Impact of pH in the first-stage of a two-stage anaerobic digestion on metabolic pathways and methane production

Gauthier, Gensollen; Anne-Marie, Pourcher; Anne-Laure, Duedal; Picard, S.; Sophie, le Roux; Peu, Pascal

doi:10.1016/j.biteb.2022.101256

Cited by 6 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…36 As described above, at startup both MES cells were operated at a pH setpoint of 7.2 (70 days for MES-1 and 40 days for MES-2) to obtain duplicate measurements. MES cell operation at near neutral pH is expected to promote both hydrogenotrophic and acetoclastic methanogenic populations 17,41 therefore leading to increased CH 4 production and low concentration of acetate in the cathodic liquid.…”

Section: Impact Of Catholyte Ph On Acetate and Ch 4 Productionmentioning

confidence: 99%

Impact of cathodic pH and bioaugmentation on acetate and CH₄ production in a microbial electrosynthesis cell

Nwanebu,

Jezernik,

Lawson

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Impact Of Catholyte Ph On Acetate and Ch 4 Productionmentioning

confidence: 99%

Impact of cathodic pH and bioaugmentation on acetate and CH₄ production in a microbial electrosynthesis cell

Nwanebu,

Jezernik,

Lawson

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…pH: pH plays a direct role in microbial growth and metabolism, as well as in propionate-oxidizing bacteria, since changing the pH causes a change in electric charge on the cell membrane, which thereafter influences the assimilation of nutrients and the activities of enzymes [58]. Li et al [59] found that the propionate degradation rate was much higher at pH 7.0-8.5 than at pH 6.5 or below.…”

Section: Critical Parameters Influencing the Biodegradation Of Propio...mentioning

confidence: 99%

Emerging Strategies for Enhancing Propionate Conversion in Anaerobic Digestion: A Review

Wang

et al. 2023

Molecules

View full text Add to dashboard Cite

Anaerobic digestion (AD) is a triple-benefit biotechnology for organic waste treatment, renewable production, and carbon emission reduction. In the process of anaerobic digestion, pH, temperature, organic load, ammonia nitrogen, VFAs, and other factors affect fermentation efficiency and stability. The balance between the generation and consumption of volatile fatty acids (VFAs) in the anaerobic digestion process is the key to stable AD operation. However, the accumulation of VFAs frequently occurs, especially propionate, because its oxidation has the highest Gibbs free energy when compared to other VFAs. In order to solve this problem, some strategies, including buffering addition, suspension of feeding, decreased organic loading rate, and so on, have been proposed. Emerging methods, such as bioaugmentation, supplementary trace elements, the addition of electronic receptors, conductive materials, and the degasification of dissolved hydrogen, have been recently researched, presenting promising results. But the efficacy of these methods still requires further studies and tests regarding full-scale application. The main objective of this paper is to provide a comprehensive review of the mechanisms of propionate generation, the metabolic pathways and the influencing factors during the AD process, and the recent literature regarding the experimental research related to the efficacy of various strategies for enhancing propionate biodegradation. In addition, the issues that must be addressed in the future and the focus of future research are identified, and the potential directions for future development are predicted.

show abstract

Evaluation of the Co-anaerobic Digestion of Food and Garden Wastes in a Two-Stage Pilot System

Malinowsky,

Cavali,

Belli

et al. 2024

Waste Biomass Valor

View full text Add to dashboard Cite

Impact of pH in the first-stage of a two-stage anaerobic digestion on metabolic pathways and methane production

Cited by 6 publications

References 36 publications

Impact of cathodic pH and bioaugmentation on acetate and CH₄ production in a microbial electrosynthesis cell

Impact of cathodic pH and bioaugmentation on acetate and CH₄ production in a microbial electrosynthesis cell

Emerging Strategies for Enhancing Propionate Conversion in Anaerobic Digestion: A Review

Evaluation of the Co-anaerobic Digestion of Food and Garden Wastes in a Two-Stage Pilot System

Contact Info

Product

Resources

About

Impact of pH in the first-stage of a two-stage anaerobic digestion on metabolic pathways and methane production

Cited by 6 publications

References 36 publications

Impact of cathodic pH and bioaugmentation on acetate and CH4 production in a microbial electrosynthesis cell

Impact of cathodic pH and bioaugmentation on acetate and CH4 production in a microbial electrosynthesis cell

Emerging Strategies for Enhancing Propionate Conversion in Anaerobic Digestion: A Review

Evaluation of the Co-anaerobic Digestion of Food and Garden Wastes in a Two-Stage Pilot System

Contact Info

Product

Resources

About

Impact of cathodic pH and bioaugmentation on acetate and CH₄ production in a microbial electrosynthesis cell

Impact of cathodic pH and bioaugmentation on acetate and CH₄ production in a microbial electrosynthesis cell