Enhancing performance and durability of PVDF-ceramic composite membranes in microbial fuel cells using natural rhamnolipids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F24%3A00012473" target="_blank" >RIV/46747885:24620/24:00012473 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0378775324012096?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378775324012096?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jpowsour.2024.235257" target="_blank" >10.1016/j.jpowsour.2024.235257</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhancing performance and durability of PVDF-ceramic composite membranes in microbial fuel cells using natural rhamnolipids

Popis výsledku v původním jazyce

Ceramic membranes are widely used in microbial fuel cells (MFCs) owing to their cost-effectiveness and availability. However, these membranes often face challenges such as biofouling and negative mass-transfer effects. This study explored the use of a polymer layer to mitigate these issues, focusing on a polyvinylidene fluoride (PVDF) nanofibre membrane with various surface modifications. The modifications included alkaline treatment (PVDF-OH), rhamnolipids treatment (PVDF/BS), and a combination of both (PVDF-OH/BS). The ceramic membrane integrated with PVDF-OH/BS achieved the highest power density of 13.8 W m−3, which was 38 % higher than that of the unmodified ceramic membrane. Additionally, during the long-term study (days 90–101), the Ceramic + PVDF-OH/BS maintained a 64 % higher power performance compared to the unmodified ceramic membrane, indicating superior antifouling properties. Electrochemical and surface characterisation revealed that rhamnolipid-modified PVDF nanofibers enhanced fouling resistance. The findings demonstrate that natural biosurfactants which can be produced in situ within MFCs, can form a protective layer over membranes and significantly enhance their long-term power performance. This study represents the first instance of using natural microbial biosurfactants to improve membrane efficiency in a bioelectrochemical system.

Název v anglickém jazyce

Enhancing performance and durability of PVDF-ceramic composite membranes in microbial fuel cells using natural rhamnolipids

Popis výsledku anglicky

Ceramic membranes are widely used in microbial fuel cells (MFCs) owing to their cost-effectiveness and availability. However, these membranes often face challenges such as biofouling and negative mass-transfer effects. This study explored the use of a polymer layer to mitigate these issues, focusing on a polyvinylidene fluoride (PVDF) nanofibre membrane with various surface modifications. The modifications included alkaline treatment (PVDF-OH), rhamnolipids treatment (PVDF/BS), and a combination of both (PVDF-OH/BS). The ceramic membrane integrated with PVDF-OH/BS achieved the highest power density of 13.8 W m−3, which was 38 % higher than that of the unmodified ceramic membrane. Additionally, during the long-term study (days 90–101), the Ceramic + PVDF-OH/BS maintained a 64 % higher power performance compared to the unmodified ceramic membrane, indicating superior antifouling properties. Electrochemical and surface characterisation revealed that rhamnolipid-modified PVDF nanofibers enhanced fouling resistance. The findings demonstrate that natural biosurfactants which can be produced in situ within MFCs, can form a protective layer over membranes and significantly enhance their long-term power performance. This study represents the first instance of using natural microbial biosurfactants to improve membrane efficiency in a bioelectrochemical system.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Power Sources

ISSN

0378-7753

e-ISSN

—

Svazek periodika

621

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

001302021800001

EID výsledku v databázi Scopus

2-s2.0-85202024414