Edgar Springs Wastewater Treatment Facility
The City of Edgar Springs owns and operates the Edgar Springs Wastewater Treatment Facility (MO-0105449). In January 2009, the Missouri State Operating Permit (MSOP) for the facility was renewed and contained a stringent schedule of compliance for the facility's effluent. Specifically, the City was required to review the facility's capacity for ammonia removal from the wastewater and provide the necessary upgrades to the facility to meet new ammonia effluent limits. The new effluent limits are scheduled to be implemented in March 2012.
In an effort to address the schedule of compliance, the City retained Archer to perform an evaluation of the WWTF to determine its capacity to remove ammonia from influent wastewater. Based on the on-site inspection performed of the facility, the improvements necessary to allow the facility to meet mandated effluent ammonia concentration limits are numerous and varying. Several of the most critical items requiring immediate attention include: the implementation of a new equalization basin; and upgrade of the existing aeration system; and the implementation of influent and effluent flow metering at the facility. It is believed that the implementation of these improvements will better enable the facility operator to limit hydraulic shock loads to the facility and provide adequate aeration for the reduction of ammonia to nitrates.
Several necessary improvements, not directly related to the pending ammonia limits, include: the replacement of the existing influent lift station; the replacement of the existing UV disinfection system; and the repair and modification of the existing standby emergency generator should be implemented so as to keep the City in compliance with their operating permit. Implementation should be performed immediately as the deficiencies associated with each item represent a significant reduction in the capacity of the facility to operate within its original design specifications. Other improvements that should be implemented include the replacement of the Aero-mod aeration-sedimentation modules and Hydro-sock effluent filter equipment. These pieces of equipment are operating beyond their originally intended design life. These improvements would greatly aid in the operability of the facility.