Effect of air mixing on high-solids anaerobic digestion of cow manure: Performance and mechanism

Li, Xinwei; Deng, Liangwei; Li, Fucheng; Zheng, Dan; Yang, Hongnan

doi:10.1016/j.biortech.2022.128545

Cited by 9 publications

(2 citation statements)

References 20 publications

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“…Their frequent occurrence at this temperature in the present study was associated with a simultaneous shift among methanogens, where acetoclastic methanogenesis was replaced by hydrogenotrophic methanogenesis. Since both families have been frequently found in mesophilic AD systems [63,66] and no strong temperature-specificity is expected, it can be assumed that their occurrence at 43 • C (and also at 47 and 53 • C) was mainly driven by their syntrophic association with methanogens rather than by the process temperature. This will be discussed in more detail later in the discussion of Archaea.…”

Section: Bacterial Taxonomymentioning

confidence: 99%

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Steiniger,

Hupfauf,

Insam

et al. 2023

Fermentation

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Digesters at water resource recovery facilities (WRRFs) operating at different temperatures within the mesophilic and thermophilic temperature range is a flexibilization concept to contribute to heat management. Four 25 L digesters were fed with sewage sludge from a municipal WRRF and were operated at 37, 43, 47 and 53 °C, respectively, to describe changes in the overall process performance and the microbiota. Specific methane yield and COD degradation rates were the highest at 47 °C, only being up to 7% higher compared with at 37 °C. The increase in pH and concentrations of NH4-N and PO4-P above 43 °C were statistically significant. The effect on the microbial community was strong, indicating both a constant specialization towards thermophilic organisms as well as a change from acetoclastic to hydrogenotrophic/methylotrophic methanogenesis. The influence of temperature on process-engineering and physicochemical aspects was rather small compared with the changes in the microbiota.

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Section: Bacterial Taxonomymentioning

confidence: 99%

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Steiniger,

Hupfauf,

Insam

et al. 2023

Fermentation

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show abstract

“…OTU03 and Synergistaceae sp. OTU06 in the same period, are likely due to the competition for the same substrate, since both families are known for the efficient utilization of sugars and proteins [37,38]. Competitive effects are among the most important microbial interactions and have a very important role in shaping the anaerobic digestion systems [4,30].…”

Section: Dynamics Of Microbial Populationsmentioning

confidence: 99%

Monitoring the Microbiomes of Agricultural and Food Waste Treating Biogas Plants over a One-Year Period

Agostini,

Moriconi,

Zampirolli

et al. 2023

Applied Sciences

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The knowledge of the microbiome in the anaerobic digestion (AD) is critical for stabilizing the process and optimizing the biogas yield. This work investigates the microbial ecology in four full-scale biogas plants with different feedstocks and process parameters. The three agricultural plants sharing similar feedstocks’ composition (mostly rich in proteins, cellulose and hemicellulose), have several hydrolytic and methanogenic species in common, suggesting that their substrates specifically shape the microbiomes. Particularly, the hydrolytic and likely syntrophic Defluviitoga tunisiensis was detected as the most abundant species in one reactor, representing 21.2% of the community. On the other hand, the biogas plant treating the organic fraction of municipal solid waste (OFMSW), whose composition was much higher in hash and lower in proteins, displayed a quite different microbiome with a much lower abundance of Bacteroidales sp. much higher of Clostridiaceae. Moreover, this AD was clearly influenced by COVID-19 restrictions as both substrate availability and composition suddenly changed causing the wash-out of most bacterial and methanogenic species and leading to a deep modification of the microbial structure. The abundance of Methanosarcina flavescens greatly increased up to 36.5% of the total operational taxonomic units (OTUs), suggesting a switch from the hydrogenotrophic to the acetoclastic methanogenic pathway. This is the first report on the COVID-19 impact on the AD microbiome of a full-scale anaerobic digestor. Moreover, this paper demonstrated that the feedstock composition can differentially shape both bacterial and archaeal strains of the AD process.

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Enhancing High Solid Anaerobic Digestion of Kitchen Waste with Red Mud Addition: Performance and Microbial Community

Hu,

Wei,

Wang

et al. 2023

Water Air Soil Pollut

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Effect of air mixing on high-solids anaerobic digestion of cow manure: Performance and mechanism

Cited by 9 publications

References 20 publications

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Monitoring the Microbiomes of Agricultural and Food Waste Treating Biogas Plants over a One-Year Period

Enhancing High Solid Anaerobic Digestion of Kitchen Waste with Red Mud Addition: Performance and Microbial Community

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