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In this study, biochar was added to mixed tannery solid waste (MTSW) at various ratios (0–20% w/w) to enhance process stability and biogas production. The daily biogas yield ranged from 9.67 ± 0.03 to 223.91 ± 0.04 ml/gVS, whereas methane content ranged from 9.5 ± 0.01% to a maximum of 69.27 ± 0.01% at the 15:85 biochar-MTSW ratio, an increase of 59.77%. The inclusion of biochar tended to increase methane production and the overall process efficiency. The chromium content of the slurry was not analysed in the present study. Systematic determination and verification of the concentration of chromium are strongly recommended in further assessments, in relation to the safe agricultural application of slurry and the protection of environmental quality.

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Enhancing Biogas Production from Biochar-Amended Tannery Solid Waste

  • 章节

  • 发表日期：

    2026年

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  • Solomon Kebede Asefa,
  • Venkata Ramayya Ancha,
  • Nigus Gabbiye Habtu,
  • Tarekegn Limore Binchebo

摘要

In this study, biochar was added to mixed tannery solid waste (MTSW) at various ratios (0–20% w/w) to enhance process stability and biogas production. The daily biogas yield ranged from 9.67 ± 0.03 to 223.91 ± 0.04 ml/gVS, whereas methane content ranged from 9.5 ± 0.01% to a maximum of 69.27 ± 0.01% at the 15:85 biochar-MTSW ratio, an increase of 59.77%. The inclusion of biochar tended to increase methane production and the overall process efficiency. The chromium content of the slurry was not analysed in the present study. Systematic determination and verification of the concentration of chromium are strongly recommended in further assessments, in relation to the safe agricultural application of slurry and the protection of environmental quality.