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Improvement of energy recovery from the digestion of waste activated sludge (WAS) through intermediate treatments: The effect of the hydraulic retention time (HRT) of the first-stage digestion

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  • Ruffino, Barbara
  • Cerutti, Alberto
  • Campo, Giuseppe
  • Scibilia, Gerardo
  • Lorenzi, Eugenio
  • Zanetti, Mariachiara

Abstract

Reduced biodegradability of waste activated sludge (WAS) limits the production of methane and the consequent energy recovery in an anaerobic digestion (AD) process. Pre-treatments are a solution to increase the biodegradability of bacteria cell biomass, but a large part of poorly degradable organic matter is left after digestion. The utilization of intermediate hydrolysis treatments (IHTs) may help in converting even the most recalcitrant parts of organic matter in methane.

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  • Ruffino, Barbara & Cerutti, Alberto & Campo, Giuseppe & Scibilia, Gerardo & Lorenzi, Eugenio & Zanetti, Mariachiara, 2019. "Improvement of energy recovery from the digestion of waste activated sludge (WAS) through intermediate treatments: The effect of the hydraulic retention time (HRT) of the first-stage digestion," Applied Energy, Elsevier, vol. 240(C), pages 191-204.
    • Handle: RePEc:eee:appene:v:240:y:2019:i:c:p:191-204
    DOI: 10.1016/j.apenergy.2019.02.061
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    References listed on IDEAS

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    1. Yuan, Tian & Cheng, Yanfei & Zhang, Zhenya & Lei, Zhongfang & Shimizu, Kazuya, 2019. "Comparative study on hydrothermal treatment as pre- and post-treatment of anaerobic digestion of primary sludge: Focus on energy balance, resources transformation and sludge dewaterability," Applied Energy, Elsevier, vol. 239(C), pages 171-180.
    2. Zhen, Guangyin & Lu, Xueqin & Kato, Hiroyuki & Zhao, Youcai & Li, Yu-You, 2017. "Overview of pretreatment strategies for enhancing sewage sludge disintegration and subsequent anaerobic digestion: Current advances, full-scale application and future perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 559-577.
    3. Wang, Jie & Li, Yongmei, 2016. "Synergistic pretreatment of waste activated sludge using CaO2 in combination with microwave irradiation to enhance methane production during anaerobic digestion," Applied Energy, Elsevier, vol. 183(C), pages 1123-1132.
    4. Cano, R. & Pérez-Elvira, S.I. & Fdz-Polanco, F., 2015. "Energy feasibility study of sludge pretreatments: A review," Applied Energy, Elsevier, vol. 149(C), pages 176-185.
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    1. Fernández-Polanco, D. & Aagesen, E. & Fdz-Polanco, M. & Pérez-Elvira, S.I., 2021. "Comparative analysis of the thermal hydrolysis integration within WWTPs as a pre-, inter- or post-treatment for anaerobic digestion of sludge," Energy, Elsevier, vol. 223(C).
    2. Adrian Gonzalez & Hongxiao Guo & Oscar Ortega-Ibáñez & Coert Petri & Jules B. van Lier & Merle de Kreuk & Alexander Hendriks, 2020. "Mild Thermal Pre-Treatment of Waste Activated Sludge to Increase Loading Capacity, Biogas Production, and Solids’ Degradation: A Pilot-Scale Study," Energies, MDPI, vol. 13(22), pages 1-18, November.
    3. Lam, Chor Man & Hsu, Shu-Chien & Alvarado, Valeria & Li, Wing Man, 2020. "Integrated life-cycle data envelopment analysis for techno-environmental performance evaluation on sludge-to-energy systems," Applied Energy, Elsevier, vol. 266(C).
    4. Ruffino, Barbara & Cerutti, Alberto & Campo, Giuseppe & Scibilia, Gerardo & Lorenzi, Eugenio & Zanetti, Mariachiara, 2020. "Thermophilic vs. mesophilic anaerobic digestion of waste activated sludge: Modelling and energy balance for its applicability at a full scale WWTP," Renewable Energy, Elsevier, vol. 156(C), pages 235-248.

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