Coagulant recovery from waterworks sludge by acid digestion method

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Mahdavian Seyede Elahe; Ostovar Fariba

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Journal Paper

Paper Information

Journal: JOURNAL OF ENVIRONMENTAL RESEARCH AND TECHNOLOGY Year:2018 | Volume:3 | Issue:4 Page(s): 31-39

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Information Journal Paper

Title

Coagulant recovery from waterworks sludge by acid digestion method

Author(s)

Mahdavian Seyede Elahe | Ostovar Fariba | Issue Writer Certificate

Keywords

Coagulant

Acid digestion

Water treatment plant

Sludge

Aluminum

Abstract

Coagulation is a process that increases the tendency of small particles in an aqueous suspension to attach to one another and to surfaces such as the media in a filter bed and is applied through mixing Coagulants such as Aluminum sulfate (alum), ferric chloride and polyAluminum chloride with raw water. Sludge containing Coagulant is formed after coagulation and through sedimentation of natural turbidity. Presence of high amounts of Coagulant in waterworks Sludge, increases environmental risks and disposal costs. Coagulants in Sludge have high economic value. Therefore, if these Coagulants recover, not only Sludge disposal risks but also expenses related to supply of fresh Coagulant in water or wasteWater treatment plant may decrease. In this paper, researches conducted by Acid digestion method for Coagulant recovery from waterworks Sludge are investigated. Amounts of Coagulant recovery, advantages and disadvantages and economic aspects of this method are studied. Results of the investigation showed that using sulfuric acid is the best option for conducting Acid digestion process because it is cheap and available. Moreover, if the purpose of recovering process is to achieve a recovered Coagulant with a similar quality to the commercial ones, Acid digestion method will not satisfy related standards.

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APA: Copy

Mahdavian, Seyede Elahe, & Ostovar, Fariba. (2018). Coagulant recovery from waterworks sludge by acid digestion method. JOURNAL OF ENVIRONMENTAL RESEARCH AND TECHNOLOGY, 3(4 ), 31-39. SID. https://sid.ir/paper/267639/en

Vancouver: Copy

Mahdavian Seyede Elahe, Ostovar Fariba. Coagulant recovery from waterworks sludge by acid digestion method. JOURNAL OF ENVIRONMENTAL RESEARCH AND TECHNOLOGY[Internet]. 2018;3(4 ):31-39. Available from: https://sid.ir/paper/267639/en

IEEE: Copy

Seyede Elahe Mahdavian, and Fariba Ostovar, “Coagulant recovery from waterworks sludge by acid digestion method,” JOURNAL OF ENVIRONMENTAL RESEARCH AND TECHNOLOGY, vol. 3, no. 4 , pp. 31–39, 2018, [Online]. Available: https://sid.ir/paper/267639/en

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