The Value of Chemical Conditioning with Geotextile Tube Dewatering

Gaffney, Douglas A.; Chambers, M.J.; Fatheringham, C.; Muñoz, R.

doi:10.1061/41165(397)220

Cited by 6 publications

(3 citation statements)

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“…Geotextile tubes filled with slurries can be laid out and stacked on an impermeable pad where the filtrate can be collected. Like other dewatering processes, reagent addition has been investigated to improve the quality of the filtrate and facilitate consolidation of the solids. − Geotextile tubes offer the rare advantage of completely enclosing residues, protecting them from fugitive dusting in windy conditions …”

Section: Design and Construction Of Stacked Tailings Facilitiesmentioning

confidence: 99%

Dewatered and Stacked Mine Tailings: A Review

et al. 2022

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Tailings storage is a prescient issue in mining, representing a visible and destructive liability. Dewatering tailings to a paste-like consistency is a popular option to reduce tailings volumes and increase dam safety, but dewatering further to a bulk cake consistency has mostly been reserved for small operations in locations where seismicity or terrain prohibited the construction of dams. The recent high-profile failures of tailings dams such at Fundão and Brumadinho facilities along with the push toward socially conscious investing have generated renewed and urgent interest in tailings dewatering, including stacked (“filtered” or “dry-stack”) tailings. While geochemistry and civil engineering topics relating to tailings in general are both extensively studied, very little academic literature is available specifically on stacked tailings, with discussion mostly confined to conference articles or extrapolation about the behavior of dewatered tailings. Furthermore, the nomenclature around and definition of this method of tailings storage is inconsistent, which can make researching the topic unnecessarily tedious and confusing and, in the worst case, can open the door to intentional misrepresentation of a tailings storage facility’s safety as this is a technology still being scaled up. In this article, the term stacked tailings (ST) is introduced to describe what has been otherwise called filtered tailings or dry-stack(ed) tailings to remedy the inaccuracies with the two existing names and gather the existing literature in one place. Topics covered include the existing definitions of dewatered and stacked tailings; opportunities and barriers to adoption; and construction and general operation for such tailings storage facilities. These are supplemented by an overview of literature in geotechnical and geochemical topics relevant to tailings dewatering (ex. clays) and tailings storage facilities. Emerging dewatering technologies and innovations which might be useful in the scaling up of the technology are also discussed. The aim is to provide a thorough background on the topic for a general audience, outline gaps in the literature, and encourage further exploration of stacked tailings and tailings cake by furnishing a comprehensive list of sources. Stacked tailings are discussed in a rigorous way to make the topic a more approachable way to encourage standardization and adoption, scale up, and the development of associated technologies.

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Section: Design and Construction Of Stacked Tailings Facilitiesmentioning

confidence: 99%

Dewatered and Stacked Mine Tailings: A Review

et al. 2022

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“…After conducting several tests of geotextile by different scientists ( [3,4,6,7]), we could analyse that geotextile has: 1. Good Filtration Efficiency 2.…”

Section: Chosing Geotextile For Dewatering Sludgementioning

confidence: 99%

Experimental Investigation of Dewatering of Dairy Sludge by Pressure Filter Using Geotextile and Alum, Nano Particles for Sludge Conditioning

Mattoo¹

2018

AJESE

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This paper presents the results of experimental work of dewatering by pressure filter using geotextile, aluminium sulphate and nanoparticles. In the present day, industries produce a lot of sludge for which open dumping is done, this causes several water borne diseases, bad odour, attraction of flies and land degradation. Sludge is the main cause for the former problems mentioned. In order to tackle these problems, dewatering of sludge was done by applying pressure and using geotextile, aluminium sulphate (as a sludge conditioning material), of dosages 550 mg/l, 600mg/l, 650mg/l, nanoparticles (as a sludge conditioning material), of dosages 50mg/l, 60mg/l, 70mg/l. In this paper comparison is made, of filtrate by using just geotextile, aluminium sulphate (6000mg/l) plus geotextile and nanoparticles (50mg/l) plus geotextile. Results show that chemical characteristics such as TSS, TVS, TS, COD, BOD, SO 4 has been reduced to 89.8%, 86.16%, 80.5%, 97.7%, 97.99%, 82.12% respectively with aluminium sulphate and 92.4%, 87.5%, 81.4%, 97.8%, 98.06%, 98.06%, 86.25% respectively with nanoparticles, so the filtrate can be recycled and filter cake obtained after dewatering was tested for NPK , therefore it can be used as a fertilizer, thus proving zero waste conditioning.

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“…One recent development in sediment management is the utilization of geotextile tubes, with or without chemical conditioning [11], to dewater various sediment-rich water flows. The technique has also reached the stormwater management sector [12][13][14].…”

Section: Introductionmentioning

confidence: 99%