Providing full-range services to meet permit demands
Garver evaluated, designed, and provided construction support services to expand the Claremore wastewater treatment plant capacity from 2.2 to 3.5 MGD. Garver helped convert the single-stage, trickling filter plant to a custom-engineered, biological reactor process that can employ enhanced biological nutrient removal (BNR) methods. We partnered with the Oklahoma Department of Environmental Quality (ODEQ) to obtain targeted design variances translating into reduced capital expenditures by retrofitting existing concrete structures for new treatment processes.
The ODEQ-approved preliminary engineering report recommended an alternative that involved upgrading every process at the plant and converting it to an advanced, activated sludge treatment process with BNR capabilities. Upgrades included designing a new non-clog influent pump station with variable frequency drive (VFD) controls (ahead of screening), a new headworks with screens to remove floating debris and grit before wastewater enters the plant, converting trickling filters to roughing filters to increase organic and hydraulic loadings, an advanced activated sludge process with VFD-controlled RAS/WAS pumping, and clarifier upgrades. It also required a new outfall on the Verdigris River. Together, the new treatment process helped the Claremore WWTP produce effluent well below permit levels for biochemical oxygen demand (BOD), total suspended solids (TSS), and ammonia (NH3).
Garver assisted the City of Claremore, Oklahoma with bidding and selection of a qualified contractor to construct the improvements. Garver also assisted with construction phase support services that included on-site construction observation, contract management, operator training, and plant start-up assistance. We also prepared the operations and maintenance (O&M) manual to address aspects of operations and maintenance of the WWTP improvements in accordance with ODEQ guidelines and requirements. In general, the O&M manual describes each unit process, specific operations, maintenance criteria and parameters, schedules, troubleshooting, manufacturer’s warranties, and representative contacts.