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November 11, 2025Bioresource TechnologyOpen Access

Performance and inhibitory characteristics of solubilized digestate returned to anaerobic digestion

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Authors

ELEun-Young LeeKMKyung Jin MinKPki young Park

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Overview

Analysis reveals thermal hydrolysis enhances methane production from digestate, indicating improved digestate recirculation is possible.

Key Points

  • Methane production was highest with thermal hydrolysis, yielding 270-288 mL CH4/g VS compared to 145-166 mL CH4/g VS from ultrasonication.
  • Thermal hydrolysis achieved a maximum soluble COD of 9,205 mg/L with lower energy input compared to ultrasonication.
  • Biochemical methane potential tests and liquid chromatography identified better bioavailability with thermal hydrolysis's low-molecular-weight compounds.
  • These findings suggest optimizing anaerobic digestion systems can enhance methane yields and reduce solid accumulation.

Cite This Study

Lee et al. (2025) studied this question.

synapsesocial.com/papers/69252ea8c0ce034ddc356aaehttps://doi.org/10.1016/j.biortech.2025.133634
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