Exploitation of Fenton and Fenton-like reagents as alternative conditioners for alum sludge conditioning

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Title: Exploitation of Fenton and Fenton-like reagents as alternative conditioners for alum sludge conditioning
Authors: Tony, Maha A.
Zhao, Y.Q.
Tayeb, Aghareed M.
Permanent link: http://hdl.handle.net/10197/3135
Date: Jan-2009
Abstract: The use of Fenton’s reagent (Fe2+/H2O2) and Fenton-like reagents containing transition metals of Cu(II), Zn(II), Co(II) and Mn(II) for an alum sludge conditioning to improve its dewaterability was investigated in this study. The results obtained were compared with those obtained from conditioning the same alum sludge using cationic and anionic polymers. Experimental results show that Fenton’s reagent was the best among the Fenton and Fenton-like reagents for the alum sludge conditioning. A considerable effectiveness of capillary suction time (CST) reduction efficiency of 47% can be achieved under test conditions of Fe2+/H2O2 = 20/125 mg/gDS (Dry Solids) and pH = 6.0. The observation of floc-like particles after Fenton’s reagent conditioning of alum sludge suggests that the mechanism of Fenton’s reagent conditioning was different with that of polymer conditioning. In spite of the less efficiency in CST reduction of Fenton’s reagent in alum sludge conditioning compared with that of polymer conditioning, is less than that of polymer conditioning. This study provided an example of proactive treatment engineering which is aimed at seeking a safe alternative to the use of polymers in sludge conditioning towards achieving a more sustainable sludge management strategy.
Funding Details: Not applicable
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2009 Elsevier B.V.
Keywords: Alum sludge;Conditioning;Fenton and Fenton-like reagents;Organic polymers;Cost estimate
Subject LCSH: Water treatment plant residuals
Sewage sludge--Conditioning
Fenton's reagent
Polymers
DOI: 10.1016/S1001-0742(09)60018-8
Language: en
Status of Item: Peer reviewed
Appears in Collections:Centre for Water Resources Research Collection
Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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