Opening size and permeability follow the solids and the flow
The range the dewatering construction is quoted on
Bags drain on the pad for days or weeks
Bags are laid on a prepared pad and drained in batches rather than fed continuously.
THE 4 PACKAGING RISKS THAT DECIDE THE SPEC IN WATER TREATMENT & ENVIRONMENTAL REMEDIATION.
Dewatering performance decides the job and depends on the material rather than on the bag alone. These are the four risks the filed workflows name.
Blinding Before The Bag Is Full
Too tight a fabric blinds over and stops draining; opening size must match the solids in the stream.
Fines Leaving With The Water
Too open a weave carries fines out with the water, a discharge-quality problem at the outlet.
Weight Unknown Until The Bag Is Full
Filled by pump, the weight is unknown until the bag holds water, and spoil varies along one dredge.
Draining Takes Space Outdoors
Bags hold the pad for days to weeks, and the fabric takes grit, shell and weeks of sun.
SPECIFIC APPLICATIONS & PROCESS FLOWS.
The dewatering setups written up for water-treatment, dredging and lagoon-cleaning contractors.
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.
Industrial Sludge Dewatering
Dewatering industrial sludge and sediment in geotextile bags: water has to leave, solids have to stay, and the…
TESTING, COMPLIANCE & QUALITY ASSURANCE.
What the sludge and sediment workflow asks us to hold to, and how each is checked.
1. Requirements & How We Verify Them
| Fabric And Opening Size | Fabric weight and opening size checked in-house against the agreed specification. |
|---|---|
| Seams And Base | Double-row stitched seams, the closed flat base and the filled dimensions checked per batch. |
| Drainage And Retention | Confirmed on a trial bag with your own material; the bag filters, it does not treat the water. |
Water Treatment & Environmental Remediation Quotation Checklist
- 1. Dredging method and batch volume:
- Pump or excavator, the volume one bag takes per fill, and how often a bag is filled.
- 2. Solids content and particle size of the sediment:
- Percentage solids and whether the spoil is sandy, silty or clay-rich, which sets the fabric opening size.
- 3. Space available for bags:
- The area that can be given to bags and the surface they sit on, because draining takes area and time.
- 4. Where the drained water goes:
- Return to the channel, to a treatment plant, or to a discharge point under your permit, and the condition it has to meet.
DELIVERED WATER TREATMENT & ENVIRONMENTAL REMEDIATION CASE STUDIES.
What was proposed in this industry, how it was validated and what is confirmed so far.
Dewatering Bags for a Municipal Water Treatment Contractor
Twenty geotextile dewatering bags for lagoon sludge at a municipal works: produced, inspected and shipped, with the site drainage trial still ahead.
Read Case Study →