A novel conditioning process for enhancing dewaterability of waste activated sludge by combination of zero-valent iron and persulfate

Xu Zhou; Qilin Wang; Guangming Jiang; Peng Liu; Zhiguo Yuan

doi:10.1016/j.biortech.2015.02.088

A novel conditioning process for enhancing dewaterability of waste activated sludge by combination of zero-valent iron and persulfate

Xu Zhou
, Qilin Wang
, Guangming Jiang
, Peng Liu
, Zhiguo Yuan^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

135 Citations (Scopus)

Abstract

Improvement of sludge dewaterability is crucial for reducing the costs of sludge disposal in wastewater treatment plants. This study presents a novel conditioning method for improving waste activated sludge dewaterability by combination of persulfate and zero-valent iron. The combination of zero-valent iron (0-30. g/L) and persulfate (0-6. g/L) under neutral pH substantially enhanced the sludge dewaterability due to the advanced oxidization reactions. The highest enhancement of sludge dewaterability was achieved at 4. g persulfate/L and 15. g zero-valent iron/L, with which the capillary suction time was reduced by over 50%. The release of soluble chemical oxygen demand during the conditioning process implied the decomposition of sludge structure and microorganisms, which facilitated the improvement of dewaterability due to the release of bound water that was included in sludge structure and microorganism. Economic analysis showed that the proposed conditioning process with persulfate and ZVI is more economically favorable for improving WAS dewaterability than classical Fenton reagent. © 2015 Elsevier Ltd.

Original language	English
Pages (from-to)	416-420
Journal	Bioresource Technology
Volume	185
DOIs	https://doi.org/10.1016/j.biortech.2015.02.088
Publication status	Published - 1 Jun 2015
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

We acknowledge Australian Research Council for funding support through Discovery Project DP120102832. Mr. Xu Zhou acknowledges the scholarship support from China Scholarship Council.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Research Keywords

Advanced oxidization processes
Dewaterability
Persulfate
Waste activated sludge
Zero-valent iron

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10.1016/j.biortech.2015.02.088

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title = "A novel conditioning process for enhancing dewaterability of waste activated sludge by combination of zero-valent iron and persulfate",

abstract = "Improvement of sludge dewaterability is crucial for reducing the costs of sludge disposal in wastewater treatment plants. This study presents a novel conditioning method for improving waste activated sludge dewaterability by combination of persulfate and zero-valent iron. The combination of zero-valent iron (0-30. g/L) and persulfate (0-6. g/L) under neutral pH substantially enhanced the sludge dewaterability due to the advanced oxidization reactions. The highest enhancement of sludge dewaterability was achieved at 4. g persulfate/L and 15. g zero-valent iron/L, with which the capillary suction time was reduced by over 50\%. The release of soluble chemical oxygen demand during the conditioning process implied the decomposition of sludge structure and microorganisms, which facilitated the improvement of dewaterability due to the release of bound water that was included in sludge structure and microorganism. Economic analysis showed that the proposed conditioning process with persulfate and ZVI is more economically favorable for improving WAS dewaterability than classical Fenton reagent. {\textcopyright} 2015 Elsevier Ltd.",

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author = "Xu Zhou and Qilin Wang and Guangming Jiang and Peng Liu and Zhiguo Yuan",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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TY - JOUR

T1 - A novel conditioning process for enhancing dewaterability of waste activated sludge by combination of zero-valent iron and persulfate

AU - Zhou, Xu

AU - Wang, Qilin

AU - Jiang, Guangming

AU - Liu, Peng

AU - Yuan, Zhiguo

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2015/6/1

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N2 - Improvement of sludge dewaterability is crucial for reducing the costs of sludge disposal in wastewater treatment plants. This study presents a novel conditioning method for improving waste activated sludge dewaterability by combination of persulfate and zero-valent iron. The combination of zero-valent iron (0-30. g/L) and persulfate (0-6. g/L) under neutral pH substantially enhanced the sludge dewaterability due to the advanced oxidization reactions. The highest enhancement of sludge dewaterability was achieved at 4. g persulfate/L and 15. g zero-valent iron/L, with which the capillary suction time was reduced by over 50%. The release of soluble chemical oxygen demand during the conditioning process implied the decomposition of sludge structure and microorganisms, which facilitated the improvement of dewaterability due to the release of bound water that was included in sludge structure and microorganism. Economic analysis showed that the proposed conditioning process with persulfate and ZVI is more economically favorable for improving WAS dewaterability than classical Fenton reagent. © 2015 Elsevier Ltd.

AB - Improvement of sludge dewaterability is crucial for reducing the costs of sludge disposal in wastewater treatment plants. This study presents a novel conditioning method for improving waste activated sludge dewaterability by combination of persulfate and zero-valent iron. The combination of zero-valent iron (0-30. g/L) and persulfate (0-6. g/L) under neutral pH substantially enhanced the sludge dewaterability due to the advanced oxidization reactions. The highest enhancement of sludge dewaterability was achieved at 4. g persulfate/L and 15. g zero-valent iron/L, with which the capillary suction time was reduced by over 50%. The release of soluble chemical oxygen demand during the conditioning process implied the decomposition of sludge structure and microorganisms, which facilitated the improvement of dewaterability due to the release of bound water that was included in sludge structure and microorganism. Economic analysis showed that the proposed conditioning process with persulfate and ZVI is more economically favorable for improving WAS dewaterability than classical Fenton reagent. © 2015 Elsevier Ltd.

KW - Advanced oxidization processes

KW - Dewaterability

KW - Persulfate

KW - Waste activated sludge

KW - Zero-valent iron

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U2 - 10.1016/j.biortech.2015.02.088

DO - 10.1016/j.biortech.2015.02.088

M3 - RGC 21 - Publication in refereed journal

C2 - 25804531

SN - 0960-8524

VL - 185

SP - 416

EP - 420

JO - Bioresource Technology

JF - Bioresource Technology

ER -

A novel conditioning process for enhancing dewaterability of waste activated sludge by combination of zero-valent iron and persulfate

Abstract

Bibliographical note

Funding

UN SDGs

Research Keywords

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