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Bacterial Community Structure and Predicted Metabolic Function of Landfilled Municipal Solid Waste in China

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  • Han Ke

    (MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310000, China)

  • Jinghang Li

    (MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310000, China)

  • Xuanqi Zhang

    (MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310000, China)

  • Jie Hu

    (MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310000, China)

Abstract

The biodegradation behavior of municipal solid waste (MSW) depends on the diversity and metabolic function of bacterial communities, which are affected by environmental factors. However, the diversity of the bacterial communities and metabolic functions in MSW, as well as their influencing factors, remain unclear. In deep-aged MSW, the abovementioned deficiencies are more significant, and will effectively hamper landfill disposal. In this study, high-throughput sequencing was performed to examine the bacterial community structure and metabolic function from depths of 10 m to 40 m, of two large MSW landfills on the southeast coast of China. Thermotogota (1.6–32.0%), Firmicutes (44.2–77.1%), and Bacteroidota (4.0–34.3%) were the three dominant phyla among the 39 bacterial phyla identified in aged MSW samples. Bacterial genera associated with the degradation of many macromolecules, e.g., Defluviitoga , Hydrogenispora , and Lentimicrobium were abundantly detected in MSW samples, even in aged MSW. Redundancy analysis (RDA) showed that bacterial diversity in the landfills was most strongly correlated with electrical conductivity, age, and moisture content of the MSW. Tax4fun2 analysis predicted that there were abundant metabolism functions in aged MSW, especially functional enzymes (e.g., glycine dehydrogenase and cellulase) related to amino acids and cellulose degradation. This study increases our understanding of the bacterial diversity and functional characteristics in landfilled MSW.

Suggested Citation

  • Han Ke & Jinghang Li & Xuanqi Zhang & Jie Hu, 2022. "Bacterial Community Structure and Predicted Metabolic Function of Landfilled Municipal Solid Waste in China," Sustainability, MDPI, vol. 14(6), pages 1-18, March.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:6:p:3144-:d:766205
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    References listed on IDEAS

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    1. Haijie He & Tao Wu & Xiaogang Wang & Zhanhong Qiu & Jiwu Lan, 2021. "Study on Compressibility and Settlement of a Landfill with Aged Municipal Solid Waste: A Case Study in Taizhou," Sustainability, MDPI, vol. 13(9), pages 1-13, April.
    2. Sai Ge & Jun Ma & Lei Liu & Zhiming Yuan, 2020. "The Impact of Exogenous Aerobic Bacteria on Sustainable Methane Production Associated with Municipal Solid Waste Biodegradation: Revealed by High-Throughput Sequencing," Sustainability, MDPI, vol. 12(5), pages 1-11, February.
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    Cited by:

    1. Dandan Song & Yuanquan Cui & Dalong Ma & Xin Li & Lin Liu, 2022. "Spatial Variation of Microbial Community Structure and Its Driving Environmental Factors in Two Forest Types in Permafrost Region of Greater Xing′an Mountains," Sustainability, MDPI, vol. 14(15), pages 1-15, July.

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