Featured Projects

St. Johns County Odor Control at Six Mile Master Pump Station

Jones Edmunds designed and provided construction-phase services for a two-stage, biological absorption/adsorption odor control system for the Six Mile Master Pump Station. The system included an RFP vessel, nozzles, two independent stages of inorganic treatment media, moisture controls, nutrient supply system, air supply fan, interconnecting ducting, and all necessary accessories. The biological treatment stages used an inorganic expanded clay media to facilitate absorption and adsorption of odor compounds. The first stage operated with an independently controlled irrigation system to maintain optimum wetted conditions to support microbial growth for biological destruction of the odorous compounds and removal of toxic metabolites. The designed airflow rate capacity of the system is 1400 cfm. The County’s existing SCADA system was modified to incorporate the new facilities associated with the odor control system.

City of Plant City Reclaimed Water Main Sanitary Sewage Force Main and Potable Water Main Improvements

Jones Edmunds provided the detailed design, prepared contract documents, obtained permitting, and provided limited construction-phase services for installing a Reclaimed Water Transmission Main (RCWM) and a Sanitary Sewage Force Main from the City’s wastewater treatment plant on Victoria Street to Cherry Street. The project involved preparing construction plans and specifications for two large-diameter parallel pipelines, along with roadway improvements, selected potable water main replacements, and future RCWM connection stub-outs. Specifically, the RCWM provided a source of reclaimed water from an existing RCW high-service pump station discharge pipe at the treatment plant to Wilder Road. Jones Edmunds’ services included:

• 16,600 feet of 24-inch reclaimed water main
• 12,600 feet of 20-inch sewage force main
• 2,000 feet of 12-inch potable water main
• FDOT permitting
• Roadway reconstruction of over 4,000 feet of Cherry Street
• CSX railroad permitting
• Stakeholder communication and involvement

The job included furnishing and installing the new pipe, valves, fittings, connections, and crossings; excavating, backfilling, and compacting; testing; re-paving; and disposal and restoration in accordance with the project plans and City of Plant City specifications. The pipelines were installed along rights-of-way and in most locations required restoring the entire roadway to the original grade and dimensions. In some areas minor roadway and drainage flow improvements were accomplished as part of revised restoration activities. Jones Edmunds was also responsible for project permits, including a crossing of active CSX railroad lines and required permits, including SWFWMD, Hillsborough County Health Department, and FDEP. We also coordinated with and installed pipeline in conjunction with an ongoing FDOT roadway-widening project, requiring FDOT permitting. The route of the pipelines mainly traversed residential and commercial areas, which required close communication with the public. Pipeline tie-ins required close coordination with Hillsborough County Community College at one terminus and the City of Plant City’s wastewater treatment plant at the origin of the project.

City of Largo Water Reclamation Facility Analysis & Recommended Upgrades

Jones Edmunds was part of a comprehensive team that evaluated the City of Largo’s sanitary sewer and wastewater treatment and disposal systems for capacity assessment and improvements. Jones Edmunds was responsible for the hydraulic and treatment capacity assessment of the City’s 18-MGD-AADF advanced biological nutrient removal wastewater reclamation facility (WRF). The project goals were to identify hydraulic improvements and treatment alternatives to reliably meet current and future hydraulic and biological treatment capacity needs for the current and expected future regulatory requirements. This evaluation was conducted through a combination of flow monitoring, physical survey, hydraulic assessment, and unit process assessment, including substantial efforts in biological system modeling and capacity assessments using customized and calibrated BioWin models. Jones Edmunds configured and calibrated the BioWin BNR modeling to simulate the performance of the existing biological nutrient removal processes and to evaluate several process configurations/modifications for biological nutrient removal improvements at future flows and loading conditions.In addition, Jones Edmunds implemented a full-scale clarifier stress testing program and computational fluid modeling to determine the ability of the secondary clarifiers to handle projected peak-hour flows and solids loadings. We configured a state-of-the-art clarifier computational fluid model (CFD) using the 2Dc CFD model developed by Dr. Alex McCorqudale at the University of New Orleans. Although the clarifiers did not meet 10 States Standards criteria for peak-flow conditions, field testing and modeling demonstrated that the clarifiers will handle the expected peak flows. Jones Edmunds evaluated the overall hydraulic performance of the chlorine contact basins at the plant by conducting a fluorometric dye study. This study determined the effective detention time achieved in the basin compared to theoretical detention time calculations and identified potential ways to optimize plug-flow dynamics.

City of St. Cloud Southside Wastewater Treatment Facility Expansion

Jones Edmunds provided professional engineering services for the preliminary design report (PDR), final design, permitting, construction administration, and start-up of a new 6-MGD Modified Ludzack-Ettinger (MLE) wastewater treatment facility to produce reclaimed water for unrestricted public access reuse for the City of St. Cloud. This project was a follow-up to a wastewater master plan conducted by Jones Edmunds to assess the City’s wastewater needs for the next 20 years. The PDR phase evaluated alternative unit treatment processes for headworks screening and grit removal; alternative biological treatment processes, including membrane bioreactor, oxidation ditch, and MLE; and alternative aeration systems including fine bubble and jet aeration. We conducted workshops with City engineering and operations staff to select the final unit process configurations and equipment. The recommended facility design includes headworks screening using mechanical step screens with screenings dewatering; vortex grit removal and classification; odor control using bioadsorption within aeration-tank-mixed liquor, anoxic/aeration basins, centrifugal blowers, and fine-bubble aeration; three 105-ft-diameter final clarifiers; effluent filtration with disk filters; chlorine disinfection with sodium hypochlorite; and a high-service reclaimed water pump station designed for a peak rate of 20 MGD. The plant design makes it easily expandable to 9 MGD.The plant included a new administration building and reuse of the old Southside WWTF tankage, which was converted into aerobic digesters for storing and stabilizing waste-activated biosolids before dewatering by a new screw-press dewatering system. Jones Edmunds prepared 95% design drawings and specifications and CM-at-Risk RFP documents for selecting a CM-at-Risk contractor. We conducted value engineering with the CM at Risk to reduce the overall Guaranteed Maximum Price for the project. The project received funding under the SRF loan program. Construction of the screw-press dewatering facilities finished in September 2005. Furthermore, construction of the 20-MG reclaimed water pump station finished in September 2006 to meet FDEP requirements and/or receive grant funding from SFWMD grant funding. The 6-MGD expansion began operation in 2008.The City of St. Cloud facility was featured and toured as part of the annual WEFTEC conference held in Orlando in 2009.