An alternative for value aggregation to the sugarcane chain: Biohydrogen and volatile fatty acids production from sugarcane molasses in mesophilic expanded granular sludge bed reactors

Freitas, Isabele Baima Ferreira; Menezes, Camila Aparecida de; Silva, Edson Luiz

doi:10.1016/j.fuel.2019.116419

Cited by 27 publications

(8 citation statements)

References 53 publications

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“…Isovaleric accumulation reported in the present study is in line with previous studies that reported signi cant amounts of isovaleric acid during sugarcane bagasse fermentation (Ribeiro et al, 2017). However, although valeric acid has been widely produced in anaerobic reactor treating lignocellulosic biomass (Baima et al, 2020), its pathway and role in fermentative process is still unclear and underexplored.…”

Section: Overall Performance Of the Innovative Bioreactor: Metabolite...supporting

confidence: 91%

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Biofuels production from solid and liquid fractions of hydrothermally pretreated sugarcane bagasse in a continuous compartmentalized reactor and potential metabolic pathways

Soares

Delforno

Oliveira

et al. 2023

Preprint

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Solid and liquid fractions of hydrothermally pretreated sugarcane bagasse (SCB) were simultaneously used as substrate of a novel continuous compartmentalized reactor. The effect of four (56, 42, 28, and 14 hours) hydraulic retention time (HRT) and chemical oxygen demand (COD) (0.5, 3.0, and 9.0 g/L) were evaluated on hydrogen (H2) and organic acids production. Higher H2 production and yield (686 mL and 1.63 mol/mol consumed carbohydrates, respectively) were obtained at HRT of 28 h, probably due to the Clostridium and Thermoanaerobacterium metabolisms, which accounted for almost 60% of the microbial relative abundance. Under lower and higher HRT (14 and 56 h, respectively) lactic acid predominated without hydrogen production. Other value-added chemical such as citric, valeric and caproic acids were also obtained as a function of HRT. From the functional point of view, enzymes from the glycoside hydrolases group (GHs) potentially performed important role in the lignocellulosic biomass bioconversion.

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Section: Overall Performance Of the Innovative Bioreactor: Metabolite...supporting

confidence: 91%

“…Baima et al (Baima et al, 2020) also reported an increase in homoacetogenesis pathway as a function of HRT reduction, from 23-51% (from HRT of 24h to 2h) and subsequent decrease of 45% in HRT of 1h, using sugarcane molasses in mesophilic expanded granular sludge bed reactors.…”

Section: Overall Performance Of the Innovative Bioreactor: Metabolite...mentioning

confidence: 91%

Biofuels production from solid and liquid fractions of hydrothermally pretreated sugarcane bagasse in a continuous compartmentalized reactor and potential metabolic pathways

Soares

Delforno

Oliveira

et al. 2023

Preprint

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“…Those high concentrations of lactate and acetate are suggestive of heterolactic fermentation, which would happen during the collection, handling, or even storage of the TV. Indeed, earlier reports have shown diverse feedstocks with high concentrations of lactate and acetate [47][48][49]. In the literature, the presence of LAB in DF is a cause of controversy due to its different effects on hydrogen production [10,50,51].…”

Section: Effect Of the Inoculum Type On The Metabolic Profilesmentioning

confidence: 99%

Dark Fermentation Process Response to the Use of Undiluted Tequila Vinasse without Nutrient Supplementation

et al. 2021

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The technical feasibility of valorizing tequila vinasse (TV), a wastewater with high pollution potential, through the production of biogenic hydrogen via dark fermentation, has long been proven in diverse lab-scale reactors that were operated either in batch or continuous mode. However, such systems have mainly been tested with diluted streams and nutrient supplementation, hindering the techno-economic attractiveness of the TV-to-hydrogen concept at large scale. In this study, the feasibility of producing hydrogen from high-strength undiluted TV with no added extra nutrients was evaluated under batch mesophilic conditions. Additionally, the use of two different acidogenic inocula obtained either by heat or heat-aeration pretreatment was investigated to get a greater understanding of the effect of inoculum type on the process. The results obtained showed that the TV utilized herein contained macro- and micro-nutrients high enough to support the hydrogenogenic activity of both cultures, entailing average hydrogen yields of 2.4–2.6 NL H2/L vinasse and maximum hydrogen production rates of 1.4–1.9 NL H2/L-d. Interestingly, the consumption of lactate and acetate with the concomitant production of butyrate was observed as the main hydrogen-producing route regardless of the inoculum, pointing out the relevance of the lactate-driven dark fermentative process. Clostridium beijerinckii was ascertained as key bacteria, but only in association with microorganisms belonging to the genera Enterobacter and Klebsiella, as revealed by phylogenetic analyses.

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“…In this regard, this study aimed at exploiting the "unwanted" lactate type fermentation to efficiently produce bioH 2 , while bringing forth practical and economical operational advantages. Hence, this study contributes to the scarce information regarding the continuous lactate-derived bioH 2 production which can be useful in other DF systems treating distillery wastewater (Couto et al, 2020;Fuess et al, 2018), molasses (Freitas et al, 2020;Oliveira et al, 2020), food waste (Noblecourt et al, 2018;Santiago et al, 2019), cheese whey (Asunis et al, 2019), winery effluents (Buitrón et al, 2020), and hydrolysates of lignocellulosic biomass (Muñoz-Páez et al, 2020), whose composition is suitable to undergo the lactate type fermentation.…”

Section: Implications Of This Work and Future Perspectivesmentioning

confidence: 99%

Three-stage process for tequila vinasse valorization through sequential lactate, biohydrogen and methane production

García‐Depraect

Muñoz

Lier

et al. 2020

Bioresource Technology

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This study evaluated a novel three-stage process devoted to the cascade production of lactate, biohydrogen and methane from tequila vinasse (TV), with emphasis on attaining a high and stable biohydrogen production rate (HPR) by utilizing lactate as biohydrogen precursor. In the first stage, tailored operating conditions applied to a sequencing batch reactor were effective in sustaining a lactate concentration of 12.4 g/L, corresponding to 89% of the total organic acids produced. In the second stage, the stimulation of lactate-centered dark fermentation which entails the decoupling of biohydrogen production from carbohydrates utilization was an effective approach enabling stable biohydrogen production, having HPR fluctuations less than 10% with a maximum HPR of 12.3 L/L-d and a biohydrogen yield of 3.1 L/L TV. Finally, 1.6 L CH 4 /L-d and 6.5 L CH 4 /L TV were obtained when feeding the biohydrogen fermentation effluent to a third methanogenic stage, yielding a global energy recovery of 267.5 kJ/L TV .

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An alternative for value aggregation to the sugarcane chain: Biohydrogen and volatile fatty acids production from sugarcane molasses in mesophilic expanded granular sludge bed reactors

Cited by 27 publications

References 53 publications

Biofuels production from solid and liquid fractions of hydrothermally pretreated sugarcane bagasse in a continuous compartmentalized reactor and potential metabolic pathways

Biofuels production from solid and liquid fractions of hydrothermally pretreated sugarcane bagasse in a continuous compartmentalized reactor and potential metabolic pathways

Dark Fermentation Process Response to the Use of Undiluted Tequila Vinasse without Nutrient Supplementation

Three-stage process for tequila vinasse valorization through sequential lactate, biohydrogen and methane production

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