Underneath and throughout Lincoln are over 1,000 miles of sanitary sewer lines and 15 pumping stations that keep the wastewater flowing to two municipal water resource recovery facilities. The Theresa Street Water Resource Recovery Facility sits on 51 acres along Salt Creek in the north central section of the City.
Full Answer
Client background
The Lincoln Waster Water plant is a rural waster water treatment facility in Lincoln, Missouri. It’s main purpose is to remove contaminants from wastewater that’s filtered to its facility, turning it into effluent which can then be returned to the water cycle.
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Download the full case study to learn why the client wanted to do this project, the client’s background, challenges with the project, and the creative solutions EnergyLink’s engineering and construction team came up with to get the best out of their facility and yield the best economic results.
What happens to wastewater after it leaves the biological reactor?
After wastewater leaves the biological reactors, it is sent to the secondary clarifiers. Secondary clarifiers look just like the primary clarifiers but serve a different purpose. Due to the feeding requirements of the microorganisms, the wastewater now has a much smaller fraction of organic waste but a significant volume of the wastewater now contains the suspended microorganisms themselves. This combination of treated wastewater and suspended microorganisms is called "mixed liquor". Once the mixed liquor reaches the secondary clarifiers, the microorganisms settle to the bottom of the tank. The secondary clarifier is designed to separate the treated wastewater from the microorganism population and return most of the microorganisms back to the biological reactor.
How does raw sewage enter the recovery facilities?
Raw sewage enters the recovery facilities through influent pumping stations. At the raw wastewater pumping stations large mechanically cleaned screens with vertically placed bars remove larger debris like sticks, paper, and hygienic products. After being screened, the wastewater is pumped to the grit basins. Grit basins are designed to remove heavy particles, like sand, gravel, vegetable seeds, and egg shells. Material collected from the bar screens and the grit basins are hauled to the sanitary landfill (Bluff Road).
What is dewatering in a plant?
Dewatering is a process that removes excess water and reduces the total volume of biosolid waste that must be transported to the land application area. Digested solids from the anaerobic digesters are fed into three belt filter presses which squeeze out excess water between porous belts at the Theresa Street facility.
What is the final step in salt creek treatment?
Disinfection. After the treated wastewater leaves the secondary clarifiers the final treatment step, prior to discharging to Salt Creek, is disinfection. Some viruses and bacteria can pass through the treatment process and remain viable. To prevent these organisms from harming human beings, they must be destroyed.
What is the by-product of aerating wastewater?
The by-product of their metabolism is carbon dioxide, nitrogen, and water, which leads to a purified and treated effluent.
What is the phone number for sewer service?
If you experience sewer service problems you should call 402-441-7961. A field crew will investigate the nature of the problem as soon as possible. Back to top.
How much water does the Theresa Street facility use?
The Theresa Street facility has a maximum capacity of recovering 28 million gallons per day and on an average day presently recovers about 20 million gallons of water. The Northeast facility currently recovers about five million gallons per day. That adds up to 25 million gallons of water per day running through the recovery facilities – enough ...