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Iranian Journal of Environmental Health, Science and Engineering
Iranian Association of Environmental Health (IAEH)
ISSN: 1735-1979
Vol. 4, No. 1, 2007, pp. 29-36
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Bioline Code: se07005
Full paper language: English
Document type: Research Article
Document available free of charge
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Iranian Journal of Environmental Health, Science and Engineering, Vol. 4, No. 1, 2007, pp. 29-36
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EVALUATION OF INDUSTRIAL DYEING WASTEWATER TREATMENT WITH COAGULANTS AND POLYELECTROLYTE AS A COAGULANT AID
Nabi Bidhendi, G. R.; Torabian, A.; Ehsani, H. & Razmkhah, N.
Abstract
Textile industry is the major source of water consumption and wastewater pollution. There are various
treatment techniques to remove textile wastewater pollution. Coagulation-flocculation is a widely used
process to remove pollution due to suspended particles. In this research, different coagulants like Alum,
Lime, FeCl3, FeSO4 and MgCl2 were applied to select the suitable ones with optimum removal efficiency.
Settling characteristics of flocs formed in the coagulation process were studied in a laboratory scale
settling column unit. Parameters such as color, COD, TSS, turbidity and settled sludge volume have been
evaluated. The optimum coagulant dose and pH value were determined by comparing the effectiveness of
these coagulants. Results showed other coagulants except lime could eliminate color and COD
successfully. In this case, FeSO4 was chosen as an optimum coagulant for color removal because of the
lowest required coagulant dose, minimum settled sludge volume and maximum decolorization.
Keywords
Dye, color removal, coagulation, coagulants, textile wastewater, alum, lime
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© Copyright 2006 - Tehran University of Medical Sciences Publications Alternative site location: http://diglib.tums.ac.ir/pub/
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