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

ACS ES&T Engineering, Год журнала: 2024, Номер 4(9), С. 2243 - 2251

Опубликована: Авг. 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.

Язык: Английский

---

Renewable Hydrogen Production and Storage Via Enzymatic Interconversion of CO₂ and Formate with Electrochemical Cofactor Regeneration

ChemSusChem, Год журнала: 2023, Номер 16(17)

Опубликована: Май 11, 2023

Abstract The urgent need to reduce CO 2 emissions has motivated the development of capture and utilization technologies. An emerging application is transformation into storage chemicals for clean energy carriers. Formic acid (FA), a valuable product reduction, an excellent hydrogen carrier. conversion FA, followed by H release from are conventionally chemically catalyzed. Biocatalysts offer highly specific less energy‐intensive alternative. formate catalyzed dehydrogenase (FDH), which usually requires cofactor function. Several FDHs have been incorporated in bioelectrochemical systems where produced biocathode electrochemically regenerated. production also several microorganisms possessing either hydrogenlyase or hydrogen‐dependent reductase complexes. Combination these two processes can lead ‐recycling cycle production, storage, with potentially lower environmental impact than conventional methods.

Язык: Английский

---

Novel electrochemical strategies for the microbial conversion of CO₂ into biomass and volatile fatty acids using a fluid‐like bed electrode in a three‐phase reactor

Microbial Biotechnology, Год журнала: 2024, Номер 17(1)

Опубликована: Янв. 1, 2024

Abstract Microbial electrosynthesis (MES) constitutes a bioelectrochemical process where bacteria uptake electrons extracellularly from polarized electrode to incorporate them into their anabolic metabolism. However, the efficiency of current MES reactor designs can be lower than expected due limitations regarding electron transfer and mass transport. One most promising bioreactor configurations overcome these bottlenecks is Electrochemical Fluidized Bed Reactor (ME‐FBR). In this study, microbial CO 2 fixation investigated for first time in ME‐FBR operated as 3‐phase (solid–liquid–gas). An electroconductive carbon bed, acting working electrode, was fluidized with gas at different potentials (−0.6, −0.8 −1 V vs. Ag/AgCl) so it could act an donor (biocathode). Under potentials, were evaluated. Autotrophic electroactive microorganisms anaerobic wastewater enriched presence 2‐bromoethanosulfonic acid (BES) inhibit growth methanogens. Cyclic voltammetry analysis revealed interaction between cathode. Furthermore, volatile fatty acids like propionate, formate acetate detected culture supernatant. Acetate production had maximum rate ca. 1 g L day . Planktonic cell biomass produced under continuous values high 0.7 dry weight. Overall, study demonstrates feasibility employing gaseous substrates electricity energy source generating carboxylic acids.

Язык: Английский

---

Microbial models for biocathodic electrochemical CO2 transformation: A comprehensive review on pure cultures

Bioresource Technology Reports, Год журнала: 2024, Номер 25, С. 101766 - 101766

Опубликована: Янв. 30, 2024

Electroactive microorganisms, either used as pure cultures or mixed populations in complex communities, play a key role microbial electrochemical technologies (MET) and are especially relevant electrosynthesis (MES). Although most MES research focuses on anaerobic organisms, the exploration of aerobic chemolithoautotrophs becomes may help mitigating adverse effect evolution oxygen. Critical avenues for future development involve increasing mechanistic characterizations reactors enhancing understanding thermodynamics energy balance electrode-cell electron transfer. In this review, we primarily concentrate exploring discussing advancements findings field models MES, approximate to model formulation. We highlight potential benefits using axenic bacterial known composition way identify main knowledge gaps further predictive modelling.

Язык: Английский

---

Effect of bicarbonate on hydrogen generation by Zero-Valent iron and its impact on generation of acetic acid by seven different inocula

Bioresource Technology, Год журнала: 2024, Номер 406, С. 131004 - 131004

Опубликована: Июнь 16, 2024

Язык: Английский

---

Microbial Electrosynthesis Meets Synthetic Biology: Bioproduction from Waste Feedstocks

Biotechnology Notes, Год журнала: 2025, Номер 6, С. 157 - 163

Опубликована: Янв. 1, 2025

Язык: Английский

---

Boosting ethanol production rates from carbon dioxide in MES cells under optimal solventogenic conditions

The Science of The Total Environment, Год журнала: 2022, Номер 856, С. 159124 - 159124

Опубликована: Сен. 27, 2022

Язык: Английский

---

Oxygen In The Mix: Is Oxic Microbial Electrosynthesis A Potential Alternative For Biomass Production?

ChemElectroChem, Год журнала: 2024, Номер unknown

Опубликована: Сен. 6, 2024

Abstract Oxic microbial electrosynthesis (oMES) allows the utilization of renewable electricity and industrial gas streams containing CO 2 O for biomass production by cultivating aerobic, autotrophic, hydrogen‐oxidizing bacteria, commonly known as Knallgas bacteria. oMES is likely not a direct competitor to conventional anoxic harnessing aerobic bacteria depends on energetically inefficient assimilatory reduction pathways. However, it might be complementary approach classical from perspective limited land use availability cheap energy. The best characterized bacterium Cupriavidus necator . Extensively studied lithoautotrophic host, C. already offers broad arsenal genetic tools. In contrast, mechanistical knowledge about recently discovered Kyrpidia spormannii limited, but this species shows remarkable growth when cultivated cathodic biofilm in bioelectrochemical systems. addition, first experiments indicate low energy demand production, which order magnitude fermentation with or heterotrophic methanotrophic technologies. Still, many aspects electrochemical cultivation K. need better understood rigorously improved competitive technology making, including electron transfer kinetics, conditions, mass balances, reactor design.

Язык: Английский

---

Potential and challenge in accelerating high-value conversion of CO2 in microbial electrosynthesis system via data-driven approach

Bioresource Technology, Год журнала: 2024, Номер 412, С. 131380 - 131380

Опубликована: Авг. 29, 2024

Язык: Английский

---

Intensification of bioprocesses – definition, examples, challenges and future directions

Physical Sciences Reviews, Год журнала: 2024, Номер 9(10), С. 3273 - 3287

Опубликована: Фев. 28, 2024

Abstract Strategies to reduce cost and emission profiles are becoming increasingly important for the development of affordable sustainable bio-based production. The overall objective process intensification in different industries is achieve substantial benefits terms cost, product concentration quality, while eliminating waste improving safety. Intensification bioprocesses could be a valuable tool enhancing efficiency reducing resource consumption bioproduction. In general, bioprocess defined as an increase bioproduct output relative cell concentration, time, reactor volume or cost. This brief overview provides definition biotechnology, presents several general specific examples, addresses some current challenges.

Язык: Английский

---