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Odor composition analysis and odor indicator selection during sewage sludge composting.

Yan-Li Zhu1, Guo-di Zheng1, Ding Gao1

  • 1a Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing , People's Republic of China.

Journal of the Air & Waste Management Association (1995)
|May 19, 2016
PubMed
Summary
This summary is machine-generated.

Sewage sludge composting produces odors, primarily from sulfur volatile organic compounds. Dimethyl disulfide is identified as a key indicator for monitoring and managing this odor pollution.

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Waste Management

Background:

  • Composting is crucial for sewage sludge treatment and soil amendment.
  • Odor generation is an unavoidable challenge in sewage sludge composting.
  • Understanding odor emission patterns is vital for effective control strategies.

Purpose of the Study:

  • To analyze the odor composition of sewage sludge compost.
  • To identify key indicators for odor pollution assessment.
  • To establish a scientific basis for odor management in composting facilities.

Main Methods:

  • Gas chromatography-mass spectrometry (GC-MS) with liquid nitrogen cooling.
  • Portable odor detection.
  • Analysis of surface and internal compost piles.
  • Identification of volatile organic compounds (VOCs) and inorganic compounds.

Main Results:

  • Approximately 80 substances detected, including sulfur organic compounds, benzenes, alkanes, alkenes, and halogenated compounds.
  • Sulfur volatile organic compounds significantly contribute to odor.
  • Dimethyl disulfide identified as a primary odor pollution indicator.
  • Established core, concentration, and health indicators for odor evaluation.

Conclusions:

  • Sulfur volatile organic compounds require primary control in sewage sludge composting.
  • Dimethyl disulfide serves as a reliable indicator for modeling and evaluating odor pollution.
  • Monitoring dimethyl disulfide offers a scientific approach to managing composting odors.