Comparison of thermophilic and hyperthermophilic dark fermentation with subsequent mesophilic methanogenesis in expanded granular sludge bed reactors

Weide, Tobias; Peitzmeier, Jens; Wetter, Christof; Wichern, Marc; Brügging, Elmar

doi:10.1016/j.ijhydene.2020.11.156

Cited by 7 publications

(6 citation statements)

References 79 publications

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“…The hydrogen production rate of 1.84 H 2 /mol glucose and 1.63 H 2 /mol glucose showed the optimal performance. 20,26,27 In some studies, the rate of hydrogen production was only 1.31 H 2 /mol glucose. 28 These rates are obviously lower than the value of 3.68 mol of H 2 /mol of glucose observed in this study.…”

Section: Hydrogen Production Capacity and Biogas Compositionmentioning

confidence: 99%

Enhanced Thermophilic Hydrogen Production by an Enriched Novel Acetic-Acid-Type Fermentative Bacterium from Inoculum Sludge with Nonheat Pretreatment

Yin,

Wang,

Guo

et al. 2024

Energy Fuels

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Biological hydrogen production from renewable biomass based on anaerobic dark fermentation is an environmentally friendly process. However, the hydrogen production efficiency was not ideal and the start-up time was always long for dark fermentation systems, which limits the development of biohydrogen production. In this study, a novel mild preculture method which regulates substrate concentration without controlling pH was used to enhance hydrogen production efficiency and accelerate the start-up process under thermophilic conditions. We regulated the substrate concentration from 2000 to 8000 mg COD/L without controlling the pH and performed a nonheat pretreatment (>90 °C) of inoculum sludge at 55 °C using an SBR anaerobic reactor. The reaction process of hydrogen production was divided into eight stages according to different COD concentrations. The experimental results indicated that the reactor quickly became stable on the 12th day, while the maximum hydrogen yield of 3.68 mol of H 2 /mol of glucose was obtained in the fifth stage, with the optimal COD of 5500 mg/L, and the maximum COD removal efficiency of 39.61% was achieved in the fourth stage, with a COD of 5000 mg/L. Microorganism community structure analysis showed that Thermoanaerobacterium was the dominant species throughout the process of hydrogen production. In particular, a novel hydrogen-producing bacterium of acetic-acid-type fermentation, Thermoanaerobacterium thermosaccharolyticum strain CT72, was successfully enriched and exhibited excellent capacity for hydrogen production under thermophilic conditions.

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Section: Hydrogen Production Capacity and Biogas Compositionmentioning

confidence: 99%

Enhanced Thermophilic Hydrogen Production by an Enriched Novel Acetic-Acid-Type Fermentative Bacterium from Inoculum Sludge with Nonheat Pretreatment

Yin,

Wang,

Guo

et al. 2024

Energy Fuels

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“…However, hydrogen yield and production rates are often too low for industrial implementation, though operation of highrate reactors, use of a two-stage system of DF and subsequent methanogenic stage may significantly alleviate these issues. However, such techniques and configurations require further extensive research (Weide et al 2021).…”

Section: Valorisationmentioning

confidence: 99%

“…However, such techniques and configurations require further extensive research (Weide et al . 2021).…”

Section: Whey Valorisationmentioning

confidence: 99%

Recent advances in whey processing and valorisation: Technological and environmental perspectives

Buchanan

Martindale

Romeih

et al. 2023

Int J of Dairy Tech

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Whey has several environmental risks if disposed of as waste in watercourses. However, there are numerous valorisation techniques to convert it into valuable and highly nutritious products. Techniques such as membrane filtration may be utilised, but these are not applicable to all categories of whey. Novel methodologies that are agile enough to deal with whey variability can produce valorised products. This review assesses the capability of whey processing techniques, applications and methodologies, discussing pertinent research that can innovate product development further. It focuses on environmental impacts of whey as a waste and ways of minimising it.

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“…Isto porque a acidificação dos cossubstratos e possibilidade de remoção de sulfato em um reator anteriormente aos metanogênicos pode criar condições favoráveis para maximização da produtividade de metano. Dessa maneira, é necessário avaliar a digestão em dois estágios para diferentes combinações de temperatura (temperature-phased) (O-THONG et al, 2016;WEIDE et al, 2020;BERNAT et al, 2021;RAMOS et al, 2021;ROMERO-GÜIZA et al, 2021).…”

Section: Ralfs Metanogênicos Termofílico E Mesofílico De Segundo Estágiounclassified

“…Estes dados confirmam as afirmações de que as alterações de desempenho fermentativo do RALF-AT influenciam na produtividade de metano em segundo estágio. Isto é verdade pois as alterações mais significativas de desempenho ocorreram em reator operado constantemente em 25 °C, mesmo que a combinação (hiper) termofílicomesofílico seja associada à estabilidade operacional(WEIDE et al, 2020;ROMERO-GÜIZA et al, 2021).…”

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Co-digestão de vinhaça e glicerina em reatores anaeróbios de leito fluidificado

Menezes¹

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Comparison of thermophilic and hyperthermophilic dark fermentation with subsequent mesophilic methanogenesis in expanded granular sludge bed reactors

Cited by 7 publications

References 79 publications

Enhanced Thermophilic Hydrogen Production by an Enriched Novel Acetic-Acid-Type Fermentative Bacterium from Inoculum Sludge with Nonheat Pretreatment

Enhanced Thermophilic Hydrogen Production by an Enriched Novel Acetic-Acid-Type Fermentative Bacterium from Inoculum Sludge with Nonheat Pretreatment

Recent advances in whey processing and valorisation: Technological and environmental perspectives

Co-digestão de vinhaça e glicerina em reatores anaeróbios de leito fluidificado

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