Fate of extracellular polymeric substances of anaerobically digested sewage sludge during pre-dewatering conditioning with Acidithiobacillus ferrooxidans culture

Kumarasamy Murugesan; Balasubramani Ravindran; Ammaiyappan Selvam; Mayur B. Kurade; Shuk Man Yu; Jonathan W C WONG

doi:10.1016/j.biortech.2016.03.081

Fate of extracellular polymeric substances of anaerobically digested sewage sludge during pre-dewatering conditioning with Acidithiobacillus ferrooxidans culture

Kumarasamy Murugesan, Balasubramani Ravindran, Ammaiyappan Selvam, Mayur B. Kurade, Shuk Man Yu, Jonathan W C WONG^*

^*Corresponding author for this work

Department of Biology

Research output: Contribution to journal › Journal article › peer-review

26 Citations (Scopus)

Abstract

This study investigated the fate of extracellular polymeric substances (EPS) of anaerobically digested saline sewage sludge during its preconditioning. Sludge was conditioned with Acidithiobacillus ferrooxidans (AF) culture for 24 h in the presence and absence of Fe²⁺ as an energy substrate. pH decreased from 7.24 to 3.12 during sludge conditioning process. The capillary suction time (CST) of conditioned sludge significantly decreased to <10 s, and specific resistance to filtration (SRF) was reduced by >94% as compared with control within 4 h of conditioning with or without Fe²⁺, indicating a significant (P < 0.001) improvement in sludge dewaterability. A noticeable decrease in extractable EPS was observed in conditioned sludge. The EPS contents showed a significant negative correlation with dewaterability of sludge (P < 0.05). The results suggest that bioacidification treatment using A. ferrooxidans effectively improved sludge dewaterability through modification of sludge EPS.

Original language	English
Pages (from-to)	173-178
Number of pages	6
Journal	Bioresource Technology
Volume	217
DOIs	https://doi.org/10.1016/j.biortech.2016.03.081
Publication status	Published - 1 Oct 2016

Scopus Subject Areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

User-Defined Keywords

Acidithiobacillus ferrooxidans
Anaerobically digested sludge
Bioflocculant
Extracellular polymeric substances
Sludge dewaterability

UN SDGs

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

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10.1016/j.biortech.2016.03.081

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title = "Fate of extracellular polymeric substances of anaerobically digested sewage sludge during pre-dewatering conditioning with Acidithiobacillus ferrooxidans culture",

abstract = "This study investigated the fate of extracellular polymeric substances (EPS) of anaerobically digested saline sewage sludge during its preconditioning. Sludge was conditioned with Acidithiobacillus ferrooxidans (AF) culture for 24 h in the presence and absence of Fe2+ as an energy substrate. pH decreased from 7.24 to 3.12 during sludge conditioning process. The capillary suction time (CST) of conditioned sludge significantly decreased to <10 s, and specific resistance to filtration (SRF) was reduced by >94% as compared with control within 4 h of conditioning with or without Fe2+, indicating a significant (P < 0.001) improvement in sludge dewaterability. A noticeable decrease in extractable EPS was observed in conditioned sludge. The EPS contents showed a significant negative correlation with dewaterability of sludge (P < 0.05). The results suggest that bioacidification treatment using A. ferrooxidans effectively improved sludge dewaterability through modification of sludge EPS.",

keywords = "Acidithiobacillus ferrooxidans, Anaerobically digested sludge, Bioflocculant, Extracellular polymeric substances, Sludge dewaterability",

author = "Kumarasamy Murugesan and Balasubramani Ravindran and Ammaiyappan Selvam and Kurade, {Mayur B.} and Yu, {Shuk Man} and WONG, {Jonathan W C}",

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year = "2016",

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doi = "10.1016/j.biortech.2016.03.081",

language = "English",

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Fate of extracellular polymeric substances of anaerobically digested sewage sludge during pre-dewatering conditioning with Acidithiobacillus ferrooxidans culture. / Murugesan, Kumarasamy; Ravindran, Balasubramani; Selvam, Ammaiyappan et al.
In: Bioresource Technology, Vol. 217, 01.10.2016, p. 173-178.

Research output: Contribution to journal › Journal article › peer-review

TY - JOUR

T1 - Fate of extracellular polymeric substances of anaerobically digested sewage sludge during pre-dewatering conditioning with Acidithiobacillus ferrooxidans culture

AU - Murugesan, Kumarasamy

AU - Ravindran, Balasubramani

AU - Selvam, Ammaiyappan

AU - Kurade, Mayur B.

AU - Yu, Shuk Man

AU - WONG, Jonathan W C

PY - 2016/10/1

Y1 - 2016/10/1

N2 - This study investigated the fate of extracellular polymeric substances (EPS) of anaerobically digested saline sewage sludge during its preconditioning. Sludge was conditioned with Acidithiobacillus ferrooxidans (AF) culture for 24 h in the presence and absence of Fe2+ as an energy substrate. pH decreased from 7.24 to 3.12 during sludge conditioning process. The capillary suction time (CST) of conditioned sludge significantly decreased to <10 s, and specific resistance to filtration (SRF) was reduced by >94% as compared with control within 4 h of conditioning with or without Fe2+, indicating a significant (P < 0.001) improvement in sludge dewaterability. A noticeable decrease in extractable EPS was observed in conditioned sludge. The EPS contents showed a significant negative correlation with dewaterability of sludge (P < 0.05). The results suggest that bioacidification treatment using A. ferrooxidans effectively improved sludge dewaterability through modification of sludge EPS.

AB - This study investigated the fate of extracellular polymeric substances (EPS) of anaerobically digested saline sewage sludge during its preconditioning. Sludge was conditioned with Acidithiobacillus ferrooxidans (AF) culture for 24 h in the presence and absence of Fe2+ as an energy substrate. pH decreased from 7.24 to 3.12 during sludge conditioning process. The capillary suction time (CST) of conditioned sludge significantly decreased to <10 s, and specific resistance to filtration (SRF) was reduced by >94% as compared with control within 4 h of conditioning with or without Fe2+, indicating a significant (P < 0.001) improvement in sludge dewaterability. A noticeable decrease in extractable EPS was observed in conditioned sludge. The EPS contents showed a significant negative correlation with dewaterability of sludge (P < 0.05). The results suggest that bioacidification treatment using A. ferrooxidans effectively improved sludge dewaterability through modification of sludge EPS.

KW - Acidithiobacillus ferrooxidans

KW - Anaerobically digested sludge

KW - Bioflocculant

KW - Extracellular polymeric substances

KW - Sludge dewaterability

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DO - 10.1016/j.biortech.2016.03.081

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SN - 0960-8524

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Fate of extracellular polymeric substances of anaerobically digested sewage sludge during pre-dewatering conditioning with Acidithiobacillus ferrooxidans culture

Abstract

Scopus Subject Areas

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