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Applied Microbiology and Biotechnology

, Volume 99, Issue 17, pp 7321–7331 | Cite as

Effects of aeration strategy on the evolution of dissolved organic matter (DOM) and microbial community structure during sludge bio-drying

  • Junya Zhang
  • Xing Cai
  • Lu Qi
  • Chunyan Shao
  • Yang Lin
  • Jin Zhang
  • Yuanli Zhang
  • Peihong Shen
  • Yuansong WeiEmail author
Environmental biotechnology

Abstract

Sludge bio-drying in which sludge is dried by means of the heat generated by the aerobic degradation of its own organic substances has been widely used for sludge treatment. A better understanding of the evolution of dissolved organic matter (DOM) and its degradation drivers during sludge bio-drying could facilitate its control. Aeration is one of the key factors that affect sludge bio-drying performance. In this study, two aeration strategies (pile I—the optimized and pile II—the current) were established to investigate their impacts on the evolution of DOM and the microbial community in a full-scale sludge bio-drying plant. A higher pile temperature in pile I caused pile I to enter the DOM and microbiology stable stage approximately2 days earlier than pile II. The degradation of easily degradable components in the DOM primarily occurred in the thermophilic phase; after that degradation, the DOM components changed a little. Along with the evolution of the DOM, its main degradation driver, the microbial community, changed considerably. Phyla Firmicutes and Proteobacteria were dominant in the thermophilic stage, and genus Ureibacillus, which was the primary thermophilic bacteria, was closely associated with the degradation of the DOM. In the mesophilic stage, the microbial community changed significantly at first and subsequently stabilized, and the genus Parapedobacter, which belongs to Bacteriodetes, became dominant. This study elucidates the interplay between the DOM and microbial community during sludge bio-drying.

Keywords

Microbial community Sludge bio-drying Dissolved organic matter 

Notes

Acknowledgments

This work is supported by the National Water Pollution Control and Management Technology Major Project of China (2012ZX07202-005) and the National Natural Science Foundation of China (21377151).

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

253_2015_6640_MOESM1_ESM.pdf (607 kb)
ESM 1 (PDF 606 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Junya Zhang
    • 1
  • Xing Cai
    • 2
  • Lu Qi
    • 3
  • Chunyan Shao
    • 2
  • Yang Lin
    • 4
  • Jin Zhang
    • 4
  • Yuanli Zhang
    • 4
  • Peihong Shen
    • 5
  • Yuansong Wei
    • 1
    Email author
  1. 1.Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina
  2. 2.Shenyang Research Academy of Environmental SciencesShenyangChina
  3. 3.School of Safety and Environmental EngineeringCapital University of Economics and BusinessBeijingChina
  4. 4.Shenyang Zhenxing Sludge Disposal Co., LTDShenyangChina
  5. 5.College of Life Science and Technology of Guangxi UniversityNanningChina

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