Role of indigenous iron in improving sludge dewaterability through peroxidation

Zhou, Xu, Jiang, Guangming, Wang, Qilin and Yuan, Zhiguo (2015) Role of indigenous iron in improving sludge dewaterability through peroxidation. Scientific Reports, 5 7516: 1-6. doi:10.1038/srep07516


Author Zhou, Xu
Jiang, Guangming
Wang, Qilin
Yuan, Zhiguo
Title Role of indigenous iron in improving sludge dewaterability through peroxidation
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2015-01-06
Year available 2015
Sub-type Article (original research)
DOI 10.1038/srep07516
Open Access Status DOI
Volume 5
Issue 7516
Start page 1
End page 6
Total pages 6
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Abstract Improvement of sludge dewaterability is important for reducing the total costs for the treatment and disposal of sludge in wastewater treatment plants. In this study, we investigate the use of hydrogen peroxide as an oxidizing reagent for the conditioning of waste activated sludge. Significant improvement to sludge dewaterability was attained after the addition of hydrogen peroxide at 30 mg/g TS and 28 mg/g TS under acidic conditions (pH = 3.0), with the highest reduction of capillary suction time being 68% and 56%, respectively, for sludge containing an iron concentration of 56 mg Fe/g TS and 25 mg Fe/g TS, respectively. The observations were due to Fenton reactions between the iron contained in sludge (indigenous iron) and hydrogen peroxide. For the sludge with an insufficient level of indigenous iron, the addition of ferrous chloride was found to be able to improve the sludge dewaterability. The results firstly indicated that indigenous iron can be utilized similarly as the externally supplied iron salt to improve sludge dewaterability through catalyzing the Fenton reactions.
Keyword Waste activated sludge
Fentons reagent
Biological sludges
Water treatment
Disintegration
Enhancement
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
Advanced Water Management Centre Publications
 
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