It’s not every day a wastewater treatment plant project requires the replacement of a digester tank lid. What makes this feat so impressive? The lid itself is 50-feet in diameter and weighs about 77,000 pounds, which required a 210-ton crane to lift. During the lift, it looked like there was a UFO hovering over the property.
Why did the tank lid need to be removed in the first place? A hole had developed on the underside of the lid, thus allowing the hollow lid to be filled with sludge. The tank will receive a new membrane-style cover during Phase II of the project.
The overall project for Phase I involves the following:
- New chlorine contact basin on the end of the existing equalization tanks.
- New chemical building for feed of sodium hypochlorite and sodium bisulfite to the new chlorine contact basin.
- New aeration basin #7.
- Renovation of the sludge control building, including all new sludge heating equipment.
- New ultraviolet disinfection building including a new non-potable water system and new effluent aeration system.
- New pump station to handle the centrate from the existing sludge dewatering building.
- New electrical service and electrical feeds to all buildings.
- Various site piping.
All work is being completed while protecting and maintaining the continuous operations of the facility. The $12 million project will be complete in summer 2017.