Geobag dewatering of municipal waste sludge was a early and mature application. Most municipal sewage treatment plants store the generated sludge in ponds. Over time, there ponds are filled with sludge and needs clearn. Geobags are used extensively for dewatering sludge from these containment ponds. The effluent water is normally back to the ponds, and solids disposed of elsewhere.
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For the limited space available, many customers use small size geobags technology, which can put into ‘rectangle steel box’ and can be easy moved by truck. It is also called MDS dewatering system.
The mining of minerals will produce various types of waste. Such as tailings, mineral fines and processing sludge.
Large mining activities produce big amounts of tailings, which are stored in open tailings dams in isolated locations. However, small mines produce small tailings, which are close to population or environmentally sensitive areas.
The management of these tailings or their remediation are necessary, because in many cases the tailings have to be dewatered first before they can be rendered stable and inert. Geobag dewatering technology is implemented for this application.
The contaminated sediments are always come from industrial effluent waste that settle into rivers, lakes, ponds and streams within timeby. They are such as: PCBs, PCPs, PAHs, lead, copper, zinc, arsenic and etc. These contaminants are harmful to humans, animals and aquatic lifes.
Environmental dredging is the most common method of contaminated sediment remediation. The sediment is dredged and pumped(add coagulate/flocculate is recommended) into geobag dewatering bags and transported after weeks or months consolidation.
Many industrial processes produce waste which is stored in waste ponds on the industrial site. Over time these ponds fill with waste sludge, and have to be cleaned to continue function.
A common method of these waste reclamation is geobag dewatering tube pump the waste sludge from ponds and dispose of it in landfill or use it for other applications after dewatering and consolidation.
Chicken, Cattle and Pig farms produce large amount of waste, which is commonly stored in retention ponds. Over time there ponds are filled with sludge, and they have to be cleaned out periodically.
Animal waste is more fine than sewage waste, it normally has to be treated with coagulate and flocculate to ensure colloids and nutrients are contained within the geotextile dewatering bag during geobag dewatering technology.
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.
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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.
- Geotextile dewatering bags have efficient retention of solids
- They are easy to operate
- Geotextile dewatering bags are passive; i.e. they do not require frequent monitoring and maintenance of equipment
- 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.
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.
Contact us to discuss your requirements of dewatering geobag. Our experienced sales team can help you identify the options that best suit your needs.
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