Kinetic and thermodynamic effects of temperature on methanogenic degradation of acetate, propionate, butyrate and valerate

Li, Qian; Liu, Yaqian; Yang, Xiaohuan; Zhang, Jiawen; Lü, Bin; Chen, Rong

doi:10.1016/j.cej.2020.125366

Cited by 67 publications

(19 citation statements)

References 33 publications

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“…Almost no difference was observed between the groups with and without biochar addition. Propionic and butyric acids are commonly considered difficult to be oxidized because of thermodynamically unfavourability without the syntrophic hydrogen consuming of methanogens [ 28 ]. Moreover, microbe concentrations of propionic and butyric oxidizing bacteria are much lower compared with methanogens.…”

Section: Resultsmentioning

confidence: 99%

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

Kobayashi

et al. 2020

Biotechnology Reports

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Highlights Rick husk biochar addition mitigated the pH decrease during high load sorghum AD. 20 g/L biochar addition reduced the peak total VFA by 375 mg/L at F/M ratio of 1.2. Maximum methane production rate was increased by 25 % with 15 g/L biochar addition. Lag phase time was decreased by 45 % with 15 g/L biochar addition.

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Section: Resultsmentioning

confidence: 99%

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

Kobayashi

et al. 2020

Biotechnology Reports

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“…Propionate build-up is often associated with stress imposed upon the microbial community, such as increased loading rate or presence of toxic compounds. Important drivers for propionate degradation and community assembly in anaerobic digesters include temperature, propionate concentration, feeding rate, pH, and ammonia (Ariesyady et al 2007;Chen et al 2020;Li et al 2020;Li et al 2018;Westerholm et al 2018;Worm et al 2011). Anaerobic digesters are generally operated in the pH range 7-8 and temperature ranges of 37-40°C or 50-55°C.…”

Section: Environmental Factors Governing Spobmentioning

confidence: 99%

“…Higher temperature increases the available energy of propionate oxidation (Guo et al 2021b), with propionate-fed batch assays demonstrating nearly three-fold higher maximum specific growth rate for microbial communities growing at 55°C than at 35°C (Li et al 2020).…”

Section: Temperaturementioning

confidence: 99%

Syntrophic propionate-oxidizing bacteria in methanogenic systems

Westerholm

Całusińska

Dolfing

2021

FEMS Microbiology Reviews

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The mutual nutritional cooperation underpinning syntrophic propionate degradation provides a scant amount of energy for the microorganisms involved, so propionate degradation often acts as a bottleneck in methanogenic systems. Understanding the ecology, physiology, and metabolic capacities of syntrophic propionate-oxidizing bacteria is of interest in both engineered and natural ecosystems, as it offers prospects to guide further development of technologies for biogas production and biomass-derived chemicals, and is important in forecasting contributions by biogenic methane emissions to climate change. Syntrophic propionate-oxidizing bacteria are distributed across different phyla. They can exhibit broad metabolic capabilities in addition to syntrophy (e.g. fermentative, sulfidogenic, and acetogenic metabolism) and demonstrate variations in interplay with cooperating partners, indicating nuances in their syntrophic lifestyle. In this review, we discuss distinctions in gene repertoire and organization for the methylmalonyl-CoA pathway, hydrogenases and formate dehydrogenases, and emerging facets of (formate/hydrogen/direct) electron transfer mechanisms. We also use information from cultivations, thermodynamic calculations, and omic analyses as the basis for identifying environmental conditions governing propionate oxidation in various ecosystems. Overall, this review improves basic and applied understanding of syntrophic propionate-oxidizing bacteria and highlights knowledge gaps, hopefully encouraging future research and engineering on propionate metabolism in biotechnological processes.

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“…Of interest is the relatively high hydrogenotrophic SMA, which indicates that acetate is possibly syntrophically methanised via oxidation to hydrogen and carbon dioxide. Note that syntrophic acetate oxidation is energetically more favorable at elevated temperature and high acetate concentration and is more often observed as the dominant pathway in a large number of thermophilic anaerobic reactors (van Lier, 1996;Westerholm et al, 2016;Li et al, 2020). Moreover, hydrogenotrophic methanogenesis is commonly observed at elevated salt concentrations (De Vrieze et al, 2016).…”

Section: Conversion Rates and Methanogenic Activitymentioning

confidence: 99%

Anaerobic Conversion of Saline Phenol-Containing Wastewater Under Thermophilic Conditions in a Membrane Bioreactor

Sierra

Rea

Cerqueda-García

et al. 2020

Front. Bioeng. Biotechnol.

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Closing water loops in chemical industries result in hot and highly saline residual streams, often characterized by high strength and the presence of refractory or toxic compounds. These streams are attractive for anaerobic technologies, provided the chemical compounds are biodegradable. However, under such harsh conditions, effective biomass immobilization is difficult, limiting the use of the commonly applied sludge bed reactors. In this study, we assessed the long-term phenol conversion capacity of a lab-scale anaerobic membrane bioreactor (AnMBR) operated at 55 • C, and high salinity (18 gNa +. L −1). Over 388 days, bioreactor performance and microbial community dynamics were monitored using specific methanogenic activity (SMA) assays, phenol conversion rate assays, volatile fatty acids permeate characterization and Illumina MiSeq analysis of 16S rRNA gene sequences. Phenol accumulation to concentrations exceeding 600 mgPh. L −1 in the reactor significantly reduced methanogenesis at different phases of operation, while applying a phenol volumetric loading rate of 0.12 gPh. L −1. d −1. Stable AnMBR reactor performance could be attained by applying a sludge phenol loading rate of about 20 mgPh. gVSS −1. d −1. In situ maximum phenol conversion rates of 21.3 mgPh. gVSS −1. d −1 were achieved, whereas conversion rates of 32.8 mgPh. gVSS −1. d −1 were assessed in ex situ batch tests at the end of the operation. The absence of caproate as intermediate inferred that the phenol conversion pathway likely occurred via carboxylation to benzoate. Strikingly, the hydrogenotrophic SMA of 0.34 gCOD-CH 4. gVSS −1. d −1 of the AnMBR biomass significantly exceeded the acetotrophic SMA, which only reached 0.15 gCOD-CH 4. gVSS −1. d −1. Our results indicated that during the course of the experiment, acetate conversion gradually changed from acetoclastic methanogenesis to acetate oxidation coupled to hydrogenotrophic methanogenesis. Correspondingly, hydrogenotrophic methanogens of the class Methanomicrobia, together with Synergistia, Thermotogae, and Clostridia classes, dominated the microbial community and were enriched during the three phases of operation, while the aceticlastic Methanosaeta species remarkably decreased. Our findings clearly showed that highly saline phenolic wastewaters could be satisfactorily

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Kinetic and thermodynamic effects of temperature on methanogenic degradation of acetate, propionate, butyrate and valerate

Cited by 67 publications

References 33 publications

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

Syntrophic propionate-oxidizing bacteria in methanogenic systems

Anaerobic Conversion of Saline Phenol-Containing Wastewater Under Thermophilic Conditions in a Membrane Bioreactor

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