12/28/2023 0 Comments Gas station scum mapThe biological treatment process is comprised of three sets of aeration basins and three sets of final clarifiers. Wastewater from southwest Little Rock enters the facility via a pressure line from a pump station located in College Station. Solids captured during the treatment process are re-circulated in the aeration tanks to maintain a viable microorganism population, while some solids are wasted from the facility process daily via pumping through a five-mile, 12-inch force main to the Fourche Creek Water Reclamation Facility for further processing.Īrkansas's most innovative wastewater water reclamation facility, Fourche Creek is a secondary treatment plant with step-feed activated sludge process and an installed capacity of 16 million gallons of wastewater per day.Ī combination of physical and biological processes is utilized to reduce the pollutant load by approximately 90% at the facility. Treated wastewater, which meets or exceeds all State and Federal requirements, is then piped to the Arkansas River through a six-foot diameter pipeline and discharged seven times cleaner than what occurs there naturally. The overflow then passes to the Disinfection Building where four channels of ultraviolet lights are utilized to sterilize the bacteria remaining after treatment. These circular clarifiers are 15 feet deep and 145 feet in diameter. These biological organisms that settle are returned to the activated sludge aeration tanks. A biological microorganism population, which utilizes the incoming dissolved organic material in the wastewater as food, is maintained in the tanks.įollowing the aeration tanks, the wastewater passes through a final clarifier section to capture the biological organisms that settle in the final clarifiers. Each of the six rectangular activated sludge aeration tanks are 15 feet deep, 40 feet wide, and 160 feet long. Wastewater is held in these basins for about two hours.įollowing primary treatment, the flow enters the activated sludge secondary process. Each circular clarifier is 11 feet deep and 115 feet in diameter. Solids and floatables are then sent to a Preliminary building where grit, gravel, and scum are removed. The flow then passes through three parallel primary clarifiers where solid materials settle to the bottom or float to the top to be skimmed off. Wastewater is then sampled, flow measured, and is then screened to remove large particles. Wastewater from Little Rock enters the facility via three 60-inch diameter gravity sewer lines at an average depth of 30 feet below ground and requires the pumping or lifting of the sewage in order for the treatment process to take place. A combination of physical and biological processes are utilized to reduce this pollutant load in wastewater. The facility is a two-stage "secondary" water reclamation facility, designed to reduce the pollutant load by approximately 90%. Secondary treatment facilities were added in 1972 and the facility is now rated as a 36 million gallons per day complete-mix activated sludge facility, serving approximately 70% of the City of Little Rock. From 1961 until 1972, the facility was equipped with only primary treatment. The Adams Field Water Reclamation Facility has been in operation since 1961 and was Little Rock's first wastewater water reclamation facility.
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