Article, 2024

Carbon monoxide inhibition on acidogenic glucose fermentation and aceticlastic methanogenesis

Bioresource Technology, ISSN 0960-8524, 1873-2976, Page 131076, 10.1016/j.biortech.2024.131076

Contributors

Postacchini, Pietro 0000-0001-5177-4792 [1] [2] Grimalt-Alemany, Antonio 0000-0001-7652-743X [1] Ghofrani-Isfahani, Parisa 0000-0002-4589-7806 [1] Treu, Laura 0000-0002-5053-4452 [3] Campanaro, Stefano 0000-0002-9431-1648 [3] Menin, Lorenzo 0000-0002-7035-5187 [2] Patuzzi, Francesco 0000-0002-9573-6947 [2] Baratieri, Marco 0000-0002-0706-6577 [2] Angelidaki, Irini 0000-0002-6357-578X (Corresponding author) [1]

Affiliations

  1. [1] Technical University of Denmark
    2. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  2. [2] Free University of Bozen-Bolzano
    3. [NORA names: Italy; Europe, EU; OECD];
  3. [3] University of Padua
    4. [NORA names: Italy; Europe, EU; OECD]

Abstract

Syngas and CO-rich off-gases are key chemical platforms to produce biofuels and bioproducts. From the perspective of optimizing and up-scaling CO co-digestion with organic waste streams, this study aims at assessing and quantifying the inhibitory effects of CO on acidogenic glucose fermentation and aceticlastic methanogenesis. Mesophilic cultures were fed in two sets of batch assays, respectively, with glucose and acetate while being exposed to dissolved CO in equilibrium with partial pressures in the range of 0.25-1.00 atm. Cumulative methane production and microbial monitoring revealed that aceticlastic methanogenic archaea were significantly inhibited (2-20 % of the methane production of CO non-exposed cultures). The acidogenic glucose degrading community was also inhibited by CO, although, thanks to its functional redundancy, shifted its metabolism towards propionate production. Future work should assess the sensitivity of hereby estimated CO inhibition parameters, e.g., on the simulation output of a continuous syngas co-digestion process with organic substrates.

Keywords

CO, acetate, aceticlastic methanogenesis, archaea, assay, batch assays, biofuels, bioproducts, carbon, carbon monoxide inhibition, chemical, chemical platform, co-digestion, co-digestion process, community, culture, cumulative methane production, degrading community, effect of CO, equilibrium, fermentation, functional redundancy, glucose, glucose fermentation, inhibition, inhibition parameters, inhibitory effect, inhibitory effect of CO, mesophilic culture, metabolism, methane production, methanogenesis, methanogenic archaea, microbial monitoring, monitoring, off-gases, organic substrates, organic waste streams, output, parameters, partial pressure, perspective, platform, pressure, process, production, propionate, propionate production, range, redundancy, sensitivity, sets, simulation, simulation output, stream, study, substrate, syngas, waste streams

Funders

  • European Commission

Data Provider: Digital Science

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