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Electrochemical pretreatment (EPT) of waste activated sludge : extracellular polymeric substances matrix destruction, sludge solubilisation and overall digestibility

Hao Huang, Qian Zeng, Philippe Heynderickx (UGent) , Guang-Hao Chen and Di Wu (UGent)
(2021) BIORESOURCE TECHNOLOGY. 330.
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Abstract
Anaerobic digestion (AD) of waste activated sludge (WAS) is widely used for stabilisation, mass reduction and resource recovery. However, AD performance is often hampered by the poor digestibility and slow degradation rate for WAS. A series of bench-scale tests was conducted using innovative electrochemical pretreatment (EPT) method to enhance the destruction of the extracellular polymeric substances (EPS) matrix and anaerobic digestibility. The results showed that the EPS matrix destruction was enhanced by 15?30% after EPT for 0.5 h at voltages of 8?15 V. The highest improvement in hydrolysis rate and overall digestibility was achieved at EPT of 15 V for 1.5 h, which was determined as 59% (from 0.27 to 0.43 d-1) and 28% (from 105 to 134 mL CH4/g VSSadded) respectively, compared with the WAS treatment without EPT. The economic analysis showed 1 h, 12 V EPT was more economically feasible.
Keywords
Renewable Energy, Sustainability and the Environment, Environmental Engineering, Waste Management and Disposal, Bioengineering, General Medicine, Electrochemical pretreatment, Sludge solubilisation, Extracellular polymeric substances destruction, Anaerobic digestion, Waste activated sludge

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MLA
Huang, Hao, et al. “Electrochemical Pretreatment (EPT) of Waste Activated Sludge : Extracellular Polymeric Substances Matrix Destruction, Sludge Solubilisation and Overall Digestibility.” BIORESOURCE TECHNOLOGY, vol. 330, 2021, doi:10.1016/j.biortech.2021.125000.
APA
Huang, H., Zeng, Q., Heynderickx, P., Chen, G.-H., & Wu, D. (2021). Electrochemical pretreatment (EPT) of waste activated sludge : extracellular polymeric substances matrix destruction, sludge solubilisation and overall digestibility. BIORESOURCE TECHNOLOGY, 330. https://doi.org/10.1016/j.biortech.2021.125000
Chicago author-date
Huang, Hao, Qian Zeng, Philippe Heynderickx, Guang-Hao Chen, and Di Wu. 2021. “Electrochemical Pretreatment (EPT) of Waste Activated Sludge : Extracellular Polymeric Substances Matrix Destruction, Sludge Solubilisation and Overall Digestibility.” BIORESOURCE TECHNOLOGY 330. https://doi.org/10.1016/j.biortech.2021.125000.
Chicago author-date (all authors)
Huang, Hao, Qian Zeng, Philippe Heynderickx, Guang-Hao Chen, and Di Wu. 2021. “Electrochemical Pretreatment (EPT) of Waste Activated Sludge : Extracellular Polymeric Substances Matrix Destruction, Sludge Solubilisation and Overall Digestibility.” BIORESOURCE TECHNOLOGY 330. doi:10.1016/j.biortech.2021.125000.
Vancouver
1.
Huang H, Zeng Q, Heynderickx P, Chen G-H, Wu D. Electrochemical pretreatment (EPT) of waste activated sludge : extracellular polymeric substances matrix destruction, sludge solubilisation and overall digestibility. BIORESOURCE TECHNOLOGY. 2021;330.
IEEE
[1]
H. Huang, Q. Zeng, P. Heynderickx, G.-H. Chen, and D. Wu, “Electrochemical pretreatment (EPT) of waste activated sludge : extracellular polymeric substances matrix destruction, sludge solubilisation and overall digestibility,” BIORESOURCE TECHNOLOGY, vol. 330, 2021.
@article{8701886,
  abstract     = {{Anaerobic digestion (AD) of waste activated sludge (WAS) is widely used for stabilisation, mass reduction and resource recovery. However, AD performance is often hampered by the poor digestibility and slow degradation rate for WAS. A series of bench-scale tests was conducted using innovative electrochemical pretreatment (EPT) method to enhance the destruction of the extracellular polymeric substances (EPS) matrix and anaerobic digestibility. The results showed that the EPS matrix destruction was enhanced by 15?30% after EPT for 0.5 h at voltages of 8?15 V. The highest improvement in hydrolysis rate and overall digestibility was achieved at EPT of 15 V for 1.5 h, which was determined as 59% (from 0.27 to 0.43 d-1) and 28% (from 105 to 134 mL CH4/g VSSadded) respectively, compared with the WAS treatment without EPT. The economic analysis showed 1 h, 12 V EPT was more economically feasible.}},
  articleno    = {{125000}},
  author       = {{Huang, Hao and Zeng, Qian and Heynderickx, Philippe and Chen, Guang-Hao and Wu, Di}},
  issn         = {{0960-8524}},
  journal      = {{BIORESOURCE TECHNOLOGY}},
  keywords     = {{Renewable Energy,Sustainability and the Environment,Environmental Engineering,Waste Management and Disposal,Bioengineering,General Medicine,Electrochemical pretreatment,Sludge solubilisation,Extracellular polymeric substances destruction,Anaerobic digestion,Waste activated sludge}},
  language     = {{eng}},
  pages        = {{10}},
  title        = {{Electrochemical pretreatment (EPT) of waste activated sludge : extracellular polymeric substances matrix destruction, sludge solubilisation and overall digestibility}},
  url          = {{http://doi.org/10.1016/j.biortech.2021.125000}},
  volume       = {{330}},
  year         = {{2021}},
}
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