Glucose fermentation with biochar amended consortium: Sequential fermentations

Area of Science:

• Microbiology
• Biotechnology
• Environmental Science

Background:

• Microbial consortia are crucial for fermentation processes.
• Carbon materials can influence microbial activity and electron transfer.
• Understanding fermentation enhancement is key for biofuel and biochemical production.

Purpose of the Study:

• To investigate the impact of biochar and activated carbon on sequential batch glucose fermentation using a biological consortium.
• To compare the efficacy of different biochars and activated carbon as amendments.
• To analyze the effects on volatile fatty acid production and gas consumption.

Main Methods:

• Sequential batch fermentation of glucose with a microbial consortium.
• Amendment of fermentation broth with nine different biochars and one activated carbon.
• Analysis of volatile fatty acid distributions and gas (H2 and CO2) consumption.
• Assessment of biofilm formation and its role in fermentation.

Main Results:

• Carbon amendment, particularly activated carbon, enhanced glucose fermentation.
• Activated carbon was more effective than biochars as a cell carrier and electron conductor.
• Volatile fatty acid distributions were altered due to shifts in H2 and CO2 consumption.
• Biochar type did not significantly affect glucose glycolysis or subsequent gas consumption reactions.

Conclusions:

• Activated carbon and biochar amendments can improve microbial glucose fermentation.
• Activated carbon shows superior performance over biochar in enhancing fermentation efficiency.
• Biofilm formation plays a role in the fermentation mechanisms and volatile fatty acid yields.