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Continuous hydrogen production from organic waste.

T Noike1, I B Ko, S Yokoyama

  • 1Advanced Research Institute for Science and Humanities, Nihon University, Tokyo 102-8275, Japan.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|September 27, 2005
PubMed
Summary

Lactic acid bacteria, Lactobacillus paracasei, enhance hydrogen production from waste. Maintaining pH above 5.0 prevents inhibition, enabling continuous fermentation from organic waste.

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Area of Science:

  • Microbiology
  • Biotechnology
  • Environmental Science

Background:

  • Lactic acid bacteria (LAB) exhibit antibiotic properties.
  • Hydrogen production is a key area of bioenergy research.
  • Organic waste valorization is crucial for sustainability.

Purpose of the Study:

  • To investigate the antibiotic effects of Lactobacillus paracasei on hydrogen production.
  • To optimize conditions for continuous hydrogen fermentation using organic waste.

Main Methods:

  • Batch experiments using glucose as a substrate to study LAB effects on hydrogen production.
  • Continuous fermentation experiments using bean curd manufacturing waste.
  • Analysis of metabolic pathways and pH control.

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Main Results:

  • Hydrogen production inhibition by LAB was prevented at pH > 5.0.
  • Continuous hydrogen production was achieved using bean curd waste at pH 5.5 and 35°C.
  • Increased substrate concentration and nitrogen addition favored acetic and butyric acid production, suppressing propionic acid.

Conclusions:

  • Lactobacillus paracasei can be utilized to enhance hydrogen production from organic waste.
  • pH control is critical for preventing LAB inhibition of hydrogen-producing bacteria.
  • Optimized fermentation conditions enable efficient hydrogen generation from municipal organic waste.