Biogas Purification by Methane and Acetate Manufacturing DOI Creative Commons

J.A. Klein

GCB Bioenergy, Journal Year: 2024, Volume and Issue: 17(1)

Published: Dec. 17, 2024

ABSTRACT Wastewater treatment plants have two persistent financial and energetic drains, the carbon dioxide content of biogas, which limits its commercial sale, presence trace organics in wastewater effluent, damages aquatic ecosystem, like Great Barrier Reef. Biogas is a renewable methane resource that underutilized due to variable CO 2 (~40%). energy intensive purify limited by economy scale (> 8.85 GJ/h) large‐scale purification methods, thus small‐scale processes require development. Electrocatalytic microbes native been shown convert CH 4 acetate, however complete conversion intensive. Here we show low power bioelectrochemical fuel cell design biogas pipeline quality (98%), manufacture and/or remove organics, using HCO 3 − as transport charge carrier from dissolved through an anion exchange membrane. This decreased required separate on molar basis, resulting net recovery similar current industrial systems. Magnesium anode use resulted positive system. Tests evaluated influence cathode potential density, ion flux rates efficiencies production, optimization at −0.7 V versus standard hydrogen electrode (SHE). A techno‐economic analysis modeled return investment for scaled‐up production small streams are otherwise financially unrecoverable. Carbon sequestration methane, acetate solid fertilizers demonstrated profitable efficient waste‐to‐resource conversion.

Language: Английский

Microbial electrosynthesis with Clostridium ljungdahlii benefits from hydrogen electron mediation and permits a greater variety of products DOI Creative Commons
Santiago T. Boto, Bettina Bardl, Falk Harnisch

et al.

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(11), P. 4375 - 4386

Published: Jan. 1, 2023

Microbial electrosynthesis (MES) is a very promising technology addressing the challenge of carbon dioxide recycling into organic compounds, which might serve as building blocks for (bio)chemical industry. However, poor process control and understanding fundamental aspects such microbial extracellular electron transfer (EET) currently limit further developments. In model acetogen Clostridium ljungdahlii, both direct indirect consumption via hydrogen have been proposed. without clarification neither targeted development catalyst nor engineering MES are possible. this study, cathodic demonstrated to be dominating source C. ljungdahlii at electroautotrophic allowing superior growth biosynthesis, compared previously reported using pure cultures. Hydrogen availability distinctly controlled an either planktonic- or biofilm-dominated lifestyle ljungdahlii. The most robust operation yielded higher planktonic cell densities in mediated process, uncoupling biofilm formation. This coincided with increase metabolic activity, acetate titers, production rates (up 6.06 g L-1 0.11 d-1). For first time, was also revealed deliver other products than significant amounts: here up 0.39 glycine 0.14 ethanolamine. Hence, deeper comprehension electrophysiology shown key designing improving bioprocess strategies research.

Language: Английский

Citations

41
H2 mediated mixed culture microbial electrosynthesis for high titer acetate production from CO2 DOI Creative Commons
Yanhong Bian,

Aaron Leininger,

Harold D. May

et al.

Environmental Science and Ecotechnology, Journal Year: 2023, Volume and Issue: 19, P. 100324 - 100324

Published: Sept. 28, 2023

Microbial electrosynthesis (MES) converts CO2 into value-added products such as volatile fatty acids (VFAs) with minimal energy use, but low production titer has limited scale-up and commercialization. Mediated electron transfer via H2 on the MES cathode shown a higher conversion rate than direct biofilm-based approach, it is tunable potential control accelerates from CO2. Here we report high acetate titers can be achieved improved in situ supply by nickel foam decorated carbon felt mixed community systems. Acetate concentration of 12.5 g L-1 was observed 14 days nickel-carbon at poised -0.89 V (vs. standard hydrogen electrode, SHE), which much cathodes using stainless steel (5.2 L-1) or alone (1.7 same projected surface area. A 16.0 over long-term operation for 32 days, crossover batch operation, additional (5.8 also found abiotic anode chamber. We Faradaic efficiencies production, attributed to partial utilization electrosynthesis. The selective demonstrated this study shows H2-mediated common materials carries good promise development.

Language: Английский

Citations

23
Transition towards renewable nano-carbon-based electrocatalysts in electrochemical and bio-electrochemical technologies DOI
Shraddha Yadav, Azhan Ahmad,

Monali Priyadarshini

et al.

FlatChem, Journal Year: 2024, Volume and Issue: 44, P. 100623 - 100623

Published: Feb. 7, 2024

Language: Английский

Citations

9
Selective butyric acid production from CO2 and its upgrade to butanol in microbial electrosynthesis cells DOI Creative Commons
Meritxell Romans-Casas, Laura Feliu-Paradeda, Michele Tedesco

et al.

Environmental Science and Ecotechnology, Journal Year: 2023, Volume and Issue: 17, P. 100303 - 100303

Published: July 26, 2023

Microbial electrosynthesis (MES) is a promising carbon utilization technology, but the low-value products (i.e., acetate or methane) and high electric power demand hinder its industrial adoption. In this study, electrically efficient MES cells with low ohmic resistance of 15.7 mΩ m2 were operated galvanostatically in fed-batch mode, alternating periods CO2 H2 availability. This promoted acetic acid ethanol production, ultimately triggering selective (78% on basis) butyric production via chain elongation. An average rate 14.5 g m−2 d−1 was obtained at an applied current 1.0 1.5 mA cm−2, being Megasphaera sp. key elongating player. Inoculating second cell catholyte containing enriched community resulted same as previous cell, lag phase reduced by 82%. Furthermore, interrupting feeding setting constant pH2 1.7–1.8 atm cathode compartment triggered solventogenic butanol pH below 4.8. The design voltages 2.6–2.8 V remarkably energy requirement 34.6 kWhel kg−1 produced, despite coulombic efficiencies restricted to 45% due cross-over O2 through membrane. conclusion, study revealed optimal operating conditions achieve energy-efficient from suggested strategy further upgrade it valuable butanol.

Language: Английский

Citations

18
Using a non-precious metal catalyst for long-term enhancement of methane production in a zero-gap microbial electrosynthesis cell DOI
Bin Bian, Najiaowa Yu, Amir Akbari

et al.

Water Research, Journal Year: 2024, Volume and Issue: 259, P. 121815 - 121815

Published: May 21, 2024

Language: Английский

Citations

6
Microbial electrosynthesis: carbonaceous electrode materials for CO2 conversion DOI Creative Commons

G.S. Lekshmi,

Kateryna Bazaka, Seeram Ramakrishna

et al.

Materials Horizons, Journal Year: 2022, Volume and Issue: 10(2), P. 292 - 312

Published: Dec. 2, 2022

Microbial electrosynthesis (MES) is a sustainable approach to address greenhouse gas (GHG) emissions using anthropogenic carbon dioxide (CO2) as building block create clean fuels and highly valuable chemicals. The efficiency of MES-based CO2 conversion closely related the performance electrode material and, in particular, cathode for which carbonaceous materials are frequently used. Compared expensive metal electrodes, biocompatible with high specific surface area, wide range possible morphologies, excellent chemical stability, their use can maximize growth bacteria enhance electron transfer rates. Examples include MES cathodes based on nanotubes, graphene, graphene oxide, graphite, graphite felt, graphitic nitride (g-C3N4), activated carbon, dots, fibers, brushes, cloth, reticulated vitreous foam, MXenes, biochar. Herein, we review state-of-the-art MES, including thermodynamic kinetic processes that underpin conversion, well impact reactor type configuration, selection electrolytes, product selectivity, novel methods stimulating biomass accumulation. Specific emphasis placed materials, 3D bioprinting features, waste-derived or biochar an outstanding further improving environmental conditions carbon-hungry microbes step toward circular economy. would be technique develop rocket bioderived products atmosphere Mars mission.

Language: Английский

Citations

28
Microbial electrosynthesis of acetate from CO2 in three-chamber cells with gas diffusion biocathode under moderate saline conditions DOI Creative Commons
Paolo Dessì,

Claribel Buenaño-Vargas,

Santiago Martínez-Sosa

et al.

Environmental Science and Ecotechnology, Journal Year: 2023, Volume and Issue: 16, P. 100261 - 100261

Published: March 21, 2023

The industrial adoption of microbial electrosynthesis (MES) is hindered by high overpotentials deriving from low electrolyte conductivity and inefficient cell designs. In this study, a mixed consortium originating an anaerobic digester operated under saline conditions (∼13 g L-1 NaCl) was adapted for acetate production bicarbonate in galvanostatic (0.25 mA cm-2) H-type cells at 5, 10, 15, or 20 NaCl concentration. acetogenic communities were successfully enriched only 5 10 NaCl, revealing inhibitory threshold about 6 Na+. planktonic then used as inoculum 3D printed, three-chamber equipped with gas diffusion biocathode. fed CO2 galvanostatically 1.00 cm-2). highest rate 55.4 m-2 d-1 (0.89 d-1), 82.4% Coulombic efficiency, obtained concentration 1 cm-2 applied current, achieving average 44.7 kg MWh-1. Scanning electron microscopy 16S rRNA sequencing analysis confirmed the formation cathodic biofilm dominated Acetobacterium sp. Finally, three printed hydraulically connected series to simulate MES stack, three-fold rates than single 0.25 cm-2. This confirms that are efficient scalable technology bio-electro recycling moderate (5 can help reduce their power demand while preserving activity acetogens.

Language: Английский

Citations

15
Algae-derived electrodes in bioelectrochemical systems DOI
Gahyun Baek, Jechan Lee

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(3), P. 112535 - 112535

Published: March 18, 2024

Language: Английский

Citations

5
CO2-refinery through microbial electrosynthesis (MES): A concise review on design, operation, biocatalysts and perspectives DOI Creative Commons
Péter Bakonyi, László Koók, Tamás Rózsenberszki

et al.

Journal of CO2 Utilization, Journal Year: 2022, Volume and Issue: 67, P. 102348 - 102348

Published: Dec. 5, 2022

Microbial electrosynthesis cells (MES) are devices with demonstrated capability to treat CO2-containing gaseous streams and alongside, generate certain valuable chemical products, particularly methane gas, carboxylic acids, alcohols, etc. Although there many varieties of MES their own individual characteristics, all systems have a lot in common, starting from design operational features the underlying microbiological phenomena. With support literature publications related numerical data, this paper reviews analyses most important identify general tendencies practical recommendations pertaining (electrodes, membranes), operation (cathode potential, CO2 feeding, temperature, pH) biocatalysts ensuring an enhanced performance. As result, several key-issues provided (i) successfully implement setups as well (ii) outline perspectives technology towards further promotion development CO2-refinery process.

Language: Английский

Citations

20
Co-valorization of Food Waste and CO2 to Produce Volatile Fatty Acids Using Liter-Scale Tubular Microbial Electrosynthesis Cells DOI
Yanhong Bian,

Aaron Leininger,

Weilan Zhang

et al.

ACS ES&T Engineering, Journal Year: 2024, Volume and Issue: 4(9), P. 2243 - 2251

Published: Aug. 20, 2024

This study presents the simultaneous conversion of food waste and CO2 into volatile fatty acids (VFAs) using a 6 L tubular microbial electrosynthesis cell (MES). The MES reactor uses bioanode to convert current CO2, while on cathode, H2 is produced subsequently consumed by cathode microbes for VFAs. reveals that system performance impacted organic loading, applied voltage, flow rate, optimal operational conditions achieve VFA titer 1763 mg/L with Coulombic efficiency (CE) exceeding 90% at anode, highlighting efficient electron recovery from waste. Resistance analysis indicates contributed most resistance, community shows synergy between fermentative electroactive bacteria in anode dominant acetogens facilitating synthesis, respectively. research underscores MES's potential sustainable treatment valorization valuable VFAs, contributing management greenhouse gas mitigation strategies.

Language: Английский

Citations

4