Dewatering Bag – Efficient Solution for Sediment and Sludge Filtration

A Dewatering Bag, also known as a sediment filter bag or silt bag, is a geotextile product designed to filter and retain sediment, sludge, and suspended solids while allowing clean water to flow out. These bags are widely used in construction sites, industrial facilities, and municipal projects where water mixed with soil or silt needs to be discharged responsibly. Made from high-strength nonwoven or woven geotextile fabric, Dewatering Bags are available in various sizes and filtration ratings to suit different project scales and water conditions.

Commodity name： Dewatering Bag – Efficient Solution for Sediment and Sludge Filtration

Anti-corrosion

Convenient construction

Anti-aging

What Is a Dewatering Bag？

A dewatering bag, also known as a sediment filter bag or silt bag, is a geotextile container designed to filter sediment-laden water during dewatering operations. Made from high-strength, permeable nonwoven or woven geotextile fabric, the bag retains solids while allowing filtered water to escape.

Dewatering bags are commonly used in construction sites, dredging operations, stormwater management, and environmental cleanup projects to control sediment discharge and protect water quality.

Key Technical Specifications:

Material: Woven or nonwoven polypropylene (PP) geotextile
Sizes: Customizable (common: 1×2 m, 2×3 m, 3×5 m)
Filtration Efficiency: ≥ 80–95% (depending on fabric type)
Tensile Strength: ≥ 20–50 kN/m
Flow Rate: ≥ 0.1–0.3 L/s·m²
UV & Chemical Resistance: Excellent

Application Areas

Dewatering Bags are used across industries that require water management, environmental protection, or sediment control:

Construction Sites: For collecting and filtering sediment-laden water from excavation, trenching, or foundation work.

Mining and Quarry Operations: To separate fine particles from water runoff or slurry.

Municipal Drainage Projects: Used in stormwater control systems and canal maintenance to trap silt before water is discharged into natural bodies.

Industrial Wastewater Treatment: Efficiently removes sludge from industrial cleaning and processing.

Oil & Gas Fields: Ideal for managing drilling mud and contaminated water onsite.

The pores of the fabric can be used to quickly dehydrate the sludge, effectively intercept solid particles and filter out clean water, greatly improving the efficiency of sludge treatment. The bag can be flexibly laid according to the site shape, adapt to irregular landfill scenes, and simplify the dehydration construction process in complex terrain.

The separated clean water can be recycled, and the concentrated solids are easy to be disposed of in a centralized manner, significantly reducing the cost of waste treatment and the environmental load. The UV-resistant, acid- and alkali-resistant materials ensure long-term stability in the field. The dehydration process does not require additional energy consumption, and the operation and maintenance cost is extremely low.

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