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Updated: Jul 4, 2026

Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
07:34

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Published on: June 15, 2014

Cascade hydrogen production from butyrate-type straw fermentation effluent using a microbial electrolysis cell.

Huayu Li1, Tiantian Li2, Xiaoyu Li1

  • 1Henan Cigarette Industrial Reconstituted Tobacco Sheet Co., Ltd Xuchang 461000 China.

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|July 3, 2026
PubMed
Summary

This study enhances hydrogen production from corn straw fermentation effluent by enriching microbial electrolysis cell anodes with butyric acid. This method improves butyric acid degradation and effluent purification, offering a scalable solution for biological hydrogen production.

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Area of Science:

  • Biotechnology
  • Renewable Energy
  • Environmental Science

Background:

  • Butyric acid in fermentation effluent poses degradation challenges.
  • Corn straw is a potential substrate for biohydrogen production.
  • Microbial electrolysis cells (MECs) can treat effluent and produce hydrogen.

Purpose of the Study:

  • To optimize hydrogen production from corn straw fermentation effluent using MECs.
  • To investigate the effect of anode enrichment strategies on hydrogen yield and effluent treatment.
  • To analyze the microbial community structure and identify key species for efficient degradation.

Main Methods:

  • Dark fermentation of corn straw for hydrogen production.
  • Enrichment of MEC bioanodes with different substrates (butyric acid, acetic acid, effluent).
  • Investigation of anode enrichment, substrate concentration, and applied voltage effects.
  • High-throughput sequencing for microbial community analysis.

Main Results:

  • Maximum hydrogen yield of 943 mL g-1 and production rate of 3.62 m3 m-3 d-1 achieved with butyric acid-enriched anode at 0.6 V.
  • Butyric acid degradation rate increased by 35.1% and COD removal by 25% compared to effluent enrichment.
  • Anode enrichment with butyric acid led to higher microbial diversity and abundance of *Syntrophomonas* (8.7%).

Conclusions:

  • Butyric acid oxidation is the rate-limiting step in hydrogen production from straw fermentation effluent.
  • A two-stage cascade process enhances straw conversion and hydrogen production efficiency.
  • This method offers simultaneous purification of fermentation effluent, valuable for large-scale biohydrogen production.