WK Dickson provided engineering design, permitting, and construction oversight for improvements to this 1.4 MGD plant. Both existing sequencing batch reactor (SBR) biological systems were upgraded, including the replacement of the coarse bubble aeration system with a new fine bubble aeration system. The dissolved oxygen control system was inoperable, so variable speed drives were added to new blowers and the SBR controls were upgraded. This allowed for blower operation to automatically modulate based upon dissolved oxygen levels in the SBR. Two submersible mixers were added within the existing post equalization tank and the chemical feed piping was relocated, increasing reaction and flocculation time. These upgrades substantially increased operator flexibility and significantly improved ammonia and biological phosphorus removal in that phase of the treatment process. Following development of preliminary cost projections, the corrective action plan included improvements to the aeration system, the SBR system, effluent filters, UV system, biosolids system, and the chemical feed system.
ACEC-GA Engineering Excellence People's Choice Award