Impact of extended starvation conditions on bioelectrocatalytic activity of a methane-producing microbial electrolysis cell.
Bioresour Technol
; : 131491, 2024 Sep 15.
Article
in En
| MEDLINE
| ID: mdl-39288836
ABSTRACT
The performance of a methane-producing microbial electrolysis cell (MEC) markedly relies on the activity and resilience of its electroactive anodic biofilm. Here, the capability of an MEC anodic biofilm to recover following extended starvation periods (90â¯days) and to function under different applied anode potentials (i.e., +0.20 and -0.10â¯V, vs. Standard Hydrogen Electrode-SHE) was investigated. Cyclic voltammetry proved to be an insightful means to characterize the biofilm electrocatalytic activity and to track the dynamics of biofilm reactivation. Under all tested conditions the anodic biofilm rapidly and completely recovered from starvation in less than 144â¯h. However, starvation reduced the electron transfer redundancy of the biofilm causing the disappearance of redox sites operating at the more positive potentials (around 0.0â¯V vs. SHE) and retaining those having a formal potential lower than -0.18â¯V vs. SHE. This study presents compelling evidence for the resilience and efficiency of methane-producing MEC.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Bioresour Technol
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2024
Document type:
Article
Affiliation country:
Italy
Country of publication:
United kingdom