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September 10, 2025Environmental Technology

Effect of biochar derived at different pyrolysis temperatures on heavy metal speciation during sewage sludge anaerobic digestion process

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Authors

WZWen ZhangCQChunsheng QiuRLRuoxin Li

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Overview

Observational analysis reveals that biochar improves methane production in anaerobic digestion, indicating reduced environmental risks of heavy metals.

Key Points

  • Biochar addition led to a 14.31-151.32% increase in cumulative methane production, enhancing anaerobic digestion efficiency.
  • Chemical speciation of heavy metals transformed from unstable to stable forms during the digestion process, indicating improved safety.
  • Heavy metal pollution indexes increased but remained below 1, highlighting a low risk level for environmental harm.
  • Biochar produced at 600 ℃ showed the best support for methane production and significant reduction in ecological risks.

Cite This Study

Zhang et al. (2025) studied this question.

synapsesocial.com/papers/68c19f9c54b1d3bfb60db2a5https://doi.org/10.1080/09593330.2025.2526184
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Also Consider

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  4. 4Effects of Pyrolysis Temperature on Biochar Physicochemical and Microbial Properties for H2S Removal from Biogas2024 · 11 citations
  5. 5From Waste to Process Enhancer: Pyrolysis-Engineered Biochar as a Booster in Anaerobic Digestion2026