Volume drops before haulage
Water leaves the bag on site, so the material that is finally moved and disposed of weighs and occupies far less.
Bag size
Circumference 2-9 m, height 1-2 m (typical)
Fabric
Woven geotextile, selected by opening size and permeability
Filling
Top fill port or open top
Lifting loops
Four corner loops, reinforced
Base
Closed flat base
Seams
Double-row stitched
What it settles: Treats the bag as a filter rather than a container: it explains the fabric and size decisions and states plainly that discharge compliance stays with the…
Best for: Sludge, sediment and dredgings where the site needs to reduce water content before haulage or disposal and has space to drain bags in batches.
Not the answer when: The material must stay fully contained with no discharge, the site has no space for a drainage pad, or the solids are too fine for a…
Confirm before quoting: Solids content and particle size, chemistry and pH, the volume per batch, the discharge route and its local rules, drained weight for lifting, and the space…
/ Overview & Principle
HOW THIS BAG IS BUILT
The body is sewn from a woven geotextile rather than from coated PP. The fabric is chosen for its opening size and permeability, so water passes through the weave while the solid fraction is retained inside the bag. Lifting loops are sewn into the top seam and the base is closed flat, because the bag has to hold a wet load without leaking at the base.
The two decisions that set the bag are the fabric and the size. Fabric opening size follows the solids you need to keep in, and the bag size follows the volume of sludge and the number of bags the site can handle at once. A dewatering bag is a filter first and a container second.
Operational summary:
A woven bag made with geotextile fabric so water drains out while the solids stay in. It is sized from the sludge, the flow and the containment requirement rather than from a working load alone.
/ Features
KEY DESIGN ADVANTAGES.
Solids stay where they belong
Fabric opening size is matched to the solids so the retained fraction stays in the bag instead of running off.
Fits existing lifting equipment
Top loops let the bag be lifted by forklift or crane once it has drained, with no separate handling frame.
Works as a batch process
Bags are filled, left to drain and then removed one by one, which suits sites with limited lagoon or pad space.
Drainage confirmed on your own material
A trial bag filled with your sludge is the normal way to confirm drainage and retention before a full order, because both follow your solids and chemistry.
Runs on a prepared pad, no lagoon needed
Bags drain where they are laid, so a site without lagoon capacity can run the same process in batches and lift each bag away.
/ Construction & Performance
WHAT DECIDES THE SPECIFICATION.
5 points decide how this bag is specified. Use the arrows, the dots, or a swipe.
/ Configurations
CUSTOM CONFIGURATIONS & SIZING.
- Bag size
- Circumference 2-9 m, height 1-2 m (typical) Size is set from the sludge volume and the space available to lay bags out to drain.
- Fabric
- Woven geotextile, selected by opening size and permeability The opening size follows the solids you must retain.
- Filling
- Top fill port or open top A fill port keeps the bag closed while a pump discharges into it.
- Lifting loops
- Four corner loops, reinforced Loops are sized for the drained weight, not the wet weight.
- Base
- Closed flat base The base seam is the main leakage risk and is checked on each batch.
- Seams
- Double-row stitched Seam type is chosen so the fabric does not pull out under a wet load.
- Drainage support
- Used on a prepared pad or in a frame Drainage rate depends on how the bag is supported, which is the site's decision.
/ Applications
WHERE THIS FAMILY IS QUOTED.
Industrial Sludge Dewatering
Dewatering industrial sludge and sediment in geotextile bags: water has to leave, solids have to stay, and the bag is sized by…
Dredging & Sediment Control
Dredged spoil, channel sediment and lagoon or settlement-pond silt dewatered in filter bags: filled by pump or excavator, drained in batches on…
/ Performance
PERFORMANCE, TESTING & LIMITS.
1. Performance & working envelope
| Rated range | Working range depends on the solids and the site: typical sludge projects use bags from about 2 m to 9 m circumference, filled in batches and left to drain for days or weeks. Retention and drainage figures are confirmed against a sample of your material rather than quoted from a table, because both depend on the solids and the chemistry. |
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2. How it is validated
| Testing | In-house checks cover fabric weight, opening size against the agreed specification, seam stitch counts and bag dimensions. A trial bag filled with the customer's own material is the normal way to confirm drainage and retention before a full order. Third-party testing is arranged on request. |
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3. Limits
| Where it is not the answer | Not a containment device for hazardous or regulated waste unless the whole system is designed for it: the bag drains, so anything dissolved in the water leaves with it, and local discharge rules remain the site's responsibility. Drainage also slows as the cake builds up, so the process needs space and time rather than a single pass. |
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Selection & Purchasing Guidance
- Best For:
- Sludge, sediment and dredgings where the site needs to reduce water content before haulage or disposal and has space to drain bags in batches.
- Consider Alternatives When:
- The material must stay fully contained with no discharge, the site has no space for a drainage pad, or the solids are too fine for a woven fabric to retain without a treatment step.
- Must Confirm Before Quoting:
- Solids content and particle size, chemistry and pH, the volume per batch, the discharge route and its local rules, drained weight for lifting, and the space available.
/ On site
SEEN ON SITE.
Loading, lifting and standing full — the working conditions the specification is written for. Use the arrows, or drag the rail.
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1000 x 625 px
Filled at the bagging line -
1000 x 625 px
Handled under the base -
1000 x 625 px
Lifted on the loops -
1000 x 625 px
Standing full in a yard -
1000 x 625 px
Base and seams after a load -
1000 x 625 px
Baled and stacked in the warehouse
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