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Sludge Dewatering Press
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- VOLUTE DUO™ Dewatering Press HR Series
For Water Treatment Plants
VOLUTE DUO™ Dewatering Press HR Series
Sludge generated through coagulation-sedimentation processes often contains a high proportion of inorganic matter, and filter press sludge dewatering equipment has conventionally been used for this type of sludge. With VOLUTE DUO™, filter washing and filter replacement are not required. Its energy-saving operation and water-saving design also help reduce running costs. VOLUTE DUO™ delivers stable dewatering performance while reducing the maintenance work and costs typically associated with sludge dewatering.
Advantages
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Clog-free self-cleaning mechanism -
No pre-thickening required (TS 0.5%〜) -
Long-life design significantly reduces replacement parts cost -
Applicable to a wide range of sludge types without blockage in the cylinder -
Power and water saving -
Easy Operation & Maintenance -
Also Suitable for Sludge Dewatering in Chemical Precipitation Processes
Clog-free Self-cleaning Mechanism
The equipment has a filter element that consists of alternating layers of fixed rings and vertically moving rings maintaining a gap between them, and two screws are threaded through the filter element to transfer and compact the sludge.
A clog-free self-cleaning mechanism is achieved in which the moving ring is driven by the external rod to clean the filter element gap.
The amount of cleaning water for preventing clogging is very small compared to other types of dewatering machines.
Applicable to a Wide Range of Sludge Types without Blockage in the Cylinder
Each of the two screws rotates inward within the filter element to transfer sludge while the screw flights break up materials that easily cause clogging.
The machine is hard to be clogged even with sludge containing highly fibrous or inorganic materials, thereby providing a stable dewatering performance.
Long-life Design Significantly Reduces Replacement Parts Cost
The ring is driven by the external rod to prevent contact between consumable parts such as Moving Rings and Screws.
The life of consumable parts has been dramatically extended, resulting in a significant reduction in consumables costs compared to our previous models.
VOLUTE DUO™ can also maintain high dewatering performance for a long time.
Power and Water Saving
Power-saving Operation
The screw that rotates inside the filtration unit of VOLUTE DUO™ operates at an extremely low speed of approximately 2 to 4 rpm, resulting in very low power consumption and economical operation.
Under the same treatment capacity conditions, power consumption can be reduced by approximately 87% compared with a centrifuge and by approximately 70% compared with a filter press.
Water-saving Design
VOLUTE DUO™ employs a unique self-cleaning mechanism to prevent clogging in the filter element, thereby eliminating the use of large amounts of cleaning water for clogging prevention.
Compared to a belt press dewatering machine and a screw press dewatering machine, both with the same throughput, the amount of cleaning water is about 1/38 and about 1/4, respectively.
No Pre-thickening Required
This machine has an integrated structure in which both thickening and dewatering are handled by a single filtration unit, allowing low-concentration sludge with a TS of approximately 0.5% to be fed directly without a pre-thickening stage. This helps reduce the construction and operating costs of thickening and storage systems.
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.
VOLUTE DUO™ Dewatering Press is Suitable for Nearly Any Type of Application
Process Flow
Inline Mixer
An inline mixer mounted in the piping causes sludge to react with polymer.
Flocculation Tank
Flocculated sludge and polymer are mixed to form flocs suitable for VOLUTE DUO™.
Cylinder Unit
Sludge is thickened at the thickening zone in the precedent stage and dewatered at the dewatering zone in the subsequent stage under increasing inner pressure.
Discharge Outlet for Dewatered Cake
Further pressure is applied from the outlet side with the end plate, discharging dewatered cake with 20% (+/-5%) 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.
