Boulder: The city has embarked on an $8.1 million 18 month project for wastewater treatment plant imprvovements

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From the Boulder Daily Camera (Heath Urie):

The project, which is now underway, will upgrade several critical components of the plant at 75th Street and Jay Road that turns the city’s raw sewage into water that’s clean enough to discharge into Boulder Creek. The work will include three separate projects.

One will convert the facility to use an ultra-violet sterilizer instead of chlorine gas. “The gas chlorine system is the single greatest danger at the wastewater treatment plant,” said Douglas Sullivan, the city’s utilities project manager…

Sullivan said upgrading the system to no longer rely on the chemical is the department’s “No. 1 priority.” The total cost of the new system is about $3.5 million…

A second project will upgrade the headworks at the plant. Headworks carry all of the raw sewage into the plant. The headworks contain screening devices that remove large debris from the sewage, and system that remove grit and rags. Those systems are now about 30 years old, and need to be replaced…

The third project will upgrade two large, cylindrical tanks that act as the stomachs of the wastewater plant. Known as the digester tanks, the devices heat and mix sewage to create solid waste “cake” that is sent to agricultural lands in east Adams County. The $1.6 million of upgrades will install a new mixing system that will help meet federal safety standards.

More wastewater coverage here.

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