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Study on the Co-Combustion Behavior of Municipal Sludge and Bagasse: Evaluation of Ultrasonic Pretreatment

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  • Shiwen Fang

    (College of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

  • Lifa Zhang

    (College of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

  • Shu Chen

    (College of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

  • Ziyuan Xie

    (College of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

  • Lanke Wang

    (College of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

  • Luyou Chen

    (Shenzhen Zenergy Co., Ltd., Shenzhen 518000, China)

  • Wei Liang

    (College of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)

  • Pengfei Lei

    (Guangdong Fennick Energy Saving Equipment Co., Ltd., Guangzhou 511400, China)

Abstract

Currently, the production of sludge in China is on the rise annually, and the co-combustion of sludge with biomass for power and heat generation represents a viable method for the bulk treatment of sludge. In this study, we examined the combustion characteristics of municipal sludge (MS), bagasse (BA), and their blends using thermogravimetric analysis. Orthogonal experiments were conducted to assess the impact of ultrasonic pretreatment on the co-combustion properties of MS and BA. Prior to ultrasonic pretreatment, the combustion of BA was characterized by three distinct stages, while MS exhibited two stages. At a 30% MS ratio, the promotional interaction between BA and MS was most pronounced. Following ultrasonic pretreatment, the combustion of BA was simplified to two stages. With a 10% MS mass ratio, ultrasonic pretreatment enhanced the comprehensive combustion characteristic index, thereby improving the combustion performance of the mixture. The activation energy increased post-pretreatment, particularly when the MS content was 50%. Under the conditions of 45 kHz frequency, 500 W power, 3 h duration, and a 10% MS blending ratio, the mixture displayed reduced mass residue, elevated reaction rates, and superior combustion efficiency. This research aims to introduce a novel approach to the harmless disposal, volume reduction, and resourceful utilization of sludge.

Suggested Citation

  • Shiwen Fang & Lifa Zhang & Shu Chen & Ziyuan Xie & Lanke Wang & Luyou Chen & Wei Liang & Pengfei Lei, 2024. "Study on the Co-Combustion Behavior of Municipal Sludge and Bagasse: Evaluation of Ultrasonic Pretreatment," Energies, MDPI, vol. 17(23), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:23:p:5882-:d:1527706
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    References listed on IDEAS

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    1. Fang, Shiwen & Lin, Yousheng & Lin, Yan & Chen, Shu & Shen, Xiangyang & Zhong, Tianming & Ding, Lixing & Ma, Xiaoqian, 2020. "Influence of ultrasonic pretreatment on the co-pyrolysis characteristics and kinetic parameters of municipal solid waste and paper mill sludge," Energy, Elsevier, vol. 190(C).
    2. Xu, Tong & Wang, Chunbo & Hong, Dikun & Li, Song & Yue, Shuang, 2023. "The synergistic effect during co-combustion of municipal sludge and coal: Experimental and ReaxFF molecular dynamic study," Energy, Elsevier, vol. 262(PB).
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