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Tytuł:
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Coupling hydrothermal carbonization and anaerobic digestion for sewage digestate management: Influence of hydrothermal treatment time on dewaterability and bio-methane production.
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Autorzy:
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Ahmed M; Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123, Trento, Italy; Public Works Department, Faculty of Engineering, Ain Shams University, 1 ElSarayat St., Abassia, Cairo, Egypt.
Andreottola G; Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123, Trento, Italy.
Elagroudy S; Public Works Department, Faculty of Engineering, Ain Shams University, 1 ElSarayat St., Abassia, Cairo, Egypt; Egypt Solid Waste Management Center of Excellence, Ain Shams University, 1 ElSarayat St., Abassia, Cairo, Egypt.
Negm MS; Public Works Department, Faculty of Engineering, Ain Shams University, 1 ElSarayat St., Abassia, Cairo, Egypt.
Fiori L; Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123, Trento, Italy. Electronic address: .
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Źródło:
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Journal of environmental management [J Environ Manage] 2021 Mar 01; Vol. 281, pp. 111910. Date of Electronic Publication: 2021 Jan 02.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: London ; New York, Academic Press.
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MeSH Terms:
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Methane*
Sewage*
Anaerobiosis ; Biofuels ; Carbon
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Contributed Indexing:
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Keywords: Biochemical methane potential; Hydrothermal carbonization; Sewage digestate; Sludge dewaterability; Sludge management
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Substance Nomenclature:
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0 (Biofuels)
0 (Sewage)
7440-44-0 (Carbon)
OP0UW79H66 (Methane)
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Entry Date(s):
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Date Created: 20210105 Date Completed: 20210209 Latest Revision: 20210209
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Update Code:
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20240105
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DOI:
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10.1016/j.jenvman.2020.111910
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PMID:
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33401118
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Hydrothermal carbonization (HTC) technology is addressed in the framework of sewage digestate management. HTC converts digestate into a stabilized and sterilized solid (the hydrochar) and a liquor (HTCL) rich in organic carbon. This study aims to optimize the HTC operating parameters, namely the treatment time, in terms of hydrochar production, HTC slurry dewaterability, HTCL bio-methane yields in anaerobic digestion (AD), and process energy consumption. Digestate slurry was processed through HTC at different treatment times (0.5, 1, 2 and 3 h) at 190 °C, and the dewaterability of the treated slurries was addressed through capillary suction time and centrifuge lab-testing. In addition, biochemical methane potential (BMP) tests were conducted for HTCL under mesophilic conditions. Results show that by increasing the HTC treatment time the dewaterability was further improved, ammonium concentration in HTCL increased, and methane potential of HTCL decreased. 0.5 h HTCL had the highest bio-methane potential of 142 ± 3 mL CH 4 /g COD yet the treatment time was not sufficient for improving the slurry's dewaterability. HTC treatment time of 1 h at 190 °C was identified as the optimum trade-off for improved dewaterability and utilisation of HTCL for biogas production. 1 h HTCL bio-methane potential can cover around 25% of the HTC and AD thermal and electrical energy needs without considering the eventual use of the hydrochar as a biofuel.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
