Sludge dewatering with Titan Tubes, Dewatering on a Drying Bed: Clear Filtrate, Fast Drain-Down, and Repeatable Cycles
- Terravua
- Feb 17
- 3 min read
Effective sludge dewatering remains a major bottleneck for many wastewater treatment facilities — especially where drying beds can’t keep up with throughput or changing sludge characteristics. Terravua recently completed a Titan geotextile dewatering tube pilot demonstration on a client’s drying bed to validate performance under real operating conditions.
This case study covers the full system, sludge dewatering with Titan tubes: line tie-in, flow control valves, slab piping, and a polymer dosing skid to achieve consistent flocculation and reliable filtration.
Summary / Project Overview of sludge dewatering with Titan Tubes
The client required a reliable, efficient on-site method to reduce sludge moisture content and volume prior to disposal or further processing. Terravua implemented a pilot system combining:
Titan geotextile dewatering tube (pilot unit)
Tie-in to the existing sludge line
Bridging spool with valves for controlled routing and isolation
Piping across the drying bed slab to feed the tube
Polymer dosing skid for accurate polymer injection and consistent flocculation
The purpose of the pilot was to provide proof-of-performance and operational confidence before scaling.
Objectives
The pilot focused on:
Demonstrating stable sludge dewatering using the Titan tube
Proving that polymer conditioning improves filtration consistency and performance
Delivering controlled flow management through valves and dedicated piping
Providing clear visual confirmation of normal filtration behaviour during filling
Capturing measurable outcomes: drain time, fill height limit, water reduction, filtrate clarity
Ensuring safe pilot operation at a maximum fill height of ~1.5 m
Training the client team to operate the system independently
Solution & Installation
Terravua delivered a complete installation designed for real plant operation:
1) Sludge line tie-in
The system was tied into the client’s sludge line to ensure a stable, continuous feed source.
2) Bridging spool with valves (flow control + isolation)
A bridging spool and valves were installed to:
direct sludge to the tube when required,
isolate the system for shutdown or maintenance, and
maintain operational flexibility.
Customer line tie in to allow for regular operation
3) Piping across the drying bed slab
Dedicated piping was routed across the slab to position the feed correctly and keep the installation clean, safe, and repeatable.
4) Polymer dosing skid (critical performance element)
A polymer dosing skid was supplied and commissioned to inject polymer into the sludge stream. Accurate dosing is essential because it:
drives correct floc formation,
improves solids capture in the tube, and
stabilises filtration performance across changing sludge conditions.
What You See in the Video
The demo video shows the system running under normal full operation:
Sludge is pumped into the Titan tube at a controlled rate.
Water separates through the porous tube fabric (filtration).
Filtrate migrates externally along the tube surface and seam line.
At the seam termination area, filtrate exits as a steady, clear discharge.
A consistent clear discharge confirms:
filtration is active,
the tube fabric is performing correctly, and
the sludge mass is consolidating as intended.
Results / Outcomes
The pilot produced strong, measurable outcomes:
Drainage time (cycle readiness)
After a full pumping cycle, the tube drained down within ~4–5 hours, enabling repeated cycles within a typical operating day.
Maximum fill height (pilot operational limit)
The final supervised cycle reached approximately ~1.5 m, confirming safe operation at the pilot tube’s maximum height.
Water reduction (post-handover confirmation)
Two days post-handover, tube height reduced to approximately 200–250 mm, indicating roughly ~70% volume reduction.
Filtrate clarity (quality indicator)
Clear filtrate was observed during operation and remained clear post-handover, supporting consistent ongoing separation.
Training & Handover
Terravua trained the client’s operational team on:
operating procedure (start-up, filling, shutdown),
valve positions and routing control,
polymer dosing adjustments for variable sludge,
safety controls during filling and drain-down,
routine checks and basic troubleshooting.
The system was handed over with on-site supervision and operational guidance to ensure confident independent operation.
Final Notes + Next Steps
This pilot confirms that Titan tubes, when integrated with correct line control and polymer dosing, provide a practical and repeatable sludge dewatering process on a drying bed.
Next steps typically include:
scaling to additional tubes (parallel operation),
optimising polymer dosing setpoints for long-term use,
aligning pumping schedules to drain-down cycles,
expanding the piping layout if required.
Contact Terravua for Your Dewatering Pilot or Full Installation
If your drying beds aren’t performing or sludge volumes are increasing, Terravua can deliver a full engineered dewatering package:
Titan tubes / geobags
polymer dosing skids
pipework, manifolds, valves
commissioning + operator training
Contact Terravua to request a pilot demonstration or a full site-specific installation plan.
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