Adding carbon-based materials on anaerobic digestion performance: A mini-review

Lu, Jia Shun; Chang, Jo‐Shu; Lee, Dong Hoon

doi:10.1016/j.biortech.2019.122696

Cited by 50 publications

(10 citation statements)

References 92 publications

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“…Recently, the supplementation of carbon-based additives (e.g., biochar, activated carbon, graphite, etc.) has been widely explored in the literature to improve the AD of many substrates [14][15][16]. Among them, biochar (BC) is considered a low-cost and eco-friendly sorbent material.…”

Section: Introductionmentioning

confidence: 99%

Addition of Different Biochars as Catalysts during the Mesophilic Anaerobic Digestion of Mixed Wastewater Sludge

et al. 2021

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Biochar (BC) recently gained attention as an additive for anaerobic digestion (AD). This work aims at a critical analysis of the effect of six BCs, with different physical and chemical properties, on the AD of mixed wastewater sludge at 37 °C, comparing their influence on methane production and AD kinetics. AD batch tests were performed at the laboratory scale operating 48 reactors (0.25 L working volume) for 28 days with the addition of 10 g L−1 of BC. Most reactors supplemented with BCs exhibited higher (up to 22%) methane yields than the control reactors (0.15 Nm3 kgVS−1). The modified Gompertz model provided maximum methane production rate values, and in all reactors the lag-phase was equal to zero days, indicating a good adaptation of the inoculum to the substrate. The potential correlations between BCs’ properties and AD performance were assessed using principal component analysis (PCA). The PCA results showed a reasonable correlation between methane production and the BCs’ O–C and H–C molar ratios, and volatile matter, and between biogas production and BCs’ pore volume, specific surface area, and fixed and total carbon. In conclusion, the physic-chemical properties of BC (specifically, hydrophobicity and morphology) showed a key role in improving the AD of mixed wastewater sludge.

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Section: Introductionmentioning

confidence: 99%

Addition of Different Biochars as Catalysts during the Mesophilic Anaerobic Digestion of Mixed Wastewater Sludge

et al. 2021

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“…The used biochars should not be regenerated and re-used. The used biochars could be discharged as part of the effluent that enters the next handling units, such as anaerobic digester [27] as electron conductors for DIET between different groups of bacteria or wastewater treatment reactor [28] as biofilm carriers with retained biomass. The biochars discharged with the final waste biomass can function as settling enhancer for biomass sedimentation [29], bulking agents for composting [30], or simply part of fertilizers to land applications [31].…”

Section: Application Prospectsmentioning

confidence: 99%

Glucose fermentation with biochar-amended consortium: microbial consortium shift

Chen

Huang

et al. 2020

Bioengineered

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The effects of adding biochar rice husk (R), white popinee (WP), bamboo (BB), or coconut (CT) on microbial community in fermentation broths from glucose were investigated. The added biochars acted as biofilm carriers on which Sporolactobacillus spathodeae, Clostridium sensu stricto 11 sp., Clostridium sensu stricto 12 sp., Clostridium sensu stricto 1 sp., and Clostridium sensu stricto 5 sp. were enriched. Fermentation reactions substantially increased the amounts of acid-producers in biofilm. The homoacetogens, Clostridium carboxidivorans and Clostridium drakei, were identified in the biofilm in the first two batches of fermentation with biochars as electron conductors between acid-producers and homoacetogens to assist homoacetogenesis. The heterotrophic bacteria overcompeted the acid-producers in the biofilm in long-term fermentation. ARTICLE HISTORY

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“…Conductive materials (CMs) are wildly used to increase methane production in the AD process, mainly focusing on carbon materials and nanowires was proposed [31,34,35]. However, some evidence supporting the above mechanism is indirect proof [36].…”

Section: Introductionmentioning

confidence: 99%