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Why can’t CFPUA solve the sewer odor problem at the Pine Grove pump station?

Kevin Maurer

The odor you smell is from hydrogen sulfide gas, a byproduct of sewage over time, said Chris Bowling, the Pine Grove pump station project manager.

“Many variables affect the production of hydrogen sulfide, to include time, temperature, PH levels, physical components of the wastewater system, sulfide quantities, and sewer blockages, among others. A change in any one of these variables could result in localized or more widespread odor problems,” Bowling said. “This is particularly true at a site such as the Hewletts Creek Pump Station, which collects sewage from a large number of tributary pump stations and gravity sewer lines over multiple sewer basins. “

Bowling said “dealing with odor issues is a difficult and continuous challenge.” The Cape Fear Public Utility Authority has a Comprehensive Odor and Corrosion Control (OCC) Program that injects hydrogen peroxide into the sewer system to neutralize hydrogen sulfide.

“The Authority is currently upgrading the OCC Program to use calcium nitrate. Calcium nitrate helps prevent the formation of hydrogen sulfide, and is more effective than hydrogen peroxide,” Bowling said. “The new OCC Program will have 23 sites throughout New Hanover County and the Town of Wrightsville Beach which dose calcium nitrate. Currently 14 of these sites are operational, and the remaining sites should be operational within the next three months.”

User-contributed question by:
Robert Jiampetti

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