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Low- and high-temperature thermal hydrolysis pretreatment for anaerobic digestion of sludge: Process evaluation and fate of emerging pollutants

Author

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  • Mirsoleimani Azizi, Seyed Mohammad
  • Haffiez, Nervana
  • Mostafa, Alsayed
  • Hussain, Abid
  • Abdallah, Mohamed
  • Al-Mamun, Abdullah
  • Bhatnagar, Amit
  • Dhar, Bipro Ranjan

Abstract

The thermal hydrolysis process is a cutting-edge, widely used technology for the pretreatment of sludge before anaerobic digestion. Previous review articles addressed the mechanisms, optimization, and advantages of thermal hydrolysis for sludge management; however, a holistic comparison between low-temperature and high-temperature thermal hydrolysis processes is still lacking. The review aims to comprehensively examine the impacts of both low-temperature and high-temperature thermal hydrolysis processes on sludge solubilization, subsequent anaerobic digestion process performance and produced biosolids quality. Further, current thermal hydrolysis-related challenges, such as inhibitory compounds and residual ammonia, and their possible solutions are discussed. Moreover, both types of thermal hydrolysis processes are critically evaluated from technical, energetic, and economic standpoints. This review sheds light on the impact of thermal hydrolysis pretreatment on the fate of various emerging pollutants in sludge, a topic overlooked in most previous review articles. Finally, this review highlights the research gaps worthy of coverage in future studies. By compiling and critically analyzing previous studies, this review aims to function as a comprehensive handbook for researchers looking to optimize the selection of the most suitable thermal hydrolysis process based on specific sludge conditions. Enhancing the efficiency of thermal hydrolysis in sludge anaerobic digestion holds the potential for improved sludge management, increased bioenergy recovery, and the generation of high-quality biosolids to address environmental and public health concerns associated with emerging pollutants. Consequently, this review aims to contribute to achieving multiple UN Sustainable Development Goals, including #7 Affordable and Clean Energy, #11 Sustainable Cities and Communities, and #13 Climate Action.

Suggested Citation

  • Mirsoleimani Azizi, Seyed Mohammad & Haffiez, Nervana & Mostafa, Alsayed & Hussain, Abid & Abdallah, Mohamed & Al-Mamun, Abdullah & Bhatnagar, Amit & Dhar, Bipro Ranjan, 2024. "Low- and high-temperature thermal hydrolysis pretreatment for anaerobic digestion of sludge: Process evaluation and fate of emerging pollutants," Renewable and Sustainable Energy Reviews, Elsevier, vol. 200(C).
    • Handle: RePEc:eee:rensus:v:200:y:2024:i:c:s136403212400176x
    DOI: 10.1016/j.rser.2024.114453
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