Performance of thermophilic anaerobic digesters using inoculum mixes with enhanced methanogenic diversity

Ghanimeh, Sophia; El‐Fadel, Mutasem; Saikaly, Pascal E.

doi:10.1002/jctb.5341

Cited by 5 publications

(2 citation statements)

References 40 publications

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“…The addition of the four bacterial strains and their mixture to the biogas digesters enhanced the methane yield by 10-11%, but it was not as efficient as the original communities, indicating the significant contribution by the members of the enriched communities present in low abundance. Therefore, mixing inocula from different sources can be selected as another strategy to promote a diverse and robust microbial consortium in TAD with enhanced buffering capacity and lower propionate accumulation [48,98] (Figure 2).…”

Section: Strategies To Enhance the Efficiency Of Tad 61 Development O...mentioning

confidence: 99%

Thermophilic Anaerobic Digestion: An Advancement towards Enhanced Biogas Production from Lignocellulosic Biomass

et al. 2023

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Thermophilic anaerobic digestion (TAD) technology has been adopted worldwide mainly due to it being a pathogen-free process in addition to the enhanced biogas yield and short hydraulic retention time (HRT). Taking the high metabolic rate of the thermophilic microbial community with highly efficient enzymatic systems into consideration, thermophiles are being widely explored as efficient inocula for lignocellulosic biomass (LCB) degradation and improved biomethane production. The advantages of TAD over mesophilic anaerobic digestion (MAD), including improved kinetics, efficient degradation of organic matter, and economic and environmental sustainability, make it one of the best strategies to be operated at moderately high temperatures. This review sheds light on the relevant role of thermophilic microorganisms as inocula in the anaerobic digestion of organic matter and factors affecting the overall process stability at high temperatures. Further, the discussion explains the strategies for enhancing the efficiency of thermophilic anaerobic digestion.

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Section: Strategies To Enhance the Efficiency Of Tad 61 Development O...mentioning

confidence: 99%

Thermophilic Anaerobic Digestion: An Advancement towards Enhanced Biogas Production from Lignocellulosic Biomass

et al. 2023

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“…The development of resilient microbiomes that can be acclimatized under thermophilic temperatures and resist the inhibitory concentrations by adjusting the substrate: inoculum ratio is one of the conventional pretreatments. Ghanimeh et al indicated that by inoculating (digestate, manure, and activated sludge) thermophilic anaerobic digesters during the loading period, the pH decreased to 7.2 and gradually increased to stabilize at 7.8, confirming the acclimation of microbial flora [78]. Elsewhere, the co-digestion of different substrates has also been reported as a conventional pretreatment method, which can be implemented without any major modification in the system.…”

Section: Effect Of Pretreatment Techniques In the Ad Systemmentioning

confidence: 99%

Recovery of Household Waste by Generation of Biogas as Energy and Compost as Bio-Fertilizer—A Review

et al. 2021

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Nowadays, organic waste and especially household waste represents a significant global issue due to population growth. The anaerobic digestion (AD) process is an essential operation contributing powerfully to the valorization of organic waste including food waste in terms of renewable energy generation (biogas) and the rich-nutrient residue that can be utilized as bio-fertilizer. Thus, this process (AD) allows for good recovery of household waste by generating biogas and compost. However, the AD operation has been affected by several key factors. In this paper, we aim to involve different critical parameters influencing the AD process, including temperature, pH, organic loading rate (OLR), carbon to nitrogen ratio (C/N), and total solid content (TS(%)). Further, the paper highlights the inhibition caused by the excessive accumulation of volatile fatty acids (VFAs) and ammoniac, which exhibits the positive effects of co-digestion, pretreatment methods, and mixing techniques for maintaining process stability and enhancing biogas production. We analyze some current mathematical models explored in the literature, such as distinct generic, non-structural, combined, and kinetic first-order models. Finally, the study discusses challenges, provides some possible solutions, and a future perspective that promises to be a highly useful resource for researchers working in the field of household waste recovery for the generation of biogas.

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Higher bacterial diversity in two-phase thermophilic anaerobic digestion of food waste after micronutrient supplementation

Menon

Lyng

Giannis

2021

Biomass Conv. Bioref.

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Performance of thermophilic anaerobic digesters using inoculum mixes with enhanced methanogenic diversity

Cited by 5 publications

References 40 publications

Thermophilic Anaerobic Digestion: An Advancement towards Enhanced Biogas Production from Lignocellulosic Biomass

Thermophilic Anaerobic Digestion: An Advancement towards Enhanced Biogas Production from Lignocellulosic Biomass

Recovery of Household Waste by Generation of Biogas as Energy and Compost as Bio-Fertilizer—A Review

Higher bacterial diversity in two-phase thermophilic anaerobic digestion of food waste after micronutrient supplementation

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