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Description: Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic...
Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment
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Description: Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic...
Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment

Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment

Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment

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Description: Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic...
Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment
Abstract
Hydrothermal liquefaction (HTL) is an emerging process that converts organic waste into a liquid biofuel, named biocrude, by means of water at elevated temperature and pressure. Recently, it became attractive for potentially replacing anaerobic digestion (AD) for municipal sludge treatment. This study assessed carbon and energy recovery from sludge by HTL at a wide range of reaction temperatures (290–360°C) and retention times (0–30 min). Considering much carbon is partitioned with the HTL aqueous phase during sludge treatment, AD was used for further energy recovery. Results suggested that mesophilic AD was more suitable for HTL aqueous treatment compared to thermophilic AD. Considering biocrude, hydrochar, and biogas from HTL aqueous, coupling HTL with AD can recover up to 87% of energy from municipal sludge. The results demonstrate that integrating the hybrid HTL–AD process could boost energy recovery from wastewater treatment plants with near-zero solids for final disposal.
The organic content makes municipal sludge an attractive source for energy recovery. Anaerobic digestion (AD) has been widely used for sludge treatment, but it has a limited capacity for energy recovery, solids reduction, and pathogen destruction. With hydrothermal liquefaction (HTL), up to 69% of energy can be recovered from sludge as biocrude that is upgradable to transportation fuels. Coupling HTL with AD for downstream HTL aqueous treatment recovers an additional 11% of energy as methane.
SpeakerLiu, Huan
Presentation time
16:30:00
16:50:00
Session time
15:30:00
17:00:00
SessionImproving Biosolids Treatment Efficiency
Session locationRoom S403b - Level 4
TopicEnergy Production, Conservation, and Management, Intermediate Level, Research and Innovation
TopicEnergy Production, Conservation, and Management, Intermediate Level, Research and Innovation
Author(s)
Liu, Huan
Author(s)H. Liu 1; I. Basar 2 ; N. Lyczko 3; A. Nzihou 3; C. Eskicioglu 4; H. Liu 1;
Author affiliation(s)UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia 1; UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia 2 ; Université de Toulouse, IMT Mines Albi, RAPSODEE CNRS UMR 5302, Campus Jarlard, F.81013 Albi Cedex 09, France 3; Université de Toulouse, IMT Mines Albi, RAPSODEE CNRS UMR 5302, Campus Jarlard, F.81013 Albi Cedex 09, France 3; UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia 4; 1;
SourceProceedings of the Water Environment Federation
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Oct 2023
DOI10.2175/193864718825159036
Volume / Issue
Content sourceWEFTEC
Copyright2023
Word count15

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Description: Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic...
Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment
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Description: Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic...
Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment
Abstract
Hydrothermal liquefaction (HTL) is an emerging process that converts organic waste into a liquid biofuel, named biocrude, by means of water at elevated temperature and pressure. Recently, it became attractive for potentially replacing anaerobic digestion (AD) for municipal sludge treatment. This study assessed carbon and energy recovery from sludge by HTL at a wide range of reaction temperatures (290–360°C) and retention times (0–30 min). Considering much carbon is partitioned with the HTL aqueous phase during sludge treatment, AD was used for further energy recovery. Results suggested that mesophilic AD was more suitable for HTL aqueous treatment compared to thermophilic AD. Considering biocrude, hydrochar, and biogas from HTL aqueous, coupling HTL with AD can recover up to 87% of energy from municipal sludge. The results demonstrate that integrating the hybrid HTL–AD process could boost energy recovery from wastewater treatment plants with near-zero solids for final disposal.
The organic content makes municipal sludge an attractive source for energy recovery. Anaerobic digestion (AD) has been widely used for sludge treatment, but it has a limited capacity for energy recovery, solids reduction, and pathogen destruction. With hydrothermal liquefaction (HTL), up to 69% of energy can be recovered from sludge as biocrude that is upgradable to transportation fuels. Coupling HTL with AD for downstream HTL aqueous treatment recovers an additional 11% of energy as methane.
SpeakerLiu, Huan
Presentation time
16:30:00
16:50:00
Session time
15:30:00
17:00:00
SessionImproving Biosolids Treatment Efficiency
Session locationRoom S403b - Level 4
TopicEnergy Production, Conservation, and Management, Intermediate Level, Research and Innovation
TopicEnergy Production, Conservation, and Management, Intermediate Level, Research and Innovation
Author(s)
Liu, Huan
Author(s)H. Liu 1; I. Basar 2 ; N. Lyczko 3; A. Nzihou 3; C. Eskicioglu 4; H. Liu 1;
Author affiliation(s)UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia 1; UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia 2 ; Université de Toulouse, IMT Mines Albi, RAPSODEE CNRS UMR 5302, Campus Jarlard, F.81013 Albi Cedex 09, France 3; Université de Toulouse, IMT Mines Albi, RAPSODEE CNRS UMR 5302, Campus Jarlard, F.81013 Albi Cedex 09, France 3; UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia 4; 1;
SourceProceedings of the Water Environment Federation
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Oct 2023
DOI10.2175/193864718825159036
Volume / Issue
Content sourceWEFTEC
Copyright2023
Word count15

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Liu, Huan. Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment. Water Environment Federation, 2023. Web. 6 Oct. 2025. <https://www.accesswater.org?id=-10097548CITANCHOR>.
Liu, Huan. Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment. Water Environment Federation, 2023. Accessed October 6, 2025. https://www.accesswater.org/?id=-10097548CITANCHOR.
Liu, Huan
Mining Energy from Wastewater: Coupling Hydrothermal Liquefaction and Anaerobic Digestion for Municipal Sludge Treatment
Access Water
Water Environment Federation
October 2, 2023
October 6, 2025
https://www.accesswater.org/?id=-10097548CITANCHOR