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Evaluation on energetic and economic benefits of the coupling anaerobic digestion and gasification from agricultural wastes.

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Title: Evaluation on energetic and economic benefits of the coupling anaerobic digestion and gasification from agricultural wastes.
Authors: Guo, Xiang1 (AUTHOR), Zhang, Yanbin1 (AUTHOR), Guo, Qianqian1 (AUTHOR), Zhang, Rui1 (AUTHOR), Wang, Caiyu1 (AUTHOR), Yan, Beibei1,2 (AUTHOR) yanbeibei@tju.edu.cn, Lin, Fawei1 (AUTHOR), Chen, Guanyi1,3,4,5 (AUTHOR), Hou, Li'an1 (AUTHOR)
Source: Renewable Energy: An International Journal. Oct2021, Vol. 176, p494-503. 10p.
Subject Terms: *Agricultural wastes, *Anaerobic digestion, Cold gases
Abstract: The sustainability of the anaerobic digestion (AD) plant was closely related to the disposal of digestate and enhancement of energy recovery. Aiming to promote this, coupling AD and digestate gasification (AD-gasification) was proposed and evaluated for a large-scale AD plant. Firstly, characterization of the solid digestate was measured. Secondly, air gasification of the solid digestate was performed. Finally, two scenarios aiming at enhancing energy recovery as electricity or gas were investigated. Superior C content (50.14 wt%), H/C (1.57) and O/C (0.62) molar ratios and lower heating value (LHV) of solid digestate (18.01 MJ/kg) made it propitious to gasification. Air gasification of digestate at 800 °C with ER = 0.26 resulted in the optimal LHV of producer gas (6.35 MJ/Nm3) and cold gas efficiency (CGE, 66.99%). In the biomass-to-electricity scenario, the excess of heat from the CHP system in the AD plant was sufficient to dry the solid digestate. Compared with the stand-alone AD plant, the total electricity from the coupling system increased about 11%. In the biomass-to-gas scenario, the gas income increased by 14% when the initial solid digestate was naturally air-dried to a water content of 50%. This research would provide technical guidance for the sustainability of the AD industry. [ABSTRACT FROM AUTHOR]
Copyright of Renewable Energy: An International Journal is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 150792694
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Evaluation on energetic and economic benefits of the coupling anaerobic digestion and gasification from agricultural wastes.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Guo%2C+Xiang%22">Guo, Xiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yanbin%22">Zhang, Yanbin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Qianqian%22">Guo, Qianqian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Rui%22">Zhang, Rui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Caiyu%22">Wang, Caiyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Beibei%22">Yan, Beibei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yanbeibei@tju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lin%2C+Fawei%22">Lin, Fawei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Guanyi%22">Chen, Guanyi</searchLink><relatesTo>1,3,4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Li'an%22">Hou, Li'an</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Renewable+Energy%3A+An+International+Journal%22">Renewable Energy: An International Journal</searchLink>. Oct2021, Vol. 176, p494-503. 10p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Agricultural+wastes%22">Agricultural wastes</searchLink><br />*<searchLink fieldCode="DE" term="%22Anaerobic+digestion%22">Anaerobic digestion</searchLink><br /><searchLink fieldCode="DE" term="%22Cold+gases%22">Cold gases</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The sustainability of the anaerobic digestion (AD) plant was closely related to the disposal of digestate and enhancement of energy recovery. Aiming to promote this, coupling AD and digestate gasification (AD-gasification) was proposed and evaluated for a large-scale AD plant. Firstly, characterization of the solid digestate was measured. Secondly, air gasification of the solid digestate was performed. Finally, two scenarios aiming at enhancing energy recovery as electricity or gas were investigated. Superior C content (50.14 wt%), H/C (1.57) and O/C (0.62) molar ratios and lower heating value (LHV) of solid digestate (18.01 MJ/kg) made it propitious to gasification. Air gasification of digestate at 800 °C with ER = 0.26 resulted in the optimal LHV of producer gas (6.35 MJ/Nm3) and cold gas efficiency (CGE, 66.99%). In the biomass-to-electricity scenario, the excess of heat from the CHP system in the AD plant was sufficient to dry the solid digestate. Compared with the stand-alone AD plant, the total electricity from the coupling system increased about 11%. In the biomass-to-gas scenario, the gas income increased by 14% when the initial solid digestate was naturally air-dried to a water content of 50%. This research would provide technical guidance for the sustainability of the AD industry. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Renewable Energy: An International Journal is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.renene.2021.05.097
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 494
    Subjects:
      – SubjectFull: Agricultural wastes
        Type: general
      – SubjectFull: Anaerobic digestion
        Type: general
      – SubjectFull: Cold gases
        Type: general
    Titles:
      – TitleFull: Evaluation on energetic and economic benefits of the coupling anaerobic digestion and gasification from agricultural wastes.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Guo, Xiang
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            NameFull: Zhang, Yanbin
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            NameFull: Guo, Qianqian
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            NameFull: Zhang, Rui
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            NameFull: Wang, Caiyu
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            NameFull: Yan, Beibei
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            NameFull: Lin, Fawei
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            NameFull: Chen, Guanyi
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            NameFull: Hou, Li'an
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          Dates:
            – D: 01
              M: 10
              Text: Oct2021
              Type: published
              Y: 2021
          Identifiers:
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              Value: 09601481
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            – Type: volume
              Value: 176
          Titles:
            – TitleFull: Renewable Energy: An International Journal
              Type: main
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