dewatering bag

Geotextile Dewatering Bags Used for Desludging Wastewater Ponds

One interesting thing about technology is that it keeps evolving. All over the world, scientists, researchers, and manufacturers work on new methods to make a system more efficient, time-saving, less stressful, and eco-friendly.

In the construction sector, the use of geotextile dewatering bags for desludging wastewater ponds is recognized as the most economical and efficient method to improve the functionality and safety of wastewater treatment works during the desludging process.

 

What are Geotextile Dewatering Bags

Geotextile dewatering bags or geobags are an environment-friendly solution that allows water to flow out through the porous geotextile fabric of the bags while filtering any solids.

They are applicable in aquaculture, tailings dams, wastewater plants, industrial lagoons, mining applications, and sedimentation ponds. Certain geotextile bags are designed to retain all particles larger than 10 microns.

Although the woven fabric opening size appears to be slightly larger than the particle size of the dredged sludge material; however, this is combated by the formation of a filter cake within the fabric, with resultant effective retention of the solids.

As a result, an equivalent two-stage filter with filtration efficiencies above ninety percent is created for fine-grained material filtered via the high-strength woven geotextile bags.

The filtration properties of geotextiles make geobags ideal for desludging wastewater ponds.

The flowing liquid (effluent) that passes through the woven fabric can then be transferred to a designated safe disposal site that meets regulations set by the Department of Water and Sanitation e.g. the Policy and Strategy for Groundwater Quality Management set by the Department of Water and Sanitation.

Solid particles are separated from the effluent and either stored in a tailings storage facility at the wastewater treatment plant or transported to a designated safe disposal site.

The thread used to stitch the bags provides sufficient tensile strength to the geotextile bags to withstand the stresses they experience when pumping the material at high pressures.

 

Benefits of Using Dewatering Bags for Sludge Removal

  1. Geotextile dewatering bags have efficient retention of solids
  2. They are easy to operate
  3. Geotextile dewatering bags are passive; i.e. they do not require frequent monitoring and maintenance of equipment
  4. Compliance with cost optimization and environmental regulations

To date, Fibertex geotextile dewatering bags have proven to be an effective sludge dewatering solution. Fibertex geotextile dewatering bags are manufactured from Ultraviolet-stabilized woven geotextile materials i.e. Polypropylene (PP) geotextile materials.

PP is incorporated in the desludging process in wastewater treatment to convert wastewater into an effluent that can be returned to the water cycle with little environmental impact.

The Fibertex geosynthetics also encompasses nonwoven geotextiles as well as drainage pipes, gabions and mattresses, fittings and erosion control, and cellular confinement solutions.

Compared to conventional methods of desludging wastewater ponds which are not cost-effective, Fivertex geotextile has numerous advantages.

The Fibertex geotextile dewatering bag system is a cost-effective dewatering bag that simplifies the desludging wastewater process.

It is used in on-site sludge dewatering projects as it increases the space available in wastewater facilities for the additional waste.

 

An Environmentally-friendly Desludging Solution

This environmentally-friendly desludging solution also supplies soil reinforcing products, including geotextile installation, geocells, geogrids, and geosynthetic clay liners, as part of composite lining systems in modern landfills.

Manufacturers are looking at providing unique product design, impeccable manufacturing standards, using safe and reliable materials at a much lower cost.

The type of geotextile used will determine the duration of the dewatering and consolidation period, fill material, bag sizes, and site conditions. On average, it takes around 7 days for the bags to drain. 

Meanwhile, the solids are retained in the geobags and can then be used as fertilizer or safely disposed of as they are not reusable. Selecting the geobag size is dependent on two things:

  • the volume that needs to be removed from the tailings facility
  • the space available on site where the geobags will be placed

Gateway Structure has a reliable customer service team that will assist customers with in-depth studies on how to go about the desludging process. We can help you to determine the volume of waste that could be extracted from tailings dams per bag.

 

Wrapping Up

For many years, manufacturers and suppliers have had to deal with the limitations of using conventional methods of desludging wastewater ponds, including:

  • a large amount of space requirement
  • high cost
  • constant dredging
  • stringent environmental

Thanks to geotextile dewatering bags, waste containment through the desludging process can be achieved at a lower cost, with limited available space, and not restricted by budget constraints.