates on 120vAC and consumes less than 25 watts. A green LED indicator on the junction box confirms the operating status of the UV system.
Maximum flow through the unit is rated at 10 gallons per minute (gpm), or 14,400 gallons per day (gpd), with the following effluent conditions:
Suspended Solids < 30 mg/liter - 5-day BOD < 30 mg/liter
Under the above conditions, fecal coliform reduction exceeds 3-logs, or 99.9%, at the end of the UV lamp life (one year of continuous operation).
Fecal coliform counts in the home aerobic treatment effluent typically range from 800 - 20,000 colony-forming units (CFU) per 100ml. CFUs measure viable fungal and bacterial cells.
SPECIFICATIONS:- UV Disinfection Lamp Assembly...Part Number 952
- Replacement UV Lamp...Part Number 9521001
- UV Control Panel Assembly...Part Number 9521000
- UV Insert...Part Number 952
- INSERT Ballast...Part Number 9520097
- Cord...Part Number 9520040
