Geotextile Tubes / Centrifuge / Belt Press / Rotary Drum
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What is a Geotextile tube?
A Geotextile
tube is constructed of permeable high strength woven Geotextile sewn
into a tube. It is generally hydraulically filled with a slurry of
water and soil, sand or a wide variety of other materials such as
contaminated marina sediment, inorganic industrial waste, waste
activated sludge, highly organic dredged material, pulp and paper
sludge.
Geotextile tubes dewater quickly and are used in
dewatering applications including sediment and industrial waste
dewatering, wastewater treatment biosolids and food processing waste.
Geotextile tubes work for dredged material management applications such
as containment/dewatering dredged materials, contaminated of
fine-grained materials, dike building and environmental restoration.
For coastal/river engineering applications, they can be used for
coastal dune cores, river regulation/diversion structures, bluff
protection and restoration and environmental restoration. Geotextile
tubes can be custom fabricated to meet jobsite space restrictions.
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Benefits of using Geotextile tubes include:
- Reduced disposal costs (solid waste vs. liquid waste)
- Greater flexibility of disposal options
- Reduced labor and maintenance compared to traditional methods
- Retention and containment of contaminated dredged materials
- Reduce volume to be trucked - less truckloads to the dump
- Neater operation and less odor
- Add geotechnical strength to poor soil for beneficial re-use
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Sludge
All sludges are different, and therefore different fabrics may be more or less appropriate for a particular job. When determining what type of fabric to use and how large your job will be, define the goals of the project, your budget, alternative methods, effluent cleanliness and the rate of dewatering. Important sludge parameters to think about include:
- Type of sludge
- Volume of sludge (gallons or cubic yards)
- Density of sludge
- Specific gravity of solids in sludge
- Percent solids of in situ sludge
- Bulking factor of sludge while pumping or dredging
- Percent solids during pumping
- Target percent solids after dewatering
- Pumping or dredging rate
- GPM
- Hours per day
- Days per year
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Hanging Bag Test
Before we implement
the use of a Geotextile tube for your job, we’ll first put your sludge
through a Hanging Bag Test. This test is a low cost and generally low
tech method of assessing the performance of a particular Geotextile
with a particular sludge. It can provide effluent for water quality
testing, demonstrate the dewatering concept, offers a first hand look
at the dewatering characteristics of the sludge and demonstrates the
effectiveness of polymer addition.
Hanging bags give an
indication of dewatering time and filtration efficiency and do not
replicate actual dewatering conditions in a tube. If the material
dewaters sufficiently in a bag, the process will work even better in a
tube, offering the results needed for effective dewatering.
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What is a Hanging Bag?
- A small bag fabricated from the same geotextiles used in the fabrication of large tubes
- loops provided for hanging from a pole, tree limb, fence post, etc.
- typical size is 5-ft circ and 3-ft long
- no seam at the bottom
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We furnish centrifuges for many different applications as well as parts, maintenance, and startups.
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A belt press is used by applying mechanical pressure to a chemically conditioned slurry squeezed between two tension belts and then over rollers. The water that is sqeezed out of the sludge is free to drain out the porous belt and the solids are then collected at the end of the machine.
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Thickening & Screening for all Applications
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