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Study on the mechanism of action of methane production by co-fermentation of sludge and lignite.

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Title: Study on the mechanism of action of methane production by co-fermentation of sludge and lignite.
Authors: Guo, Hongyu1,2 (AUTHOR), Zhang, Yawei1 (AUTHOR), Xia, Daping2,3 (AUTHOR) xiadp22@hpu.edu.cn, Liu, Yucheng1 (AUTHOR), Chen, Zhenhong4 (AUTHOR), Li, Bing1 (AUTHOR)
Source: Bioprocess & Biosystems Engineering. Apr2024, Vol. 47 Issue 4, p483-493. 11p.
Subjects: Lignite, Total suspended solids, Biochemical oxygen demand, Chemical oxygen demand, Suspended solids, Environmental protection, Renewable natural gas
Abstract: To improve the methanogenic efficiency of lignite anaerobic fermentation and explore innovative approaches to sludge utilization, a co-fermentation technique involving lignite and sludge was employed for converting biomass into biomethane. Volatile suspended solids were introduced as a native enrichment of the sludge and mixed with lignite for fermentation. The synergistic fermentation mechanism between sludge and lignite for biomethane production was analyzed through biochemical methane potential experiments, measurement of various parameters pre- and post-fermentation, observation of bacterial population changes during the peak of reaction, carbon migration assessment, and evaluation of rheological characteristics. The results showed that the addition of sludge in the anaerobic fermentation process improved the microorganisms' ability to degrade lignite and bolstered biomethane production. Notably, the maximum methane production recorded was 215.52 mL/g-volatile suspended solids, achieved at a sludge to coal ratio of 3:1, with a synergistic growth rate of 25.37%. Furthermore, the removal rates of total suspended solids, and total chemical oxygen demand exhibited an upward trend with an increasing percentage of sludge in the mixture. The relative abundance and activity of the methanogens population were found to increase with an appropriate ratio of sludge to lignite. This observation confirmed the migration of carbon between the solid–liquid–gas phases, promoting enhanced system affinity. Additionally, the changes in solid–liquid phase parameters before and after the reaction indicated that the addition of sludge improved the system's degradation capacity. The results of the study hold significant implications in realizing the resource utilization of sludge and lignite while contributing to environmental protection endeavors. [ABSTRACT FROM AUTHOR]
Copyright of Bioprocess & Biosystems Engineering is the property of Springer Nature 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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  Data: Study on the mechanism of action of methane production by co-fermentation of sludge and lignite.
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  Data: <searchLink fieldCode="AR" term="%22Guo%2C+Hongyu%22">Guo, Hongyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yawei%22">Zhang, Yawei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xia%2C+Daping%22">Xia, Daping</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> xiadp22@hpu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Yucheng%22">Liu, Yucheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Zhenhong%22">Chen, Zhenhong</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Bing%22">Li, Bing</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Bioprocess+%26+Biosystems+Engineering%22">Bioprocess & Biosystems Engineering</searchLink>. Apr2024, Vol. 47 Issue 4, p483-493. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Lignite%22">Lignite</searchLink><br /><searchLink fieldCode="DE" term="%22Total+suspended+solids%22">Total suspended solids</searchLink><br /><searchLink fieldCode="DE" term="%22Biochemical+oxygen+demand%22">Biochemical oxygen demand</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+oxygen+demand%22">Chemical oxygen demand</searchLink><br /><searchLink fieldCode="DE" term="%22Suspended+solids%22">Suspended solids</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+protection%22">Environmental protection</searchLink><br /><searchLink fieldCode="DE" term="%22Renewable+natural+gas%22">Renewable natural gas</searchLink>
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  Label: Abstract
  Group: Ab
  Data: To improve the methanogenic efficiency of lignite anaerobic fermentation and explore innovative approaches to sludge utilization, a co-fermentation technique involving lignite and sludge was employed for converting biomass into biomethane. Volatile suspended solids were introduced as a native enrichment of the sludge and mixed with lignite for fermentation. The synergistic fermentation mechanism between sludge and lignite for biomethane production was analyzed through biochemical methane potential experiments, measurement of various parameters pre- and post-fermentation, observation of bacterial population changes during the peak of reaction, carbon migration assessment, and evaluation of rheological characteristics. The results showed that the addition of sludge in the anaerobic fermentation process improved the microorganisms' ability to degrade lignite and bolstered biomethane production. Notably, the maximum methane production recorded was 215.52 mL/g-volatile suspended solids, achieved at a sludge to coal ratio of 3:1, with a synergistic growth rate of 25.37%. Furthermore, the removal rates of total suspended solids, and total chemical oxygen demand exhibited an upward trend with an increasing percentage of sludge in the mixture. The relative abundance and activity of the methanogens population were found to increase with an appropriate ratio of sludge to lignite. This observation confirmed the migration of carbon between the solid–liquid–gas phases, promoting enhanced system affinity. Additionally, the changes in solid–liquid phase parameters before and after the reaction indicated that the addition of sludge improved the system's degradation capacity. The results of the study hold significant implications in realizing the resource utilization of sludge and lignite while contributing to environmental protection endeavors. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Bioprocess & Biosystems Engineering is the property of Springer Nature 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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        Value: 10.1007/s00449-024-02979-5
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        Text: English
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        Type: general
      – SubjectFull: Total suspended solids
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      – SubjectFull: Biochemical oxygen demand
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      – SubjectFull: Environmental protection
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      – SubjectFull: Renewable natural gas
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      – TitleFull: Study on the mechanism of action of methane production by co-fermentation of sludge and lignite.
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            NameFull: Guo, Hongyu
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              M: 04
              Text: Apr2024
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              Y: 2024
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