Galiana Aleixandre, MV.; Mendoza Roca, JA.; Bes-Piá, M. (2011). Reducing sulfates concentration in the tannery effluent by applying pollution
prevention techniques and nanofiltration. Journal of Cleaner Production. 19(1):91-98. doi:10.1016/j.jclepro.2010.09.006
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/103490
Title:
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Reducing sulfates concentration in the tannery effluent by applying pollution
prevention techniques and nanofiltration
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Author:
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Galiana Aleixandre, María Vicenta
Mendoza Roca, José Antonio
Bes-Piá, M.A.
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UPV Unit:
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Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear
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Issued date:
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Abstract:
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[EN] The use of large quantities of sulfuric acid and other sulfur-containing chemicals causes high sulfate concentrations in the wastewater of a tannery. The aim of this work was reducing the sulfate concentration in the ...[+]
[EN] The use of large quantities of sulfuric acid and other sulfur-containing chemicals causes high sulfate concentrations in the wastewater of a tannery. The aim of this work was reducing the sulfate concentration in the final wastewater from a tannery. For that, firstly a study about the main sulfate sources in a tannery was carried out and the total sulfates load in the tannery wastewater was evaluated. Two measures for sulfates reduction were studied: the recycling of unhairing wastewater to the soaking drums and the reuse of the chromium sulfate from the tanning washing wastewater after its separation by nanofiltration (NF). The first measure proposed was studied experimentally in laboratory drums of 5 L of volume. Two series of experiments with different volumes of unhairing wastewater in the soaking bath were carried out. The quality of the final leather was evaluated by means of mechanical tests. NF experiments were carried out in a laboratory pilot plant with a spiral wounded membrane element. Concerning the results, the combination of 50% unhairing wastewater and 50% of fresh water was appropriate in order to obtain leather with an acceptable quality. Besides, it drove to a diminution of approximately 10% in the addition of sulfide in the unhairing. Related to the NF experiments, 97% of the sulfates were rejected by the membrane. The separated ions could be recycled to the tanning drums. The application of the two measures (firstly the recycling of the unhairing wastewater and secondly the NF of the tanning washing wastewater) drove to a reduction of 14.82 kg SO 4 -2 t -1 of raw hide. © 2010 Elsevier Ltd. All rights reserved.
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Subjects:
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Nanofiltration
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Pollution prevention
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Sulfate reduction
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Tannery
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Wastewater recycling
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Fresh Water
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Mechanical tests
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Membrane elements
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Raw hide
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Sulfate concentrations
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Tannery effluent
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Tannery wastewater
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Unhairing wastewater
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Washing wastewater
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Chromium
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Effluents
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Experiments
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L eather
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Pilot plants
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Pollution
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Sulfur
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Sulfuric acid
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Tanning
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Washing
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Wastewater
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Water filtration
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Water recycling
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Wastewater reclamation
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Copyrigths:
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Cerrado |
Source:
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Journal of Cleaner Production. (issn:
0959-6526
)
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DOI:
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10.1016/j.jclepro.2010.09.006
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Publisher:
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ELSEVIER SCI LTD
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Publisher version:
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http://doi.org/10.1016/j.jclepro.2010.09.006
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Type:
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Artículo
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