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Bulb project complete

April 4, 2011

COLUMBIA CITY — Water Pollution Control Facility Superintendent Mike Cook reported to the Columbia City Board of Works about his facility’s new lights.
The lights, ultra-violet bulbs that play a key role in the cleaning process of treated sewage before it leaves the sewage plant, were being installed in increments after being purchased earlier this year.
“All the bulbs have been installed and when they (inspectors) sample today, we have to be in compliance,” Cook said.
“We shouldn’t have any troubles this year.”
The board approved the purchase of 120 UV lamps at $135 apiece costing $16,200. Aside from the bulbs, quartz sleeves were also purchased at $156 per unit, or $18,720.
The bulb replacement project cost $34,920.
The board approved purchase of the bulbs from Wedeco, the bulb’s manufacturer.
The UV lamps are used to disinfect sewer water as it travels from the secondary clarifier into the UV structure for disinfection.
The water leaves that station and heads to the aerator before leaving the facility.
According to Cook, the life expectancy of a typical UV bulb is three years. The previous batch of bulbs lasted about four years, according to Cook.

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