A review on biochemistry, microbiology and thermodynamic aspects of propionate: The key intermediate in the anaerobic digestion and wastewater treatment

Desalination and Water Treatment, Год журнала: 2024, Номер 317, С. 100191 - 100191

Опубликована: Янв. 1, 2024

This paper provides a comprehensive review of the biochemistry, microbiology, and thermodynamic aspects propionate (Pr) in anaerobic digestion (AD). Pr is key intermediate AD, playing crucial role process efficiency due to its unique thermodynamics, microbial interactions, biochemical metabolic pathways. However, metabolism remains complex interconnected process, making it challenging fully understand optimize. delves into intricate mechanisms emphasizing relationship with sulfate sulfate-reducing bacteria (SRBs). explores pathways production consumption, elucidating microorganisms their interactions. Furthermore, investigates between syntrophic propionate-oxidizing (SPOB/SRB), examining impact on Pr. Finally, thermodynamics Pr-related reactions, gaining insights factors that influence metabolism. By unraveling complexities this valuable knowledge can be harnessed enhance manipulate for various purposes. Researchers use these findings develop strategies reducing accumulation improving biogas production. Additionally, gained recovery exploited development novel technologies.

Язык: Английский

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Acetate Production from Syngas Produced from Lignocellulosic Biomass Materials along with Gaseous Fermentation of the Syngas: A Review

Microorganisms, Год журнала: 2023, Номер 11(4), С. 995 - 995

Опубликована: Апрель 11, 2023

Biotransformation of lignocellulose-derived synthetic gas (syngas) into acetic acid is a promising way creating biochemicals from lignocellulosic waste materials. Acetic has growing market with applications within food, plastics and for upgrading wide range biofuels bio-products. In this paper, we will review the microbial conversion syngas to acid. This include presentation acetate-producing bacterial strains their optimal fermentation conditions, such as pH, temperature, media composition, enhance acetate production. The influence impurities generated lignocellulose gasification further be covered along means alleviate impurity problems through purification. problem mass transfer limitation gaseous discussed well ways improve uptake during fermentation.

Язык: Английский

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Production of volatile fatty acids by anaerobic digestion of biowastes: Techno-economic and life cycle assessments

Bioresource Technology, Год журнала: 2023, Номер 388, С. 129726 - 129726

Опубликована: Сен. 9, 2023

Production of volatile fatty acids from food waste and lignocellulosic materials has potential to avoid emissions their production petrochemicals provide valuable feedstocks. Techno-economic life cycle assessments using grass produce through anaerobic digestion have been conducted. Uncertainty sensitivity analysis for both were done enable a robust forecast key-aspects the technology deployment at industrial scale. Results show low environmental impact acid with wastes being most beneficial feedstock global warming varying -0.21 0.01 CO2 eq./kg product. Food had greatest economic benefit breakeven selling price 1.11-1.94 GBP/kg (1.22-2.33 USD) in product solution determined analysis. Anaerobic is therefore promising alternative traditional routes, providing benefits.

Язык: Английский

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Propionate production and degradation in the biological wastewater treatment: A mini review on the role of additives in anaerobic digestion

Desalination and Water Treatment, Год журнала: 2024, Номер 319, С. 100555 - 100555

Опубликована: Июнь 20, 2024

Propionate production and consumption are influenced by thermodynamic constraints, microbial competitions, metabolic inhibition. Accumulation of propionate in wastewater can destabilize anaerobic digestion lead to process failure. Anaerobic is one the viable biological methods for its recovery utilization. Additives have been shown modulate consumption, effectively influencing overall performance digestion. This mini review systematically examines application various additives their effects on: (I) (less CH4 more propionate) (II) degradation CH4) goals studied listed recent studies on most used classified them according impact concentration. To our knowledge, limited research has conducted role recovery. No reviewed from or potential mitigate inhibitory effects. enables researchers select suitable additive recover boost mitigating inhibition, as well discussing modern bioreactors.

Язык: Английский

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Fractionation of waste-derived volatile fatty acids by multi-stage adsorption using activated charcoal and Diaion HP-20 resin

Bioengineered, Год журнала: 2025, Номер 16(1)

Опубликована: Фев. 4, 2025

Substituting waste-derived Volatile Fatty Acids (VFAs) with their conventionally applied fossil-derived counterparts in a spectrum of industrial applications necessitates its proper fractionation into individual acids. This study explored multi-stage batch adsorption approach for fractionating acidogenic fermentation VFAs effluents from food waste (FW) and chicken manure (CKM) using Diaion HP-20 activated charcoal. Initial screening at different washing conditions pH (3.5 6.5) revealed the unwashed granular-activated charcoal (GAC-Unwashed) milli-Q water-washed (DI-MQ Washed) as most promising candidates VFA synthetic mixture 4 gL−1. At 3.5 (97%). While 6.5 (>pKa), selectively targeted VA (79%) CA (100%). Fractionating FW CKM were conducted two-stage process optimal results being achieved initial (5.3) below pKa (3.5), respectively. The first stage primarily higher molecular weight (MW) (FW:99.1% CA, CKM:72.9% butyric (BA)) minor quantity lower ones (FW:56.5% BA, CKM:29.3% propionic (PA)), leaving AA intact. Subsequent stages aimed to isolate by adsorbing remaining low MW (FW:58.9% CKM:27.8% PA, 70% BA) other than AA, indicating effluent preserving purifying AA. Applied selective offers method broaden applications.

Язык: Английский

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Promoting zirconia with carbon: enhanced hybrid ZrO2/C catalyst for the ketonization of diluted aqueous acetic acid

Carbon, Год журнала: 2025, Номер unknown, С. 120203 - 120203

Опубликована: Март 1, 2025

Язык: Английский

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Effect of pH on the selective electrodialytic recovery of acidogenic-derived volatile fatty acids

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 132550 - 132550

Опубликована: Март 1, 2025

Язык: Английский

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Impact of thermal pretreatment on food waste chemical characteristics alteration during anaerobic fermentation with Saccharomyces cerevisiae inoculation: Protein vs carbohydrate

Biomass and Bioenergy, Год журнала: 2025, Номер 197, С. 107801 - 107801

Опубликована: Март 18, 2025

Язык: Английский

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Disruption-induced changes in syntrophic propionate and acetate oxidation: flocculation, cell proximity, and microbial activity

Biotechnology for Biofuels and Bioproducts, Год журнала: 2025, Номер 18(1)

Опубликована: Апрель 19, 2025

Abstract Background Syntrophic propionate- and acetate-oxidising bacteria (SPOB SAOB) play a crucial role in biogas production, particularly under high ammonia conditions that are common anaerobic degradation of protein-rich waste streams. These rely on close interactions with hydrogenotrophic methanogens to facilitate interspecies electron transfer maintain thermodynamic feasibility. However, the impact mixing-induced disruption these essential syntrophic systems remains largely unexplored. This study investigates how magnetic stirring orbital shaking influence dynamics, microbial community composition, gene expression enrichment communities high-ammonia conditions. Results Stirring significantly delayed initiation propionate one culture completely inhibited it other two parallel cultures, whereas acetate was less affected. Computational fluid dynamics modelling revealed generated higher shear rates (~ 20 s −1 ) uniform cell distribution, while led lower accumulation at bottom bottle. Visual observations confirmed floc formation, promoted larger flocs compared static control condition, which formed smaller sheet-like biofilm. Microbial analysis identified substrate type progress as primary drivers structure, motion displaying minimal influence. metatranscriptomic motion-induced downregulation associated motility, surface sensing, biofilm formation SAOB another bacterial species expressing genes for glycine synthase reductase pathway. also suppressed oxalate–formate antiporter SPOB, suggesting its dependence spatial proximity this energy-conserving mechanism. The strongest changes were observed methanogens, indicating coupling first last steps methanogenesis, likely an adaptive strategy efficient energy conservation. Other downregulated included ferrous iron transporters transfer-associated enzymes. Conclusions highlights critically disrupts initial connection between SPOB exhibit greater tolerance stress disruptive inhibits aggregate formation. findings emphasize importance carefully managing mixing regimes, especially when attempting reactivate ammonia-tolerant degraders experiencing rapid Graphical abstract

Язык: Английский

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Bridging waste stream complexity and VFAs applications: A review of recovery technologies

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 133690 - 133690

Опубликована: Май 1, 2025

Язык: Английский

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