- Increased bowl speed & super-deep pond for improved solid-liquid separation
- Modular design: flexible application for high solids content
- Low-maintenance design with improved housing seal and folding belt guard
Engineered to Win: The FW400 HTS for Sludge Dewatering
Our FW400 HTS decanter centrifuge from Flottweg is specifically designed for the efficient dewatering of sewage sludge and supports sewage treatment plants in cost-effective and reliable sludge treatment. Sludge dewatering is a key step in reducing volume, simplifying handling, and significantly lowering transportation and disposal costs. Furthermore, effective sludge treatment helps minimize environmental impact by reducing the volume of sludge disposed of and conserving resources.
The FW400 HTS offers state-of-the-art separation technology to significantly reduce sludge volume while efficiently and economically processing a wide variety of sludge types. It handles both municipal and industrial sewage sludge, which can have different properties and solids content depending on their origin. With innovative features, high flexibility, and a user-friendly design, the FW400 HTS sets new standards in sewage sludge dewatering. As the newest member of the decanter product range, it offers forward-looking solutions for a wide range of requirements and helps sewage treatment plants make their processes more sustainable, efficient, and cost-effective.
Performance Boost
- Low operating costs thanks to higher dewatering efficiency and reduced disposal costs
- Increased torque and open grid structure for improved performance and energy efficiency
- Reduced energy consumption and ecological footprint thanks to Performance Boost and Super-Deep Pond
Flex Concept
- Modular design enables customization and a wide range of options
- Additional taper angle enhances versatility and operational reliability
- Upgradeability and flexibility thanks to modular design and a wide range of options
Human-Centered Design
- Improved housing seal protects against environmental influences and reduces downtime
- Foldable belt guard allows for easy access for maintenance and repair
- Low-noise design improves working conditions and promotes ergonomic operation
How the FW400 HTS Works
The digested sludge is fed directly from the digester into the FW400 HTS decanter centrifuge. There, dewatering takes place using centrifugal force, which increases the dry matter content of the sludge from approximately 2 to 6% to a value between 25 and 35%.
The FW400 HTS was specifically designed to meet the demanding requirements of sewage sludge dewatering and is capable of efficiently processing both digested sludge and excess sludge.
Thanks to its robust construction and optimized separation performance, it enables cost-effective and reliable processing that significantly improves the entire sludge treatment process. Thus, the machine not only contributes to volume reduction but also optimizes handling and sustainably reduces costs for transport and disposal.
You can find more information about how our decanters work here.
Technical Data
Dimensions [mm/ft] | 3650x1200x1100 / 11,97×3,94×3,61 |
Weight [kg/lb] | 2900 – 3100 / 6,393 – 6,834 |
Typical fields of application for the FW400 HTS
Advanced machine features take efficiency to a whole new level
Thanks to the integrated Performance Boost, operators benefit from increased throughput and improved separation results while simultaneously reducing resource consumption. Another highlight is the Human-Centered Design: The machine was specifically tailored to user needs and simplifies both daily operation and maintenance.
With the Flex Concept, Flottweg also offers a modular design that ensures maximum flexibility. The machine can be flexibly integrated into existing plants and customized to meet various customer requirements.
Features of the FW400 HTS
Flottweg Decanter Scroll
The decanter scroll conveys the solids deposited against the bowl wall by centrifugal force toward the conical end of the bowl at an optimal differential speed. This determines the residence time of the solids and influences the total dry solids. Various scroll designs allow for flexible adaptation to different products and processes.
Overflow Weir
The overflow weir from Flottweg allows for precise adjustment of the pond depth in the decanter centrifuge. This enables the system to be flexibly adapted to process changes and significantly improves separation performance—all without disassembly.
Differential Speed
The differential speed between the decanter bowl and the screw conveyor determines the retention time and compaction of the solids, and thus the total dry solids. It is variably adjustable to ensure optimal separation results for varying product characteristics.
Pond Depth
The pond depth affects the retention time of the liquid and thus the length of the clarification and drying zones. By adjusting the weir plates while the system is at a standstill, this can be specifically adjusted to optimize separation performance.
Lubrication
To ensure the service life of decanter centrifuges, Flottweg offers specially formulated lubricants. The Endrive gear oil ensures long-lasting drive performance with excellent wear protection and helps save energy. The Sympact roller bearing grease protects friction points and increases the service life of the bearings.
Recuvane®
The Recuvane® system lowers the operating costs of a decanter centrifuge by reducing energy consumption by 10 to 20%. It reclaims the rotational energy lost during the pressureless discharge of the liquid and assists the main drive. The mechanically robust system allows for the adjustment of multiple pond depths and typically pays for itself within a few months to two years.