BIOGAS PRODUCTION: BIODEGRADABILITY OF EXHAUSTED FERMENTATION BROTHS
Within the project Biovino, the University of León is testing an exhausted fermentation broth as a substrate for anaerobic digestion, in order to assess its degradation ability and its biogas production. In this experiment, the exhausted broth comes from the ABE fermentation of vine shoot hydrolysate. Exhausted fermentation broths are the residue which remains after product recovery (acetone, butanol and ethanol) from the fermentation broth once that the process is finished.
Biodegradability assays are a quick method to know the ability of residues to produce a renewable resource as biogas. At the same time, it is possible to determine the biodegradability of the residue, whose organic load will be lower after the anaerobic digestion, which enables its use as an organic amendment.
Biogas is a mixture composed mainly of methane (CH4) and carbon dioxide (CO2) and which can be used as a fuel in boilers, motors, etc. In addition, the residue employed for biogas production will have a lower organic load after the process.
Some factors influencing biodegradation are:
The reactor with the lowest inoculum load has a delay in its methanogenic phase in comparison to the reactor with the highest inoculum load. Even though, good biogas productions are obtained in terms of methane, reaching 217-583 L CH4/kg VS. These results show that, in both cases, vine shoot exhausted broths are a viable substrate for anaerobic digestion.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.