Author: Arafat, Hassan A.

Source: Journal of Environmental Engineering and Science, Volume 6, Number 1, January 2007 , pp. 115-122(8)

Publisher: NRC Research Press

Abstract:

In this work, different treatment methods for wastewater from textile washing operations in the Palestinian territories were studied. The goal of the treatment process was to enable the textile industry to reuse the wastewater in textile washing through simple, efficient, and cost-effective methodologies. Actual textile wastewater samples from local textile factories were used and were found to be highly polluted. The study focused on three main processes; sedimentation, coagulation, and adsorption. While sedimentation was found to reduce the total suspended solids (TSS) of the wastewater, coagulation had the additional advantages of lowering the chemical oxygen demand (COD) and achieving higher filtration rates. Four coagulants were tested, ferric chloride, ferrous sulfate plus lime, aluminum sulfate, and aluminum sulfate plus lime. While ferric chloride failed to perform effectively as a coagulant, the other three coagulants were fairly effective. Finally, to further lower the COD of post-coagulation treated water, adsorption using activated carbon was studied. It was found that carbon was effective in reducing the COD of the wastewater using reasonable quantities, where up to 98% COD reduction was achieved using 6 g carbon/L.Key words: textile, wastewater, treatment, coagulation, sedimentation, adsorption.

Cet article présente diverses méthodes de traitement des eaux usées provenant d'opérations de lavage de textiles dans les territoires palestiniens. Le but de ce procédé de traitement était de permettre à l'industrie des textiles de réutiliser les eaux usées du lavage des textiles en utilisant des techniques simples, efficaces et économiques. De vrais échantillons d'eaux usées de textiles provenant des usines de textiles locales ont été utilisés et se sont avérés hautement pollués. L'étude porte sur trois procédés principaux : la sédimentation, la coagulation et l'adsorption. Bien que la sédimentation réduise le TSS dans les eaux usées, la coagulation présentait des avantages additionnels d'abaisser la DCO et d'obtenir des taux de filtration plus élevés. Quatre coagulants ont été mis à l'essai : le chlorure ferrique, le sulfate ferreux avec chaux, le sulfate d'aluminium et le sulfate d'aluminium avec chaux. Alors que le chlorure ferrique n'était pas un coagulant efficace, les trois autres coagulants ont été relativement efficaces. Finalement, l'adsorption sur charbon activé a été examinée afin d'abaisser encore plus la DCO de l'eau traitée après coagulation. En quantités raisonnables, le charbon s'est avéré efficace pour réduire la DCO des eaux usées; une réduction de la DCO atteignant 98 % a été réalisée en utilisant 6 g charbon/L.Mots clés : textiles, eaux usées, traitement, coagulation, sédimentation, adsorption.[Traduit par la rédaction]

Document Type: Research article

Publication date: 2007-01-01

More about this publication?

• Since January 2002, NRC Research Press has published the Journal of Environmental Engineering and Science. During the seven-year history of the journal, the co-editors, Dr. Donald S. Mavinic and Dr. Daniel W. Smith, built a high-quality journal that was well respected by its community of researchers in Canada and around the world. The last issues of the Journal of Environmental Engineering and Science was published in November 2008 together with a supplement.

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