Geotube dewatering pumps slurry into a woven geotextile tube, lets the water filter out through the fabric, and leaves compacted solids behind. How it works, where it fits coastal protection, sludge and tailings jobs, and how to size the fabric.
A geotube is a large woven geotextile tube, filled by pumping slurry — dredged sediment, municipal or industrial sludge, mine tailings — directly through ports sewn into the fabric. The dewatering geotube itself does the separating: its woven geotextile filter is engineered with an apparent opening size (AOS) fine enough to retain solid particles and coarse enough to let free water pass through the weave under the hydraulic head generated by the pump. Water bleeds out through the fabric walls and drains away (or gets collected and treated), while the solids consolidate and cake inside. Because filling happens in stages — pump, let it dewater and settle, pump again — a single tube can take several fill cycles as the retained material shrinks and compacts, often to a fraction of its original volume and well above what a filter press or centrifuge reaches for the same capital cost. This is the core reason geosynthetic tubes replaced sludge lagoons and open drying beds on a lot of sites: no mechanical dewatering equipment to run, no operator standing over a press, and the containment doubles as the filter.
The same tube, filled with sand instead of sludge, becomes a structural element. Coastal protection geotube projects use stacked or single-row tubes as submerged breakwaters, groynes, dune cores and seawall backing — filled in place with dredged or trucked-in sand pumped through the same fill ports, so a shoreline crew gets a stable, self-weighted structure without importing rock armor. A properly specified geotube for coastal work needs a woven fabric with the tensile strength and seam strength to hold a full hydraulic fill without splitting, plus UV-stabilized yarn since these structures sit exposed on a beach or dune face for years, not buried. We've supplied geotextile tube dewatering project fabric for both the temporary sediment-control use and the permanent shoreline-structure use, and the fabric spec is different for each — a dewatering tube is optimized for filtration rate, a coastal tube is optimized for burst and UV life. Tell us which one you're building before you order rolls.
Municipal wastewater plants and industrial sites (paper mills, food processing, tanneries, mining wash plants) generate sludge that's mostly water by weight — hauling it wet is expensive and landfills often won't take it above a set moisture content. A geotextile filter bag or geotube parked on a lined pad next to the clarifier gets pumped directly from the sludge line; polymer conditioning ahead of the pump speeds flocculation so the fabric captures fines instead of blinding. Filtrate runs clear enough within the first fill to discharge or recirculate, and the retained cake dries in place over days to weeks depending on climate and sludge type. Smaller volumes — a few cubic meters at a time from a tank cleanout or a dredge spoil pocket — are a better fit for a single geotextile fabric bag rather than a full-length tube; the filtration principle is identical, just scaled down and easier to move once it's dewatered.
Tailings ponds carry their own long-term liability — dam failures at wet tailings storage facilities are exactly why regulators now push dewatered or filtered tailings as the safer disposal method. Geotube dewatering at a mine site works the same way as sludge dewatering but at industrial scale: tailings slurry from the process plant pumps into rows of large-diameter tubes on a lined containment pad, water decants and is reclaimed back into the process circuit, and the dewatered tailings cake gets stacked or trucked to a dry-stack facility instead of sitting behind an earthen dam. The fabric choice matters more here than almost anywhere else — tailings can be abrasive and chemically aggressive, so the woven geotextile needs the puncture and abrasion resistance to survive repeated hydraulic filling without the seams giving out. Pair the fill tube layout with a turbidity curtain at the decant discharge point if reclaimed water re-enters an open waterway, so any residual fines settle out before it does.
Three numbers drive the spec: the slurry's solids content and particle-size distribution (sets the AOS you need to retain fines without blinding the weave), the required tensile and seam strength (set by tube diameter, fill height and how many fill cycles you're planning), and total fabric volume (tube length × circumference × number of tubes). Geotextile bags price and geotextile tube price both scale mostly with fabric weight (gsm) and seam engineering, not with brand name — a heavier, high-tenacity woven fabric costs more per square meter but survives more fill cycles, so the per-cycle cost often comes out lower. We spec woven geotextile to your slurry test data (a simple jar test or lab AOS check is enough to start) and ship pre-fabricated geotube and geobag units cut and seamed to your fill ports and site dimensions, so nothing gets fabricated on-site.
Бесплатный гид по выбору геосинтетики и спецификациям
Марки материала, подбор толщины/плотности и диапазоны цен для вашего проекта — на вашу почту.
Free water drains within hours of a fill cycle; full consolidation to a stackable cake typically runs one to several weeks depending on sludge type, climate and how many fill-and-rest cycles the schedule allows. Fine, high-clay slurries take longer than sandy dredge spoil.
Same filtration principle — a woven geotextile filter bag retains solids and passes water — but a geobag is a single sewn unit sized for smaller, discrete volumes (a tank cleanout, a small dredge pocket), while a geotube is a long continuous tube filled through multiple ports along its length for large, ongoing slurry streams like a mine tailings line or a dredging project.
Yes — that's the point of dry-stack tailings dewatering. Slurry pumps into geotubes on a lined pad, decant water is reclaimed to the process circuit, and the dewatered cake is stacked or trucked, removing the standing-water impoundment that makes conventional tailings dams a failure risk.
Give us the slurry's particle-size distribution or a jar-test result and the fill pressure you're planning; we'll match apparent opening size (AOS) to retain your fines and specify tensile/seam strength for your tube diameter and number of fill cycles, then quote fabric weight and geotextile bags price against that spec rather than a generic gsm number.
Геомешки и геотубы Геотуба (геотекстильная труба для обезвоживания) — крупный готовый контейнер из тканого геотекстиля для обезвоживания осадка, удержания дноуглубительного грунта и береговых сооружений.
Геомешки и геотубы Геомешок — мешок из тканого или иглопробивного геотекстиля ПП/ПЭТ, заполняемый песком или грунтом для защиты берегов, дноуглубления и обезвоживания.
Геотекстиль Высокопрочная тканая геоткань (высокомодульная нить ПП / ПЭТ) по AASHTO M288 — для разделения, стабилизации и армирования под дорогами.
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