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A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

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In situ high throughput method for H(2)S detection during micro-scale wine fermentation.

Gal Winter¹, Chris Curtin

¹School of Biomedical and Health Sciences, College of Health and Science, University of Western Sydney, NSW, Australia.

Journal of Microbiological Methods

|September 18, 2012

Summary

A new method detects hydrogen sulfide (H2S) during fermentation using methylene blue. This simple, real-time approach aids in understanding genetic and environmental factors influencing H2S production in Saccharomyces cerevisiae.

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Area of Science:

Biotechnology
Microbiology
Analytical Chemistry

Background:

Hydrogen sulfide (H2S) production is a critical factor in various fermentation processes, influencing product quality and microbial behavior.
Accurate and real-time monitoring of H2S is essential for optimizing fermentation and understanding microbial metabolism.
Existing methods for H2S detection can be complex or lack the throughput required for large-scale screening.

Purpose of the Study:

To develop a simple, in situ, high-throughput method for real-time detection of hydrogen sulfide (H2S) during fermentation.
To establish a method for generating H2S production profiles and extracting kinetic parameters.
To validate the method for characterizing genetic and environmental factors affecting H2S production in Saccharomyces cerevisiae.

Main Methods:

Development of an in situ method utilizing the redox reaction between sulfide ions and methylene blue.
Incorporation of methylene blue into fermentation media for real-time H2S detection and decolourisation monitoring.
Application of the method to micro-scale fermentations of Saccharomyces cerevisiae.

Main Results:

A straightforward, high-throughput method for real-time H2S detection during fermentation was successfully developed.
The method generates H2S production profiles, enabling extraction of kinetic parameters.
Validation in Saccharomyces cerevisiae demonstrated the method's utility for differentiating genetic and environmental influences on H2S production.

Conclusions:

The developed method offers a simple and efficient way to monitor H2S production in real-time during fermentation.
This technique is suitable for high-throughput screening, facilitating the study of factors affecting H2S metabolism.
The method provides valuable kinetic data for characterizing microbial fermentation, particularly in Saccharomyces cerevisiae.