JMS Bio-SCREW (Screw Conveyor System)

Screw conveyor technology has a long history of usefulness. Screw conveyor systems are currently used in many industries as they represent one of the most flexible bulk material conveyance methods available. Simple in design, the conveyor screw initiates a smooth, continuous forward movement of material. Both shafted and shaftless screw conveyors are used in the municipal water and wastewater industries to convey dewatered biosolids, sludge, screenings or grit.

JMS Bio-SCREW (Screw conveyor systems) are compact in design, and are easily adapted to congested locations for conveyance of materials in the horizontal, inclined, or vertical directions. They offer several advantages for environmental applications such as total enclosure of materials for odor and spillage control, and the ability to handle a wide variety of materials from wet to dry, and slow-moving to free-flowing.

Screw conveyors are available in a variety of materials of construction. The ability to have multiple entry and discharge points and many options for flow control often make this type of conveyor a key component of larger material handling systems.

JMS Bio-SCREW (Screw Conveyor System) Advantages

  • Shafted and shaftless designs available in several configurations and live bottom
  • Complete enclosure during conveyance eliminates spilling and odors, so less housekeeping is required
  • Perfect for congested locations
  • Wide range of capabilities, with multiple inlets and discharges as needed
  • Can handle high temperature, abrasive, and sticky materials
  • Wide capacity range, and can be used to mix or meter materials
  • Special safety features

JMS Advantages

  • Professional Engineers on staff
  • Integrated solutions provider
  • Use of Conveyor Analysis Design Software for conveyors of most any length, geometry, or drive configuration
  • CEMA manufacturer, JMS high level of CEMA involvement helps set standards for the future
  • Project management expertise
  • Experienced service personnel and OEM replacement parts available
  • Longevity with hundreds of conveyors currently in service

Why use a Screw Conveyor?

JMS is one of the largest and most established suppliers of screw conveyors for municipal and large industrial applications in North America. We use our extensive knowledge of conveyors and systems to provide custom solutions that can save dollars and maximize operational efficiency. JMS Bio-SCREW (Screw Conveyor System) are manufactured to accepted CEMA standards, taking advantage of JMS half century of design and manufacturing experience. JMS can design shafted screw conveyors or shaftless screw conveyors in multiple configurations to meet the needs of your process, and provide heat tracing and insulation if desired. Using the latest in materials and manufacturing technology, hundreds of JMS Bio-SCREW (Screw Conveyor System) conveyors are still in operation.

JMS Bio-SCREW (Screw Conveyor Systems) Key Features

JMS Bio-SCREW (Screw Conveyor system) covers


  • Numerous cover hold down mechanisms are available ranging from bolted to spring and toggle clamps
  • A full range of options allows JMS to configure equipment to meet your specific needs

JMS Bio-SCREW (Screw Conveyor system) end seal assembly

End Seal Assembly

  • Seal assembly prevents unwanted leakage at the shaft-trough interface
  • JMS has extensive experience in leak prevention and can assist you in specifying the best seal arrangement for your application

JMS Bio-SCREW (Screw Conveyor system) zero speed switch

Zero Speed Switch

  • Protects equipment and process
  • Contacting and non-contacting types available
  • Increase process reliability, and lower maintenance costs

JMS Bio-SCREW (Screw Conveyor system) drive assembly

Drive Assembly

  • Standoff bracket keeps conveyed material from entering the gearbox
  • Upgraded for heavy duty operation, and suitable for wash-down duty

JMS Bio-SCREW (Screw Conveyor system) bio-GATE (Slide Gate)

Bio-GATE (Slide Gate)

  • Used with screw conveyors that have multiple discharge points
  • Manufactured from stainless steel
  • Manual handwheel or an electric, pneumatic, or hydraulic actuator

JMS Bio-SCREW (Screw Conveyor system) bio-VALVE (Diverter Valve)

Bio-VALVE (Diverter Valve)

  • Consists of 2-way or 3-way diverter valve for solid materials
  • Manual chain wheel, handwheel, or an electric, pneumatic, or hydraulic actuator available

Learn more about the JMS Bio-SCREW (Screw Conveyor System) Key Features Today

JMS Bio-SCREW (Screw Conveyor System) Screw Types

Shafted Screws

JMS Bio-SCREW (Screw Conveyor system) shafted screw

Shafted Screw

A robust versatile option that can handle a variety of highly abrasive and viscous materials. The best choice for systems that need reversing capabilities.

JMS Bio-SCREW (Screw Conveyor system) CEMA 22 Hander Bearing

CEMA 22 Hanger Bearing

Designed for flush mounting inside the trough, this configuration promotes contaminant-proof operation and reduces the obstruction of material flow in high capacity conveyors.

JMS Bio-SCREW (Screw Conveyor system) fexible hanger bearing


Flexible Hanger Bearing

This special JMS stainless steel flexible element accommodates misalignment of the shaft and has a longer service life than a standard CEMA 226 journal bearing.

Shaftless Screws

JMS Bio-SCREW (Screw Conveyor system) shafless screw

Shaftless Screw

This design eliminates hanger bearings. Spirals are formed from nickel-alloy steel with high hardness providing a combination of corrosion and abrasion resistance.

JMS Bio-SCREW (Screw Conveyor system) liners


Specialty ultra-high molecular weight two color liners provide a visual indication of wear. Premium blends and abrasion resistant wear bars can also be used to extend working life.

JMS Bio-SCREW (Screw Conveyor system) end to end screw conveyor

End to End

Since no end bearing is required, two shaftless conveyors can be connected end to end, reducing required elevation and simplifying transfers.

Shafted Screw Conveyors vs Shaftless Screw Conveyors

Over the years, the use of screw conveyors in municipal wastewater plants has been popular for a combination of reasons. The full enclosure of the screw conveyor helps with two big housekeeping issues at the wastewater treatment plant; spilling of materials and odor control. Another reason many plants use screw conveyors is their compact design. The compact design allows for their use in tight and congested areas of the plants. In addition to this, their ability to handle a wide variety of materials also makes them a good choice. One question that a lot of engineers and plant people ask about screw conveyors is: “when should I use a shafted screw conveyor” or “when should I use a shaftless screw conveyor”? These are great questions and the answer should be investigated for each individual operation as they assess their day to day needs. Want to learn more about when to use a shafted screw conveyor vs a shaftless screw conveyor? You can learn more on the JMS Learning Center.

JMS Bio-SCREW (Screw Conveyor System) Success Story

JMS Bio-SCREW (Screw Conveyor System) Success Story

Tallahassee, FL is nestled in the rolling hills of northwest Florida. This area is the location of the 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 the quality of reuse water and to protect the water quality of Wakulla Springs. Under the guidance of engineering giant Hazen and Sawyer a plan was developed for upgrading the system. As a part of the process, biosolids are separated from the liquid and dried for eventual use as a Class A Biosolid.

Conveyance of biosolids within the dewatered sludge building and to the dryer building is an important part of the process. For the project, six JMS Bio-SCREW (Screw Conveyor System) conveyors of various lengths and configurations were purchased. After three years of operation, Warren Shepherd, a long-time manager of the Biosolids area, reports that all conveyors have been running full-time without issues and that he could not be more pleased with the equipment.

JMS Bio-SCREW (Screw Conveyor System) Photo Gallery

Similar JMS Products

JMS Bio-HOPPER (Live Bottom Hopper)

JMS Bio-VALVE (Diverter Valve)

JMS Bio-GATE (Slide Gate)