GO/PEDOT modified biocathodes promoting CO2 reduction to CH4 in microbial electrosynthesis

2020 ◽  
Vol 4 (6) ◽  
pp. 2987-2997 ◽  
Author(s):  
Qing Li ◽  
Qian Fu ◽  
Hajime Kobayashi ◽  
Yuting He ◽  
Zhuo Li ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Co2 Reduction ◽  
Pedot Film ◽  
Microbial Electrosynthesis

A GO/PEDOT film effectively enhances methanogenic biofilm formation and promotes the CH4 producing performance of biocathodes.

Bioplastic Production from the Microbial Electrosynthesis of Acetate through CO2 Reduction

2021 ◽  
Vol 35 (19) ◽  
pp. 15978-15986
Author(s):  
Kang Zhang ◽  
Yonghang Zhou ◽  
Tianshun Song ◽  
Jingjing Xie
Keyword(s):  
Co2 Reduction ◽  
Microbial Electrosynthesis

scholarly journals Ammonium as a Carbon-Free Electron and Proton Source in Microbial Electrosynthesis Processes

2020 ◽  
Vol 12 (8) ◽  
pp. 3081 ◽  
Author(s):  
Vasan Sivalingam ◽  
Carlos Dinamarca ◽  
Gamunu Samarakoon ◽  
Dietmar Winkler ◽  
Rune Bakke
Keyword(s):  
Co2 Reduction ◽  
Organic Substances ◽  
Energy Research ◽  
Biogas Upgrading ◽  
Microbial Electrosynthesis ◽  
Proton Source ◽  
Biomethane Production ◽  
Anodic Reactions ◽  
By Products ◽  
Opinion Article

Biogas upgrading to biomethane with microbial electrosynthesis (MES) is receiving much attention due to increasing biomethane demands and surplus renewable energy. Research has demonstrated the feasibility of MES to increase methane yield by reducing CO2 in anaerobic digestion (AD). Such CO2 reduction occurs at the cathode and requires the supply of both protons and electrons. The most studied sources of protons and electrons are oxidation of organic substances and water, generated at the anode. These anodic reactions, however, also imply the production of CO2 and O2, respectively, both with negative implications for the AD process. A source of protons and electrons without CO2 and O2 as by-products would be beneficial for MES-enhanced biomethane production. This opinion article discusses the possibility of ammonium to serve as a sustainable proton and electron source.

scholarly journals Enhanced CO2 Conversion to Acetate through Microbial Electrosynthesis (MES) by Continuous Headspace Gas Recirculation

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3297 ◽  
Author(s):  
Raúl Mateos ◽  
Ana Sotres ◽  
Raúl M. Alonso ◽  
Antonio Morán ◽  
Adrián Escapa
Keyword(s):  
Co2 Fixation ◽  
High Throughput Sequencing ◽  
Co2 Reduction ◽  
Electrical Energy ◽  
Reactor Performance ◽  
Microbial Electrosynthesis ◽  
Novel Technologies ◽  
Acetogenic Bacteria ◽  
Headspace Gas ◽  
Gas Recirculation

Bioelectrochemical systems (BESs) is a term that encompasses a group of novel technologies able to interconvert electrical energy and chemical energy by means of a bioelectroactive biofilm. Microbial electrosynthesis (MES) systems, which branch off from BESs, are able to convert CO2 into valuable organic chemicals and fuels. This study demonstrates that CO2 reduction in MES systems can be enhanced by enriching the inoculum and improving CO2 availability to the biofilm. The proposed system is proven to be a repetitive, efficient, and selective way of consuming CO2 for the production of acetic acid, showing cathodic efficiencies of over 55% and CO2 conversions of over 80%. Continuous recirculation of the gas headspace through the catholyte allowed for a 44% improvement in performance, achieving CO2 fixation rates of 171 mL CO2 L−1·d−1, a maximum daily acetate production rate of 261 mg HAc·L−1·d−1, and a maximum acetate titer of 1957 mg·L−1. High-throughput sequencing revealed that CO2 reduction was mainly driven by a mixed-culture biocathode, in which Sporomusa and Clostridium, both bioelectrochemical acetogenic bacteria, were identified together with other species such as Desulfovibrio, Pseudomonas, Arcobacter, Acinetobacter or Sulfurospirillum, which are usually found in cathodic biofilms. Moreover, results suggest that these communities are responsible of maintaining a stable reactor performance.

scholarly journals Mo2C-induced hydrogen production enhances microbial electrosynthesis of acetate from CO2 reduction

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Shihao Tian ◽  
Haoqi Wang ◽  
Zhiwei Dong ◽  
Yang Yang ◽  
Hao Yuan ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Co2 Reduction ◽  
Microbial Electrosynthesis
Sign in / Sign up

Export Citation Format

Share Document