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Environmental Science and Pollution Research

, Volume 24, Issue 7, pp 6770–6778 | Cite as

Source analysis of organic matter in swine wastewater after anaerobic digestion with EEM-PARAFAC

  • Zhuo Zeng
  • Ping ZhengEmail author
  • Aqiang Ding
  • Meng Zhang
  • Ghulam Abbas
  • Wei Li
Research Article

Abstract

Swine wastewater is one of the most serious pollution sources, and it has attracted a great public concern in China. Anaerobic digestion technology is extensively used in swine wastewater treatment. However, the anaerobic digestion effluents are difficult to meet the discharge standard. The results from batch experiments showed that plenty of refractory organic matter remained in the effluents after mesophilic anaerobic digestion for 30 days. The effluent total COD (tCOD) and soluble COD (sCOD) were 483 and 324 mg/L, respectively, with the sCOD/tCOD ratio of 0.671. Fluorescence excitation–emission matrix (EEM) coupled with parallel factor analysis (PARAFAC) revealed that the dissolved organic matter in the effluents was tryptophan-like substance, humic acid substance, and fulvic acid substance. Based on the appearance time during anaerobic digestion, tryptophan-like substance and humic acid substance were inferred to originate from the raw swine wastewater, and the fulvic acid substance was inferred to be formed in the anaerobic digestion. This work has revealed the source of residual organic matter in anaerobic digestion of swine wastewater and has provided some valuable information for the post-treatment.

Keywords

Swine wastewater Anaerobic digestion Refractory organic matter Source analysis 

Notes

Acknowledgements

This work was financially supported by the Zhejiang Key Science and Technology Innovation Team Project Grant (No. 2013TD03).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Zhuo Zeng
    • 1
  • Ping Zheng
    • 1
    Email author
  • Aqiang Ding
    • 1
  • Meng Zhang
    • 1
  • Ghulam Abbas
    • 1
  • Wei Li
    • 1
  1. 1.Department of Environmental EngineeringZhejiang UniversityHangzhouPeople’s Republic of China

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