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Impact of waste biomass binders on the pelletizing, combustion, and engineering feasibility of sludge–coal slime co-pelletized fuel.

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Title: Impact of waste biomass binders on the pelletizing, combustion, and engineering feasibility of sludge–coal slime co-pelletized fuel.
Authors: Chen, Hao-Ran1,2 (AUTHOR), Yuan, Yi-Wen1,2 (AUTHOR), Liu, Zhi-Hao1,2 (AUTHOR), Huang, Chang-Ji1,2 (AUTHOR), Ren, Shi-YuS1,2 (AUTHOR), Wang, Hou-Feng1,2 (AUTHOR) wanghf@mail.ustc.edu.cn, Zeng, Raymond Jianxiong1,2 (AUTHOR)
Source: Environmental Research. Sep2026:Part 2, Vol. 305, pN.PAG-N.PAG. 1p.
Subjects: Pelletizing, Combustion, Stability (Mechanics), Cost analysis, Feasibility studies
Abstract: Co-pelletization of municipal sewage sludge (SS) and coal slime (CS) offers a promising route for waste to fuel conversion, but its practical application is often limited by insufficient pellet cohesion and poor mechanical stability. In this study, three bio-derived solid waste binders, namely waste paper (WP), rice straw (RS), and lignin (CL), were incorporated at 10-20 wt% into a 1:1 SS/CS blend to evaluate their effects on pellet quality, combustion behavior, and formulation suitability. The results showed that all three binders improved pellet performance, although through different pathways. CL provided the strongest mechanical reinforcement, and the 20% addition achieved the highest densification and Meyer hardness (approximately 5.9-6.0 MPa), whereas WP showed the greatest improvement in combustion performance. At a 20% addition level, the comprehensive combustion index (S) reached 3.49 × 10−7·%2 min−2 °C−3, which was about 2.99 times that of the control. Kinetic reconstruction based on thermogravimetric analysis indicated that the apparent activation energy varied only slightly among formulations, suggesting that the combustion differences were governed mainly by structural evolution and the associated heat/mass transfer conditions rather than by fundamental changes in reaction barrier. To avoid selecting formulations solely on the basis of combustion metrics, techno-economic assessment (TEA) and ash fusion temperature (AFT) were further incorporated into the screening framework. Although 20% WP showed the highest combustion reactivity, 15% WP provided the best overall balance, with the maximum net profit and low slagging risk, as indicated by softening temperatures above 1330 °C. These results demonstrate that the optimal SS-CS pellet formulation is determined by the combined balance among mechanical stability, combustion reactivity, economic return, and ash-related risk. [Display omitted] • Biomass binders enhance mechanical and combustion properties of SS-CS pellets. • Binder addition improves pellet abrasion resistance and handling stability. • Waste paper maximizes combustion reactivity, increasing the S index by 2.99 times. • Integrated TEA and AFT reveal 15% WP balances net profit and low slagging risk. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Research is the property of Academic Press Inc. 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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DbLabel: Engineering Source
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  Label: Title
  Group: Ti
  Data: Impact of waste biomass binders on the pelletizing, combustion, and engineering feasibility of sludge–coal slime co-pelletized fuel.
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  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Hao-Ran%22">Chen, Hao-Ran</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuan%2C+Yi-Wen%22">Yuan, Yi-Wen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Zhi-Hao%22">Liu, Zhi-Hao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Chang-Ji%22">Huang, Chang-Ji</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ren%2C+Shi-YuS%22">Ren, Shi-YuS</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Hou-Feng%22">Wang, Hou-Feng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> wanghf@mail.ustc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Raymond+Jianxiong%22">Zeng, Raymond Jianxiong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Research%22">Environmental Research</searchLink>. Sep2026:Part 2, Vol. 305, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Pelletizing%22">Pelletizing</searchLink><br /><searchLink fieldCode="DE" term="%22Combustion%22">Combustion</searchLink><br /><searchLink fieldCode="DE" term="%22Stability+%28Mechanics%29%22">Stability (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Cost+analysis%22">Cost analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Feasibility+studies%22">Feasibility studies</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Co-pelletization of municipal sewage sludge (SS) and coal slime (CS) offers a promising route for waste to fuel conversion, but its practical application is often limited by insufficient pellet cohesion and poor mechanical stability. In this study, three bio-derived solid waste binders, namely waste paper (WP), rice straw (RS), and lignin (CL), were incorporated at 10-20 wt% into a 1:1 SS/CS blend to evaluate their effects on pellet quality, combustion behavior, and formulation suitability. The results showed that all three binders improved pellet performance, although through different pathways. CL provided the strongest mechanical reinforcement, and the 20% addition achieved the highest densification and Meyer hardness (approximately 5.9-6.0 MPa), whereas WP showed the greatest improvement in combustion performance. At a 20% addition level, the comprehensive combustion index (S) reached 3.49 × 10−7·%2 min−2 °C−3, which was about 2.99 times that of the control. Kinetic reconstruction based on thermogravimetric analysis indicated that the apparent activation energy varied only slightly among formulations, suggesting that the combustion differences were governed mainly by structural evolution and the associated heat/mass transfer conditions rather than by fundamental changes in reaction barrier. To avoid selecting formulations solely on the basis of combustion metrics, techno-economic assessment (TEA) and ash fusion temperature (AFT) were further incorporated into the screening framework. Although 20% WP showed the highest combustion reactivity, 15% WP provided the best overall balance, with the maximum net profit and low slagging risk, as indicated by softening temperatures above 1330 °C. These results demonstrate that the optimal SS-CS pellet formulation is determined by the combined balance among mechanical stability, combustion reactivity, economic return, and ash-related risk. [Display omitted] • Biomass binders enhance mechanical and combustion properties of SS-CS pellets. • Binder addition improves pellet abrasion resistance and handling stability. • Waste paper maximizes combustion reactivity, increasing the S index by 2.99 times. • Integrated TEA and AFT reveal 15% WP balances net profit and low slagging risk. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Research is the property of Academic Press Inc. 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:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.envres.2026.125070
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Pelletizing
        Type: general
      – SubjectFull: Combustion
        Type: general
      – SubjectFull: Stability (Mechanics)
        Type: general
      – SubjectFull: Cost analysis
        Type: general
      – SubjectFull: Feasibility studies
        Type: general
    Titles:
      – TitleFull: Impact of waste biomass binders on the pelletizing, combustion, and engineering feasibility of sludge–coal slime co-pelletized fuel.
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            NameFull: Chen, Hao-Ran
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            NameFull: Yuan, Yi-Wen
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          Dates:
            – D: 15
              M: 09
              Text: Sep2026:Part 2
              Type: published
              Y: 2026
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              Value: 305
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