Conditioning of wastewater sludge using freezing and thawing: Role of curing

Kai Hu; Jun-Qiu Jiang; Qing-Liang Zhao; Duu-Jong Lee; Kun Wang; Wei Qiu

doi:10.1016/j.watres.2011.08.064

Conditioning of wastewater sludge using freezing and thawing: Role of curing

Kai Hu, Jun-Qiu Jiang, Qing-Liang Zhao, Duu-Jong Lee, Kun Wang, Wei Qiu

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

112 Citations (Scopus)

Abstract

Freeze/thaw (F/T) treatment is an efficient pre-treatment process for biological sludges. When bulk sludge was frozen, tiny unfrozen regimes in the ice matrix were continuously dehydrated by surrounding ice fronts, termed as the "curing stage" This work demonstrated that the F/T treatment could not only enhance sludge dewaterability, but also solubilize organic matters from sludge matrix. Most enhancement of sludge dewaterability was achieved during bulk freezing stage, with the waste activated sludge more readily dewatered than the mixed sludges after treatment. Conversely, the freezing stage released only limited quantities of organic matters to liquid. Conversely, the curing contributed mostly on chemical oxygen demand (COD) solubilization and NH₃-N release. The crystallization of intra-aggregate moisture was claimed to damage cell membranes so to release intracellular substances to surroundings. The F/T treatment with sufficient curing is advised to effectively condition biological sludge as the feedstock of the following anaerobic digestion process. © 2011 Elsevier Ltd.

Original language	English
Pages (from-to)	5969-5976
Journal	Water Research
Volume	45
Issue number	18
DOIs	https://doi.org/10.1016/j.watres.2011.08.064
Publication status	Published - 15 Nov 2011
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].

UN SDGs

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

SDG 6 Clean Water and Sanitation

Research Keywords

Curing
Dewaterability
Freeze/thaw treatment
Mixed sludge
Solubilization
Waste activated sludge

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10.1016/j.watres.2011.08.064

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title = "Conditioning of wastewater sludge using freezing and thawing: Role of curing",

abstract = "Freeze/thaw (F/T) treatment is an efficient pre-treatment process for biological sludges. When bulk sludge was frozen, tiny unfrozen regimes in the ice matrix were continuously dehydrated by surrounding ice fronts, termed as the {"}curing stage{"} This work demonstrated that the F/T treatment could not only enhance sludge dewaterability, but also solubilize organic matters from sludge matrix. Most enhancement of sludge dewaterability was achieved during bulk freezing stage, with the waste activated sludge more readily dewatered than the mixed sludges after treatment. Conversely, the freezing stage released only limited quantities of organic matters to liquid. Conversely, the curing contributed mostly on chemical oxygen demand (COD) solubilization and NH3-N release. The crystallization of intra-aggregate moisture was claimed to damage cell membranes so to release intracellular substances to surroundings. The F/T treatment with sufficient curing is advised to effectively condition biological sludge as the feedstock of the following anaerobic digestion process. {\textcopyright} 2011 Elsevier Ltd.",

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T1 - Conditioning of wastewater sludge using freezing and thawing

T2 - Role of curing

AU - Hu, Kai

AU - Jiang, Jun-Qiu

AU - Zhao, Qing-Liang

AU - Lee, Duu-Jong

AU - Wang, Kun

AU - Qiu, Wei

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 - 2011/11/15

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N2 - Freeze/thaw (F/T) treatment is an efficient pre-treatment process for biological sludges. When bulk sludge was frozen, tiny unfrozen regimes in the ice matrix were continuously dehydrated by surrounding ice fronts, termed as the "curing stage" This work demonstrated that the F/T treatment could not only enhance sludge dewaterability, but also solubilize organic matters from sludge matrix. Most enhancement of sludge dewaterability was achieved during bulk freezing stage, with the waste activated sludge more readily dewatered than the mixed sludges after treatment. Conversely, the freezing stage released only limited quantities of organic matters to liquid. Conversely, the curing contributed mostly on chemical oxygen demand (COD) solubilization and NH3-N release. The crystallization of intra-aggregate moisture was claimed to damage cell membranes so to release intracellular substances to surroundings. The F/T treatment with sufficient curing is advised to effectively condition biological sludge as the feedstock of the following anaerobic digestion process. © 2011 Elsevier Ltd.

AB - Freeze/thaw (F/T) treatment is an efficient pre-treatment process for biological sludges. When bulk sludge was frozen, tiny unfrozen regimes in the ice matrix were continuously dehydrated by surrounding ice fronts, termed as the "curing stage" This work demonstrated that the F/T treatment could not only enhance sludge dewaterability, but also solubilize organic matters from sludge matrix. Most enhancement of sludge dewaterability was achieved during bulk freezing stage, with the waste activated sludge more readily dewatered than the mixed sludges after treatment. Conversely, the freezing stage released only limited quantities of organic matters to liquid. Conversely, the curing contributed mostly on chemical oxygen demand (COD) solubilization and NH3-N release. The crystallization of intra-aggregate moisture was claimed to damage cell membranes so to release intracellular substances to surroundings. The F/T treatment with sufficient curing is advised to effectively condition biological sludge as the feedstock of the following anaerobic digestion process. © 2011 Elsevier Ltd.

KW - Curing

KW - Dewaterability

KW - Freeze/thaw treatment

KW - Mixed sludge

KW - Solubilization

KW - Waste activated sludge

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DO - 10.1016/j.watres.2011.08.064

M3 - RGC 21 - Publication in refereed journal

C2 - 21925694

SN - 0043-1354

VL - 45

SP - 5969

EP - 5976

JO - Water Research

JF - Water Research

IS - 18

ER -

Conditioning of wastewater sludge using freezing and thawing: Role of curing

Abstract

Bibliographical note

UN SDGs

Research Keywords

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