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In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
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Related Experiment Video

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Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry
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Biochar from Biosolids Pyrolysis: A Review.

Jorge Paz-Ferreiro1, Aurora Nieto2, Ana Méndez3

  • 1School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Australia. jorge.paz-ferreiro@rmit.edu.au.

International Journal of Environmental Research and Public Health
|May 12, 2018
PubMed
Summary

Growing volumes of biosolids require sustainable management. This review critically examines pyrolysis and its solid product, biochar, as environmentally sound options for treated sewage sludge, moving away from landfilling.

Keywords:
biocharbiosolidssoil amelioration

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Area of Science:

  • Environmental Science
  • Waste Management
  • Soil Science

Background:

  • Municipal wastewater facilities are producing increasing volumes of biosolids due to urban expansion and facility upgrades.
  • Biosolids possess valuable nutrients and energy, suitable for agricultural or waste-to-energy applications.
  • Regulatory pressure is mounting to phase out the landfilling of biosolids.

Purpose of the Study:

  • To critically review management options for biosolids.
  • To focus on pyrolysis as a biosolids treatment method.
  • To evaluate the application of biochar (the solid fraction of pyrolysis) in soil.

Main Methods:

  • Critical literature review of biosolids management strategies.
  • Analysis of pyrolysis as a thermal treatment process for biosolids.
  • Review of research on the use of biochar in agricultural soils.

Main Results:

  • Pyrolysis offers a viable alternative to landfilling for biosolids management.
  • Biochar derived from biosolids can potentially be applied to soil, offering nutrient and soil amendment benefits.
  • Further research is needed to optimize biochar application and assess long-term soil impacts.

Conclusions:

  • Pyrolysis presents a promising pathway for sustainable biosolids management.
  • The utilization of biochar in soil represents a circular economy approach for treated sewage sludge.
  • Transitioning from landfilling to advanced treatment like pyrolysis is essential for environmental sustainability.