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Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars
Hydrothermal treatment (HTT) can efficiently valorize the digestate after anaerobic digestion. However, the disposal of the HTT liquid is challenging. This paper proposes a method to recover energy through the anaerobic co-digestion of food waste and HTT liquid fraction. The effect of HTT liquid rec...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9937904/ https://www.ncbi.nlm.nih.gov/pubmed/36820150 http://dx.doi.org/10.1016/j.ese.2023.100239 |
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author | Shao, Mingshuai Zhang, Chao Wang, Xue Wang, Ning Chen, Qindong Cui, Guangyu Xu, Qiyong |
author_facet | Shao, Mingshuai Zhang, Chao Wang, Xue Wang, Ning Chen, Qindong Cui, Guangyu Xu, Qiyong |
author_sort | Shao, Mingshuai |
collection | PubMed |
description | Hydrothermal treatment (HTT) can efficiently valorize the digestate after anaerobic digestion. However, the disposal of the HTT liquid is challenging. This paper proposes a method to recover energy through the anaerobic co-digestion of food waste and HTT liquid fraction. The effect of HTT liquid recirculation on anaerobic co-digestion performance was investigated. This study focused on the self-generated hydrochars that remained in the HTT supernatant after centrifugation. The effect of the self-generated hydrochars on the methane (CH(4)) yield and microbial communities were discussed. After adding HTT liquids treated at 140 and 180 °C, the maximum CH(4) production increased to 309.36 and 331.61 mL per g COD, respectively. The HTT liquid exhibited a pH buffering effect and kept a favorable pH for the anaerobic co-digestion. In addition, the self-generated hydrochars with higher carbon content and large oxygen-containing functional groups remained in HTT liquid. They increased the electron transferring rate of the anaerobic co-digestion. The increased relative abundance of Methanosarcina, Syntrophomonadaceae, and Synergistota was observed with adding HTT liquid. The results of the principal component analysis indicate that the electron transferring rate constant had positive correlationships with the relative abundance of Methanosarcina, Syntrophomonadaceae, and Synergistota. This study can provide a good reference for the disposal of the HTT liquid and a novel insight regarding the mechanism for the anaerobic co-digestion. |
format | Online Article Text |
id | pubmed-9937904 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-99379042023-02-19 Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars Shao, Mingshuai Zhang, Chao Wang, Xue Wang, Ning Chen, Qindong Cui, Guangyu Xu, Qiyong Environ Sci Ecotechnol Original Research Hydrothermal treatment (HTT) can efficiently valorize the digestate after anaerobic digestion. However, the disposal of the HTT liquid is challenging. This paper proposes a method to recover energy through the anaerobic co-digestion of food waste and HTT liquid fraction. The effect of HTT liquid recirculation on anaerobic co-digestion performance was investigated. This study focused on the self-generated hydrochars that remained in the HTT supernatant after centrifugation. The effect of the self-generated hydrochars on the methane (CH(4)) yield and microbial communities were discussed. After adding HTT liquids treated at 140 and 180 °C, the maximum CH(4) production increased to 309.36 and 331.61 mL per g COD, respectively. The HTT liquid exhibited a pH buffering effect and kept a favorable pH for the anaerobic co-digestion. In addition, the self-generated hydrochars with higher carbon content and large oxygen-containing functional groups remained in HTT liquid. They increased the electron transferring rate of the anaerobic co-digestion. The increased relative abundance of Methanosarcina, Syntrophomonadaceae, and Synergistota was observed with adding HTT liquid. The results of the principal component analysis indicate that the electron transferring rate constant had positive correlationships with the relative abundance of Methanosarcina, Syntrophomonadaceae, and Synergistota. This study can provide a good reference for the disposal of the HTT liquid and a novel insight regarding the mechanism for the anaerobic co-digestion. Elsevier 2023-01-09 /pmc/articles/PMC9937904/ /pubmed/36820150 http://dx.doi.org/10.1016/j.ese.2023.100239 Text en © 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Original Research Shao, Mingshuai Zhang, Chao Wang, Xue Wang, Ning Chen, Qindong Cui, Guangyu Xu, Qiyong Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars |
title | Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars |
title_full | Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars |
title_fullStr | Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars |
title_full_unstemmed | Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars |
title_short | Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars |
title_sort | co-digestion of food waste and hydrothermal liquid digestate: promotion effect of self-generated hydrochars |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9937904/ https://www.ncbi.nlm.nih.gov/pubmed/36820150 http://dx.doi.org/10.1016/j.ese.2023.100239 |
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