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Since the original wastewater treatment plant was completed in 1976, Fairfield has continued to expand and modernize its wastewater treatment processes. The most recent expansion was the addition of an administrative building at the plant.

The Wastewater plant processes 5.4 million gallons of water per day, removing various pollutants before discharging liquids to the Great Miami River and treating solids for disposal or reuse.

The treatment process

Raw wastewater travels through 173 miles of sanitary sewers to the Wastewater treatment plant. There, solids and liquids are separated through a series of processes that gradually filter out finer organic and inorganic solids.

Liquid waste is disinfected with ultraviolet radiation. UV disinfection works by affecting the DNA of microorganisms, eliminating their ability to reproduce and survive. This water is pumped into the river.

Organic solid waste, called sludge, is treated to stabilize the sludge, reduce odors, remove some of the water and reduce volume, decompose some of the organic matter, kill disease causing organisms and disinfect the sludge. This sludge is then used in land application programs as fertilizer.

For more details on these processes, click on the features in the diagrams below:

Liquid Treatment Process Interactive Flow Diagram
Click on any of the features shown in the diagram below for a detailed description of the equipment and its function.

Residual Treatment Process Interactive Flow Diagram
Click on any of the features shown in the diagram below for a detailed description of the equipment and its function.