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QINFENG Custom FIBC manufacturer since 2001

Specialty bags

Dewatering FIBC

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.

Circumference 2-9 m Woven geotextile Top fill port or open top

  • Bag size
  • Fabric
  • Filling
  • Lifting loops
  • Dewatering big bag in woven geotextile, draining water while the solids stay in

Why use a Dewatering FIBC

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.

Working range

The Range It Is Rated For.

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.

/ 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.

Key benefits

What Dewatering FIBC is built for

  • Benefit

    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.

  • Benefit

    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.

  • Benefit

    Fits existing lifting equipment

    Top loops let the bag be lifted by forklift or crane once it has drained, with no separate handling frame.

  • Benefit

    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.

  • Benefit

    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.

  • Benefit

    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.

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Quality checks

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.

  • Sample Sampling
  • Inspection record Production
  • Sample Sampling
  • Inspection record Production

Where it fits

Where a Dewatering FIBC Works, and Where It Does Not.

Right answer whenSludge, 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 whenThe 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.

LimitationsNot 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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Applications

Where Dewatering FIBC is used

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.

  • 01

    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 flow and solids content rather than by a lift weight.

  • 02

    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 a prepared pad, and lifted out once drained.

Evidence

Evidence on file

  • Sample Sampling

    Fabric sample and trial bag used to confirm drainage and retention with the customer's material.

  • Inspection record Production

    Batch sheet recording fabric specification, seam stitch counts and bag dimensions.

Fabric specification sheets, batch records and trial bag results can be shared with a named buyer on request. Discharge compliance remains the customer's responsibility.

Before we quote

What to Send Us.

  • Material to be dewatered and its solids content
  • Volume per batch and how often
  • Chemistry and pH of the material
  • Lifting method and drained weight
  • Discharge route for the water

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