Elucidating metabolic tuning of mixed purple phototrophic bacteria biofilms in photoheterotrophic conditions through microbial photo-electrosynthesis.

ABSTRACT: Reducing greenhouse gas emissions is critical for humanity nowadays, but it can be beneficial by developing engineered systems that valorize CO₂ into commodities, thus mimicking nature's wisdom. Purple phototrophic bacteria (PPB) naturally accept CO₂ into their metabolism as a primary redox sink system in photo-heterotrophy. Dedicated use of this feature for developing sustainable processes (e.g., through negative-emissions photo-bioelectrosynthesis) requires a deep knowledge of the inherent metabolic mechanisms. This work provides evidence of tuning the PPB metabolic mechanisms upon redox stressing through negative polarization (-0.4 and -0.8 V vs. Ag/AgCl) in photo-bioelectrochemical devices. A mixed PPB-culture upregulates its ability to capture CO₂ from

SUBMITTER: Diaz-Rullo Edreira S 

PROVIDER: S-EPMC11574181 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature