Alleviation of Organic Load Inhibition and Enhancement of Caproate Biosynthesis via Fe3O4 Addition in Anaerobic Fermentation of Food Waste

Fermentation, Journal Year: 2025, Volume and Issue: 11(4), P. 160 - 160

Published: March 21, 2025

The conversion of food waste into caproate via anaerobic chain elongation has gained increasing attention. However, limitations such as reliance on external electron donors, low carbon efficiency under high loads, and unclear microbial mechanisms hinder its application. Fe3O4 reportedly can act an shuttle mitigate product inhibition during digestion sludge. Thus, addition could overcome the challenges from loads certain conditions. In this study, experiments were conducted batch semi-continuous This study investigated effects organic hydrolysis, acidification, fermentation. Furthermore, influences production profile varying substrate-to-inoculation ratios dosages examined. key results harvested trial indicate that severely inhibited production. And in tests, at F/M ratio 1:2, dosage evidently enhanced by promoting lactate to butyrate elongation. At 6:1, maximum yield reached 0.45 g COD/g COD 2.0 g/L. High load reduced abundance butyrate-producing bacteria (Latilactobacillus Stenotrophomonas). Nevertheless, increased caproate-producing (Caproiciproducens). conclusion, optimal stimulating transport enriching relevant microorganisms.

Language: Английский

---

Harnessing highly-loaded lactate to shape a robust chain elongation microbiome for enhanced n-caproate recovery from fruit and vegetable wastes: Insights into microbiome structure and key functional gene expression

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162504 - 162504

Published: April 1, 2025

Language: Английский

---

Effect of inoculum source, electron donors, and substrates on medium-chain fatty acid production from palm oil mill effluent

Industrial Crops and Products, Journal Year: 2023, Volume and Issue: 206, P. 117654 - 117654

Published: Oct. 27, 2023

Language: Английский

---

CO2 uptake in ethanol-driven chain elongation system: Microbial metabolic mechanisms

Water Research, Journal Year: 2023, Volume and Issue: 247, P. 120810 - 120810

Published: Oct. 29, 2023

Language: Английский

---

Mechanism and Effect of Amino Acids on Lactic Acid Production in Acidic Fermentation of Food Waste

Fermentation, Journal Year: 2024, Volume and Issue: 10(4), P. 179 - 179

Published: March 25, 2024

Amino acids, particularly the ones that cannot be synthesised during fermentation, are reportedly to key nutrients for anaerobic fermentation processes, and some of acids also intermediate products protein-rich waste. To date, particularly, there is a lack research on effects amino such as cysteine, glycine, aspartic acid, valine, lactic production from food waste mechanisms involved in process. Thus, this study investigated four different acid acidic Firstly, batch experiments synthetic at pHs (4.0, 5.0, 6.0) were executed. The results harvested showed higher LA concentrations yields could obtained pH 5.0 6.0, compared with those 4.0. yield was slightly lower than 6.0. Furthermore, caustic consumption much lower. Therefore, we conducted additions (cysteine, valine) under 5.0. or even opposite influences production. Glycine presented no noticeable production, but cysteine evidently enhanced by 13%. Cysteine addition increased α-glucosidase activity hydrolysis rate simultaneously abundance Lactobacillus acidification stage well lactate dehydrogenase, which all favoured However, valine reduced 18%, implied seemingly inhibited conversion carbohydrate. In addition, low observed tests appeared detrimental Overall, provides novel insight into regulation adding conditions.

Language: Английский

---

Effects of yeast inoculation methods on caproic acid production and microbial community during anaerobic fermentation of Chinese cabbage waste

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 356, P. 120632 - 120632

Published: March 26, 2024

Language: Английский

---

Enhanced ethanol-driven carboxylate chain elongation by Pt@C in simulated sequencing batch reactors: Process and mechanism

Bioresource Technology, Journal Year: 2023, Volume and Issue: 384, P. 129310 - 129310

Published: June 13, 2023

Language: Английский

---

Toward high carbon recovery: Novel strategies to hindering the occurrence of competitive reactions during chain elongation process

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 419, P. 138340 - 138340

Published: Aug. 3, 2023

Language: Английский

---

Biochar confers significant microbial resistance to ammonia toxicity in n-caproic acid production

Water Research, Journal Year: 2024, Volume and Issue: 266, P. 122367 - 122367

Published: Sept. 1, 2024

Language: Английский

---

Advances in Electricity-Steering Organic Waste Bio-Valorization for Medium Chain Carboxylic Acids Production

Energies, Journal Year: 2023, Volume and Issue: 16(6), P. 2571 - 2571

Published: March 8, 2023

Medium chain carboxylic acids (MCCAs, e.g., caproic acid, caprylic etc.) with 6–12 carbon atoms are valuable platform chemicals produced from organic waste via microbial elongation metabolism named as reversed β-oxidation and fatty acid-biosynthesis cyclical pathway. Recently, many articles reported that electricity could not only serve the external electron donor provide reduction equivalent required for but also regulate microbiome structure metabolic behaviors to promote MCCAs formation. Electricity-steering bioproduction has become an appealing technique valorize low-value waste, paving alternative pathway net-zero emission energy systems sustainable socio-economic development. However, MCCAs’ steered by electric field been comprehensively reviewed. From a systematical analysis of publicly available literature, we first covered basic working principle, fermentation architecture, functional microflora, production driven electricity. The strategies substrate modulation, applied voltage/current regulation, electrode optimization, cooperation stimulation boosting electricity-driven then scrutinized extensively discussed. Ultimately, pressing knowledge gaps potential path forward proposed pointers consistently higher yield transition laboratory market.

Language: Английский

---