Co-digestion of biofuel by-products: Enhanced biofilm formation maintains high organic matter removal when methanogenesis fails

Borges, André do Vale; Fuess, Lucas Tadeu; Takeda, Paula Yumi; Alves, Inaê; Dias, Maria Eduarda Simões; Damianovic, Márcia Helena Rissato Zamariolli

doi:10.1016/j.jenvman.2022.114768

Cited by 12 publications

(2 citation statements)

References 46 publications

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“…CODs consumption, from methanogenesis towards cell synthesis. Similar results were observed in previous studies on the biodigestion of highly fermentable substrates, such as sugarcane juice and molasses (Fuess et al 2021c ; Vilela et al 2021 ) and glycerol-supplemented sugarcane vinasse (Borges et al 2022 ). In all cases, the impairment of the methanogenic activity was not impeditive for achieving relatively high substrate consumption levels, reinforcing the diversion towards cell synthesis.…”

Section: Resultssupporting

confidence: 90%

Methanogenic consortia from thermophilic molasses-fed structured-bed reactors: microbial characterization and responses to varying food-to-microorganism ratios

Fuess

Eng

Bovio-Winkler

et al. 2022

Braz. J. Chem. Eng.

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The heterogeneous character of fixed-film reactors may create highly specialized zones with a stratified distribution of microbial groups and varying capabilities to withstand high organic loads in anaerobic digestion (AD) systems. The microbial distribution and methane-producing potential of biomass from different regions (feeding zone and structured bed) of two second-stage thermophilic (55 ºC) fixed-film reactors were assessed. Three levels of food-to-microorganism (F/M) ratio (0.4, 1.0 and 3.0 g-COD g −1 VS) using fermented (two-stage AD) and fresh (single-stage AD) sugarcane molasses were tested in batch reactors, simulating low to high organic loads. Specific methane production rates increased as the F/M increased when using fermented molasses, maintaining efficient methanogenesis at substrate availability levels threefold higher than single-stage schemes (3.0 vs. 1.0 g-COD g −1 VS). Success in methane production derived from the homogenous establishment (similar in both feeding zone and bed) of syntrophic associations between acetogens ( Pelotomaculum , Syntrophothermus, Syntrophomonas and Thermodesulfovibrio ), acetate oxidizers ( Thermoacetogenium , Mesotoga and Pseudothermotoga ) and hydrogenotrophic methogens ( Methanothermobacter and Methanoculleus ) replacing acetoclastic methanogens ( Methanosaeta ). Phase separation under thermophilic conditions was demonstrated to boost methane production from sugar-rich substrates, because the process depends on microbial groups (hydrogenotrophs) that grow faster and are less susceptible to low pH values compared to acetotrophs. Supplementary Information The online version contains supplementary material available at 10.1007/s43153-022-00291-x.

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Section: Resultssupporting

confidence: 90%

Methanogenic consortia from thermophilic molasses-fed structured-bed reactors: microbial characterization and responses to varying food-to-microorganism ratios

Fuess

Eng

Bovio-Winkler

et al. 2022

Braz. J. Chem. Eng.

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“…Os estudos que realizaram co-digestão de vinhaça e glicerina apresentaram resultados notáveis (LOVATO et al, 2019a;BORGES et al, , 2022TAKEDA et al, 2022) e indicam que este procedimento é viável. Porém, a melhoria dos resultados obtidos depende de avaliação de co-digestão de vinhaça e glicerol em reatores de alta taxa, de avaliação de co-fermentação…”

Section: A Glicerina Como Cossubstrato Na Digestão Anaeróbiaunclassified

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

Menezes¹

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Solving the seasonality issue in sugarcane biorefineries: High-rate year-round methane production from fermented sulfate-free vinasse and molasses

Fuess,

Braga,

Zaiat

et al. 2023

Chemical Engineering Journal

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Co-digestion of biofuel by-products: Enhanced biofilm formation maintains high organic matter removal when methanogenesis fails

Cited by 12 publications

References 46 publications

Methanogenic consortia from thermophilic molasses-fed structured-bed reactors: microbial characterization and responses to varying food-to-microorganism ratios

Methanogenic consortia from thermophilic molasses-fed structured-bed reactors: microbial characterization and responses to varying food-to-microorganism ratios

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

Solving the seasonality issue in sugarcane biorefineries: High-rate year-round methane production from fermented sulfate-free vinasse and molasses

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