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Sustainability
Volume 12
Issue 19
10.3390/su12198129
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Article

Geotextile Tube Dewatering Performance Assessment: An Experimental Study of Sludge Dewatering Generated at a Water Treatment Plant

by
Maria Alejandra Aparicio Ardila
1,*,
Samira Tessarolli de Souza
1,
Jefferson Lins da Silva
1,
Clever Aparecido Valentin
1 and
Angela Di Bernardo Dantas
2
1
São Carlos School of Engineering (EESC), University of São Paulo (USP), São Carlos, São Paulo 13566-590, Brazil
2
Hidrosan Engenharia, São Carlos, São Paulo 13560-900, Brazil
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(19), 8129; https://doi.org/10.3390/su12198129
Submission received: 12 August 2020 / Revised: 15 September 2020 / Accepted: 22 September 2020 / Published: 2 October 2020
(This article belongs to the Collection Sustainability in Geotechnics: The Use of Environmentally Friendly Materials)
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Abstract

Using geotextile tubes as dewatering technology may significantly contribute to sustainable treatment of sludge generated in different industries, such as the water industry. This is an economical alternative for dewatering sludge from a Water Treatment Plant (WTP), which prevents sludge from being directly deposited in water bodies and makes it possible to then transfer the sludge to landfills. This paper presents a laboratory study and a statistical analysis, carried out to evaluate the geotextile tube dewatering of sludge from a WTP, discussing the relation between the independent variables (initial Total Solids (TS) of the sludge and polymer dosing) and dependent variables (performance indices used in the literature) evaluated using semi-performance tests. Sludge from a WTP and three different types of geotextiles bags were used. Changes in the geotextiles’ characteristics after dewatering were also evaluated, quantitatively using permittivity tests and qualitatively by Scanning Electron Microscopy (SEM). The results indicated turbidity of effluent that met the Brazilian regulations for the discharge of effluents into Class 2 water bodies, as well as higher percent-solids than those obtained with mechanical dewatering technologies. This study underscores the importance of semi-performance tests to understand dewatering in geotextile tubes.
Keywords: geosynthetics; geotextile tubes; sludge; dewatering; total solids; polymer dosing; response surface geosynthetics; geotextile tubes; sludge; dewatering; total solids; polymer dosing; response surface

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MDPI and ACS Style

Aparicio Ardila, M.A.; Souza, S.T.d.; Silva, J.L.d.; Valentin, C.A.; Dantas, A.D.B. Geotextile Tube Dewatering Performance Assessment: An Experimental Study of Sludge Dewatering Generated at a Water Treatment Plant. Sustainability 2020, 12, 8129. https://doi.org/10.3390/su12198129

AMA Style

Aparicio Ardila MA, Souza STd, Silva JLd, Valentin CA, Dantas ADB. Geotextile Tube Dewatering Performance Assessment: An Experimental Study of Sludge Dewatering Generated at a Water Treatment Plant. Sustainability. 2020; 12(19):8129. https://doi.org/10.3390/su12198129

Chicago/Turabian Style

Aparicio Ardila, Maria Alejandra, Samira Tessarolli de Souza, Jefferson Lins da Silva, Clever Aparecido Valentin, and Angela Di Bernardo Dantas. 2020. "Geotextile Tube Dewatering Performance Assessment: An Experimental Study of Sludge Dewatering Generated at a Water Treatment Plant" Sustainability 12, no. 19: 8129. https://doi.org/10.3390/su12198129

APA Style

Aparicio Ardila, M. A., Souza, S. T. d., Silva, J. L. d., Valentin, C. A., & Dantas, A. D. B. (2020). Geotextile Tube Dewatering Performance Assessment: An Experimental Study of Sludge Dewatering Generated at a Water Treatment Plant. Sustainability, 12(19), 8129. https://doi.org/10.3390/su12198129

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