The screw conveyor has a long history of usefulness—dating back to the 3rd century BC. Since then, thousands of generations have created flexible screw conveyor systems to initiate smooth and continuous movement of bulk materials. Many industries currently use shafted and shaftless screw conveyors in the municipal water and wastewater industries to convey dewatered biosolids, sludge, screenings, and grit.
Screw Conveyor System Options
- End Seal Assembly
- Zero Speed Switch
- Drive Assembly
- Bio-GATE (Slide Gate)
- Bio-DIVERTER (Diverter Valve)
- Shafted and shaftless designs in several configurations and live bottom
- Perfect for congested locations
- Wide range of capabilities with multiple inlets and discharges as needed
- Resistant to high temperature, abrasives, and sticky materials
- Vast capacity practical to mix or meter materials
- Special safety features
- Heat tracing and insulation are available for any system
- Automatic central grease lubrication ensures longer service life
Nestled in the rolling hills of northwest Florida, Tallahassee is the home of Wakulla Springs, one of the world’s largest freshwater springs. The shallow aquifer is vulnerable to pollution, including stormwater runoff and nitrates from wastewater treatment. The city of Tallahassee’s main wastewater treatment plant, Thomas P. Smith WRF, is located near the springs.
In the early 2000s, the city began a study to determine how to improve reuse water quality and protect the water of Wakulla Springs. Under the guidance of engineering giant Hazen and Sawyer, the city developed a plan for upgrading the system, including biosolids separation and drying for eventual use as a class A biosolid.
The conveyance of biosolids within the dewatered sludge building to the dryer building was an essential part of the process, so the city purchased six JMS Bio-SCREWs of various lengths and configurations. After three years of operation, Warren Shepherd, the long-time Manager of Biosolids, reports that all conveyors have run full-time without issues. Shepherd notes, “I could not be more pleased with the equipment.”