The result of fifteen years of engineering studies and design, EPA negotiations, and planning by St. Marys Council, the Administration, and plant operators, a new wastewater treatment plant began operation in 2009. The new facility increases daily plant capacity to 3,000,000 gallons and allows for the treatment of wet weather flows up to 9,000,000 gallons each day. Total construction cost amounted to $11,012,020. Click below to see a brochure related to construction of the new wastewater treatment plant.
|St. Marys New Wastewater Treatment Plant|
Equipment at the beginning of the treatment plant controls the volume of wastewater that can be processed for treatment. During high flow conditions (>9,000,000 gallons per day) when the plant cannot treat all of the flow, an electric gate can divert a portion of the flow to a 2,700,000 gallon equalization basin for storage. The captured wastewater in the equalization basin is automatically returned to the treatment plant for treatment when system flows return to normal. A computerized process monitoring and control system controls all aspects of flow equalization
Polluted wastewater pumped into the Wastewater Treatment Plant goes through a complex, multi-stage treatment process that takes about 22 hours. The treatment plant uses physical, biological, and chemical processes to removed contaminants, producing a high quality discharge.
The Wastewater Treatment Plant Laboratory contains all the various equipment and chemicals needed to monitor the wastewater. Thoroughly trained Lab Technicians check water quality during all stages of the treatment process to insure optimum treatment and to protect the water quality of the St. Marys River. Tests include pH, phosphorus, ammonia, nitrate, alkalinity, dissolved oxygen, biological oxygen demand (BOD), carbonaceous biological oxygen demand (CBOD), chlorine residual, total, fixed, and volatile solids, and bacteriological.
Regular maintenance is a very important part of operating a public wastewater utility. Personnel are charged with many tasks and projects in order to keep the treatment plant operating at peak levels. Examples include: preventative maintenance of treatment plant and lift station equipment, regular inspections of the plant and lift stations, and many other activities.
Two full time operators staff the St. Marys Wastewater Treatment Plant eight hours per day, seven days per week. Two supervisors, a laboratory technician, and two maintenance men split time between the plant and other duties. All employees are Ohio EPA certified operators. The increasingly technical nature of Federal and State regulations requires continuing training on the part of all employees.