We are analyzing https://link.springer.com/article/10.1007/s42768-024-00213-2.

Title:
The effect of CO2 sparging on high-solid acidogenic fermentation of food waste | Waste Disposal & Sustainable Energy
Description:
Carbon dioxide (CO2), a by-product of acidogenic fermentation, also acts as a reactant that affects carboxylic acid metabolism in reactors. However, the effect of headspace CO2 in an acidogenic leach bed reactor (LBR) is unclear. In this study, high-solid acidogenic fermentation of food waste (FW) in LBRs with different fractions of CO2 (CK: self-generated headspace, T1: 100% N2, T2: 30% CO2 + 70% N2, and T3: 90% CO2 + 10% N2) was performed. CO2 sparging significantly increased the acidogenic performance of FW, with T3 showing the highest soluble product yield of 0.81 g chemical oxygen demand per 1 g volatile solid removal (gCOD/gVSremoval). CO2 sparging prolonged the fermentation of ethanol and lactic acid in T2 and T3 while it hindered the evolution of butyric and caproic acids. The relative abundance of the genus Limosilobacillus was enhanced by CO2 sparging, reinforcing the ethanol and lactic acid metabolic pathways. However, sparging excessive CO2 (≥30% CO2) inhibited the colonization of the genus Clostridium sensu stricto 12, which suppressed the reverse β pathway with butyric and caproic acids as the metabolites. This work provides valuable insights into the targeted production of carboxylic acids from the acidogenic fermentation of FW via CO2 regulation. Graphical abstract
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28 years and 1 months (reg. 1997-05-29).

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Keywords {🔍}

acid, article, fermentation, google, scholar, cas, production, acidogenic, sparging, acids, butyric, ethanol, lactic, anaerobic, day, treatments, waste, headspace, caproic, pathway, microbial, technology, food, products, text, fig, journal, dehydrogenase, metabolic, increased, soluble, pathways, acetic, cod, performance, shown, bioresource, httpsdoiorgjbiortech, reactor, clostridium, chain, content, research, environmental, cycle, effect, liu, carboxylic, product, stricto,

Topics {✒️}

$$\begin{aligned}&{\text{ch}}_{{3}} {\text{ch}}\left {\text{ch}}_{{3}} {\text{ch}}\left {\text{2ch}}_{{3}} {\text{ch}}\left text{gcod}/{\text{gvs}}_{\text{removal}} {\text{6 kj}}/{\text{mol}}\end{aligned}$$ {\text{1 kj}}/{\text{mol}}\end{aligned}$$ 0{\text{ kj}}/{\text{mol}}\end{aligned}$$ {\text{3 kj}}/{\text{mol}}\end{aligned}$$ {\text{2kj}}/{\text{mol}}\end{aligned}$$ {\text{4kj}}/{\text{mol}}\end{aligned}$$ text{cod}_{\text{equivalent}}\div aminex hpx-87h resin-based acyl-coa thioesterase ycia pct propionate coa-transferase por pyruvate-ferredoxin/flavodoxin oxidoreductase acyl-coa thioesterase ii tesa acyl-coa thioesterase }_{\text{removal}} mut methylmalonyl-coa mutase pyruvate-ferredoxin/flavodoxin oxidoreductase anaerobic carbon-monoxide dehydrogenase adenosine triphosphate-citric lyase article download pdf acetaldehyde dehydrogenase/alcohol dehydrogenase ccl citryl-coa lyase high-concentration n-caproic acid ccs citryl-coa synthetase photo-diode array detector $$\begin{aligned}&{\text{ redox cofactor nadh/nad+ acyl-coa thioesterase fhs formate-tetrahydrofolate ligase short-chain fatty acids $$\text{soluble product yield} {\text{cooh}} acsb acetyl-coa synthase pfld formate c-acetyltransferase $$\text{carbohydrate}=100\%-\left high-pressure anaerobic processes carbohydrate-rich food waste nicotinamide adenine dinucleotide ethanol-driven chain elongation acetyl-coa acetyl coenzyme citryl-coa lyase citryl-coa synthetase high-solid anaerobic fermentation volatile solid removal lactate-based chain elongation dld d-lactate dehydrogenase high-solids anaerobic digestion

Schema {🗺️}

WebPage:
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         description:Carbon dioxide (CO2), a by-product of acidogenic fermentation, also acts as a reactant that affects carboxylic acid metabolism in reactors. However, the effect of headspace CO2 in an acidogenic leach bed reactor (LBR) is unclear. In this study, high-solid acidogenic fermentation of food waste (FW) in LBRs with different fractions of CO2 (CK: self-generated headspace, T1: 100% N2, T2: 30% CO2 + 70% N2, and T3: 90% CO2 + 10% N2) was performed. CO2 sparging significantly increased the acidogenic performance of FW, with T3 showing the highest soluble product yield of 0.81 g chemical oxygen demand per 1 g volatile solid removal (gCOD/gVSremoval). CO2 sparging prolonged the fermentation of ethanol and lactic acid in T2 and T3 while it hindered the evolution of butyric and caproic acids. The relative abundance of the genus Limosilobacillus was enhanced by CO2 sparging, reinforcing the ethanol and lactic acid metabolic pathways. However, sparging excessive CO2 (≥30% CO2) inhibited the colonization of the genus Clostridium sensu stricto 12, which suppressed the reverse β pathway with butyric and caproic acids as the metabolites. This work provides valuable insights into the targeted production of carboxylic acids from the acidogenic fermentation of FW via CO2 regulation.
         datePublished:2025-03-14T00:00:00Z
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      headline:The effect of CO2 sparging on high-solid acidogenic fermentation of food waste
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      name:College of Environment & Ecology, Hunan Agricultural University, Changsha, China
      name:Federal Research Center “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow, Russia
      name:College of Environment & Ecology, Hunan Agricultural University, Changsha, China
      name:College of Environment & Ecology, Hunan Agricultural University, Changsha, China

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