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Sludge Dewatering Press
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- Sludge Dewatering Press
- VOLUTE™ Dewatering Press MW Series
For sewage treatment plants using the activated sludge process
New technology authorized by Japan Sewage Works Agency
VOLUTE™ Dewatering Press MW Series
Treat mixed raw sludge using the standard activated sludge process. This model has a maximum throughput of 400 kg-DS/h and achieved stable operation with an automatic control function that responds to concentration fluctuation of the supplied sludge.

Advantages
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Maintainability improved -
Realize stable operation with control responding to concentration fluctuation -
Overhaul and replacement of consumable parts performed on-site in a short time -
Low Noise/Low Vibration -
Easy Operation & Maintenance -
Excellent expandability.
Additional cylinder unit can be added even after delivery
Realize Stable Operation with Control Responding to Concentration Fluctuation
In the treatment of mixed raw sludge, sludge properties such as sludge concentration and fibrous materials and those of seasonal sludge properties fluctuate greatly, which sometimes makes it difficult to adjust the operation of the sludge dewatering press, such as the amount of sludge fed and the amount of chemicals dosed.
In the MW series, a level sensor detects water level fluctuations in the flocculation tank, and even when the concentration of the sludge fed into the sludge dewatering press fluctuates (TS of 2.5 to 3.8%), the system automatically adjusts the amount of sludge fed into the filter to maintain that an amount of solids fed into the filter element is constant. This allows the operation with constant moisture content and filtration speed without changing the operation settings each time the concentration changes.

Life Cycle Costs can be Reduced
Life cycle costs can be reduced at any sewage treatment plant, regardless of the scale of sewage treatment.

Overhaul and Replacement of Consumable Parts Performed on-site in a Short Time
To maintain the dewatering performance and extend the service life of the sludge dewatering press, the consumable parts that make up the filtration zone need to be replaced periodically according to operating hours. Since the filtration zone has an independent structure, they can be easily replaced on-site without taking the machine back to our factory for replacement of consumable parts.
Parts replacement can be done in a short time; thus you can reduce the time required to shut down the sludge dewatering press.
Easy Operation & Maintenance
24-hour fully automatic unmanned operation is possible with an automatic operation control using various sensors. There is no need for manual startups or shutdowns whilst operating the machine.
Additionally, there aren’t many daily maintenance items, and on top of that, there are no complicated operations required.
Furthermore, it does not require any special knowledge or skills, making it an easy-to-use product.
Maintainability improved
A newly designed ring is employed to remove sludge without pulling the screw out of the machine, even in the event of a malfunction such as sludge clogging inside the machine.
This reduces the time required to restore operation and shut down the sludge dewatering press.

Expandable Throughput
The throughput of VOLUTE™ can be easily expanded with its Cylinder Unit. We are ready to meet your expectations, “We want to be prepared for the increase of sludge in the future, but without too much increase in the initial cost…”
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Low Noise/Low Vibration
As our product does not have a high-speed spinning unit, there is no need for noise or vibration
concerns, as such, no preventative measures need to be put in place for noise pollution.
Additionally, as there is no vibration from the machine itself, any kind of flooring modifications to accommodate vibrating machines will be unnecessary.
How the Clog-Free Mechanism Works
Process Flow

Thickening Flocculation Tank
Polymer and sluge are stirred and mixed, forming flocs suitable for VOLUTE™. Then, the built-in thickener in the tank instantly thicken the sludge.

Reactor Tank for Coagulant
Coagulant is added to the concentrated sludge, and mixe in this tank.

Cylinder Unit
Sludge is further thickened in the thickening zone of the cylinder, and then the inner pressure increased at the dewatering zone helps sludge being dewatered well.

Discharge Outlet for Dewatering Cake
Further pressure is applied from the outlet side with the End Plate, discharging dewatered cake with around 30% dry solids content.
Feel free to contact us. After collecting information about your treatment process, sludge volume, operating hours, and other conditions, we will select the most suitable model for your sludge and your concerns. During sample test, we will simulate the amount of chemicals to be dosed, the estimated water content of the dewatered cake, etc. Upon request, a pilot test can be performed at your wastewater treatment plant (for a fee). After determining the specifications and ancillary equipment, we will start producing the equipment. Our sales representative or service engineer will perform operational adjustments at your wastewater treatment plant and you will check how to operate the system before we hand over the equipment.
You may wonder, “Can the machine dewatering the sludge as desired?” or “ Is it difficult to operate the machine?”
In addition to eliminating concerns before purchase, you can also use our products as a replacement machine during the service period of an existing dewatering machine or during the construction period of a wastewater treatment facility.






