Accelerated bio-methane production rate in thermophilic digestion of cardboard with appropriate biochar: Dose-response kinetic assays, hybrid synergistic mechanism, and microbial networks analysis

Li, Dunjie; Song, Liuying; Fang, Hongli; Li, Ping; Teng, Yue; Li, Yu-You; Liu, Rutao; Niu, Qigui

doi:10.1016/j.biortech.2019.121782

Cited by 62 publications

(18 citation statements)

References 36 publications

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“…Similar results were reported for cardboard digestion using biochar addition in which the abundance of Methanobacterium was found to decrease upon biochar amendment (D. Li et al, 2019a). The digester was instead conspicuously enriched with acetoclastic Methanosaeta.…”

Section: Effect Of Modifications In Biochar Properties On Microbial Degradation Of Vfa During Adsupporting

confidence: 84%

“…Furthermore, Syntrophorhadbus and Syntrophobacter have also been reported to be increased in abundance and these could degrade propionate to acetate, thereby promoting VFA oxidation upon biochar addition. In fact, the ratio of propionate to VFA was found to be between 0 and 0.07 in digesters enriched with these bacteria (D. Li et al, 2019a). Additionally, the relative abundances of Pseudomonas and Pseudoxanthomonas which are known exoelectrogens and play important roles in organic matter degradation and electron transfer was also reported to increase with biochar amendment.…”

Section: Effect Of Modifications In Biochar Properties On Microbial Degradation Of Vfa During Admentioning

confidence: 97%

“…It has been suggested that biochar facilitates interspecies electron transfer via a conduction-based mechanism, i.e., the electron flow from electron donating cells through biochar to electron accepting cells (Chen et al, 2014). This bulk conductivity of biochar has also been cited as one of the phenomena causing a direct and quicker transfer of electrons to methanogens, thereby leading to increased efficiency of methanogenesis (KAUR et al, 2020;D. Li et al, 2019a).…”

Section: Modifications Of Molecular Structure Of Biochar and Their Impact On Microbial Interactions For Improved Ad Performancementioning

confidence: 99%

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Syntrophic interactions in anaerobic digestion: how biochar properties affect them?

Johnravindar

Patria

Lee

et al. 2021

Sustainable Environment

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Biochar as a biomass derived, low cost, carbon conductive material is considered as an important supplement in the anaerobic digestion (AD) of organic matter. It functions as an electrical grid to allow direct electron transfer from fatty acid oxidizers to methanogenic archaea, thereby promoting syntophy between various microbial groups and leading to efficient methanogenesis. Specific properties of biochar play an important role in promoting syntrophic interactions in AD. As a physical indicator, surface area, porosity, particle size and surface texture of biochar play an important role in governing microbial attachment and enrichment on biochar. This influences the microbial degradation of fatty acids and their subsequent conversion to methane by methanogens. Chemical properties such as the presence of hydrophobic functional groups, molecular nature and redox active groups on biochar surface promote interaction between biochar and microorganisms and provide an increased degree of electron transfer between the attached microorganisms. The above characteristics depend on feedstock and pyrolysis conditions used for biochar production. Unlike previous reviews, herein the desired physical and chemical properties of biochar that promote syntrophy in AD and the factors that influence them have been discussed in detail. Furthermore, engineering of biochar properties by various activation methods to harness favourable characteristics of biochar as an effective AD additive is described. Such a comprehensive account would be useful for engineering efficient biochar-mediated digestions with enhanced syntrophy and overall AD performance.

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Section: Effect Of Modifications In Biochar Properties On Microbial Degradation Of Vfa During Adsupporting

confidence: 84%

Section: Effect Of Modifications In Biochar Properties On Microbial Degradation Of Vfa During Admentioning

confidence: 97%

Section: Modifications Of Molecular Structure Of Biochar and Their Impact On Microbial Interactions For Improved Ad Performancementioning

confidence: 99%

See 1 more Smart Citation

Syntrophic interactions in anaerobic digestion: how biochar properties affect them?

Johnravindar

Patria

Lee

et al. 2021

Sustainable Environment

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“…Figure 2 showed that the characteristics of DOM in effluents of different phases. The five peaks were all found in the Phase Ⅰ with the high intensity, but the peak C, peak D and peak E belonged to humic substances [6]. It is indicated that the severe humification was occurred and the system of reactor was unstable.…”

Section: Dom Characteristics Of Effluent In Different Phasesmentioning

confidence: 94%

“…The emission wavelengths from 200 to 550 nm at 5nm increments and the excitation wavelengths from 200 to 500 nm at 5nm increments were set. Milli-Q water was used as reference to eliminate the inner filter effect [6].…”

Section: Eem Analysismentioning

confidence: 99%

Stress-Responses of Performance and Microbial Community in Anaerobic Digestion System Under Long-Term Enrichment of Phenanthrene

Shi

et al. 2021

Advances in Transdisciplinary Engineering

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The expanded granular sludge blanket reactor (EGSB) was operated for 198 days to study the long-term effects of phenanthrene (PHE) enrichment on system performance and microbial community. The results showed that the PHE was significantly enriched in the reactor. The final PHE concentration in effluent and sludge reached to 1.764±0.05 mg/L and 12.52±0.42 mg/gTS, respectively. While the average daily methane production was decreased by 5.0%-9.8% under long-term PHE exposure. The 3D-EEM of effluent indicated that PHE stimulated the microbial metabolism with the higher intensity of soluble microbial byproduct-like materials (SMP) and proteins. Moreover, the removal efficiency of soluble chemical oxygen demand (SCOD) and NH4+-N gradually diminished with the enrichment of PHE. PHE shaped the microbial community, and the predominant fermentative bacteria (Mesotoga) was severely inhibited. Contrarily, the bacteria (Syntrophorhabdus, Acinetobacter, Desulfovibrio, Desulfomicrobium) involved in PHE-degradation was enriched at end of Phase V. In addition, the relative abundance (RA) of hydrotrophic methanogens (Methanofastidiosum, Methanolinea, Methanobacterium, Methanomassiliicoccus) increased by 0.96-fold with the long-term enrichment of PHE, while the RA of acetoclastic Methanosaeta obviously decreased.

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Effects of biochar on anaerobic digestion: a review

Devi,

Eskicioglu

2024

Environ Chem Lett

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Accelerated bio-methane production rate in thermophilic digestion of cardboard with appropriate biochar: Dose-response kinetic assays, hybrid synergistic mechanism, and microbial networks analysis

Cited by 62 publications

References 36 publications

Syntrophic interactions in anaerobic digestion: how biochar properties affect them?

Syntrophic interactions in anaerobic digestion: how biochar properties affect them?

Stress-Responses of Performance and Microbial Community in Anaerobic Digestion System Under Long-Term Enrichment of Phenanthrene

Effects of biochar on anaerobic digestion: a review

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