Fermentation

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</p><p>In fermentation-based systems, microorganisms, such as bacteria, break down organic matter to produce hydrogen.&nbsp;</p><p>The organic matter can be refined sugars, raw biomass sources such as corn stover, and even wastewater. Because no light is required, these methods are sometimes called "dark fermentation" methods.
</p><p>Microbial biomass conversion processes take advantage of the ability of microorganisms to consume and digest biomass and release hydrogen.&nbsp;</p><p>Depending on the pathway, this research could result in commercial-scale systems in the mid- to long-term timeframe that could be suitable for distributed, semi-central, or central hydrogen production scales, depending on the feedstock used.</p>