Processing of Biomass Prior to Hydrogen Fermentation and Post-Fermentative Broth Management

Area of Science:

• Biotechnology and Bioengineering
• Environmental Science
• Renewable Energy

Background:

• Bioconversion processes for biohydrogen generation necessitate purification of gaseous and liquid streams.
• Current research often uses single biomass types, lacking data on mixed lignocellulose and starch substrates.
• Biomass recalcitrance, particularly lignin, hinders efficient hydrolysis and fermentation.

Purpose of the Study:

• To review factors affecting dark and photo fermentation microorganisms.
• To assess microorganism adaptation to biomass hydrolysates.
• To contribute to bioconversion process knowledge and liquid stream management.

Main Methods:

• Literature review on bioconversion parameters and microorganism responses.
• Analysis of pretreatment effects on biomass hydrolysis and fermentation efficiency.
• Focus on mixed lignocellulose and starch biomass utilization.

Main Results:

• Pretreatment chemical compounds significantly impact biotransformation efficiency.
• Optimization of pretreatment is crucial for downstream bioconversion stages.
• Knowledge gaps exist regarding mixed biomass fermentation and microorganism adaptation.

Conclusions:

• Future research should simplify procedures and adopt circular economy principles.
• Responsible management of liquid and gas streams is essential for energy efficiency.
• Optimized pretreatment is key to advancing biomass bioconversion for biohydrogen production.