Trident MD Press


The Trident Multi-Disc Press excels where conventional screw press dewatering units are limited by their design. Ineffective dehydration or increased maintenance are challenges that operators are too familiar with. The key to the Trident MD Press dewatering process is the “dewatering cylinder”. This cylinder can achieve thickening and pressing (dewatering) in a single integrated operation. The MD Press can take sludge as dilute as 0.1% solids directly from a treatment process, including an oxidation ditch or clarifier, and produce and cake of over 20% solids. Separate thickening, storage and conditioning processes are eliminated. In addition, human operators, power consumption and water for operational wash-down are significantly reduced.

Trident MD-press | MANURE SYSTEMS INC.

Dewaters and concentrates sludge from a biological process. The all-in-one construction makes it very compact and economical.

Trident Nutrient Recovery Process - Clean Water

Built with using the self-cleaning floating multi disks, the unit handles oily sludge without clogging and requires limited rinsing water to prevent clogging.

Specific Applications

The Trident MD Press has been designed to handle a wide range of sludge types. It is especially useful when sludge has a high oil and fat content (FOGS) that would bind filter materials and clog the process. Industrial and municipal applications include:

• Wastewater sludge from remote camp operations

• Food processing and wash-down wastes

• Oil sludge from machining operations

• Sludge from processed flowback water from oil and gas operations

• Sludge from tailings ponds for mining and oil and gas operations

• DAF float from animal manure and slaughterhouse waste

• • Wastes from textile processing

Features & Benefits

Unlike traditional screw presses, the Trident MD Press features a slow-speed, low wear screw within a unique “slip-disc” dewatering cylinder. Spacers and fixed rings are held in place on tie rods where the sliding rings, slightly smaller than the outer diameter of the screw and slightly narrower than the fixed rings, are gently moved by the screw. These sliding rings clean the fine gaps between the fixed rings and preventing clogging.

The moving rings also cut into the sludge cake creating additional surface area and the release of more moisture. The initial section of the dewatering cylinder is the thickening zone where the filtrate is discharged. The final section of the cylinder compresses and dewaters the sludge as the pitch of the screw narrows and the gaps between the rings decrease toward the end-plate where solids are discharged.

  • Easy installation and fully automated operation
  • Self-cleaning design for clog-free operation with minimal maintenance
  • Automated CIP spray bar for efficient wash water use
  • Requires minimal operator attendance
  • Effective filtration processes can achieve more than 20% dry matter
  • Low power consumption (up to 90% less than other dewatering technologies)
  • Low noise and odor generation
  • Built-in flocculation tank and mixer unit

Prior to the dewatering cylinder, the raw sludge is fed into a mixing tank where a polymer is thoroughly mixed. The sludge then passes through a flocculation tank where gentle mixing and flocculation occurs. From there, the sludge is channeled into the dewatering cylinder for pressing. The entire operation is controlled by the Trident MD Press control panel.

The Trident MD Press is designed to be a fully automated system capable of starting up, operating and shutting down with no operator intervention. In addition to controlling the Trident MD Dewatering System itself, the control panel is designed to automate the polymer feed system, the unit sludge feed pump, as well as any conveyors required to remove dewatered cake. All components of the dewatering system work together, automatically starting up, operating, and shutting down as required. KPD Consulting can provide complete systems or work with other suppliers to provide an integrated package. In addition, unit operating and alarm outputs for connection to plant PLC/SCADA systems are standard.

Manure management and nutrient recovery by MANURE SYSTEMS INC.

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