Strategies to control pH in the dark fermentation of sugarcane vinasse: Impacts on sulfate reduction, biohydrogen production and metabolite distribution

Rogeri, Renan Coghi; Fuess, Lucas Tadeu; Eng, Felipe; Borges, André do Vale; Araujo, Matheus Neves; Damianovic, Márcia Helena Rissato Zamariolli; Silva, Ariovaldo José da

doi:10.1016/j.jenvman.2022.116495

Cited by 31 publications

(9 citation statements)

References 69 publications

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“…In the case of CR, the total consumption of HLa (550 mg-COD L −1 ) accumulated during Phase II occurred in association with a decrease in HAc (357 mg-COD L −1 ) and an increase in HBu (400 mg-COD L −1 ) concentrations, suggesting the establishment of the cofermentation of HLa and HAc as a relevant HBu-producing pathway [38]. The cofermentation of HLa and HAc, also referred to as the reverse β-oxidation of acetate using lactate as a complementary carbon source, is commonly reported in several fermentative systems, playing a key role in biohydrogen production from melanoidin-containing wastewaters, namely, sugarcane molasses [19,20], and vinasse [22,24]. On the other hand, increasing HLa concentrations (in association with slight increases in HAc levels) were observed in melanoidin-containing conditions, namely 100 mg-COD L −1 (G/M = 0.50), 140 mg-COD L −1 (G/M = 1.50), 75 mg-COD L −1 (G/M = 1.62), and 1355 mg-COD L −1 (G/M = 5.00), while a decrease in HAc concentration (300 mg-COD L −1 ) was observed in G/M = 1.67.…”

Section: Distribution Of Soluble Phase Metabolitesmentioning

confidence: 99%

“…Recent investigations show the relevance of using melanoidin-containing substrates, such as sugarcane molasses [19][20][21] and sugarcane vinasse [22][23][24], in fermentative processes toward the recovery of value-added products such as biohydrogen and VFA. However, focus is always given to the impacts of primary fermentable compounds (e.g., sugars and glycerol) on process performance, which limits understanding of how negatively (or positively) the presence of melanoidins may impact the fermentative activity.…”

Section: Introductionmentioning

confidence: 99%

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Melanoidin Content Determines the Primary Pathways in Glucose Dark Fermentation: A Preliminary Assessment of Kinetic and Microbial Aspects

Comparato,

de Araujo,

Sakamoto

et al. 2024

Fermentation

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Melanoidins are heterogeneous polymers with a high molecular weight and brown color formed during the Maillard reaction by the combination of sugars and amino acids at high temperatures with the potential to inhibit the microbial activity in bioprocesses. This study assessed the impacts of melanoidins on the kinetic of substrate conversion and production of organic acids via dark fermentation using microbial consortia as inoculum. The investigations were carried out in fed-batch reactors using synthetic melanoidins following glucose-to-melanoidin ratios (G/M; g-glucose g−1 melanoidins) of 0.50, 1.50, 1.62, 1.67, and 5.00, also considering a melanoidin-free control reactor. The results showed that melanoidins negatively impacted the kinetics of glucose fermentation by decreasing the first-order decay constant (k1): when dosing equivalent initial concentrations of glucose (ca. 3 g L−1), the absence of melanoidins led to a k1 of 0.62 d−1, whilst dosing 2 g L−1 (G/M = 1.5) and 6.0 g L−1 (G/M = 0.5) of melanoidins produced k1 values of 0.37 d−1 and 0.27 d−1, respectively. The production of butyric and acetic acids was also negatively impacted by melanoidins, whilst the lactic activity was not impaired by the presence of these compounds. Lactate production reached ca. 1000 mg L−1 in G/M = 1.67, whilst no lactate was detected in the control reactor. The presence of melanoidins was demonstrated to be a selective metabolic driver, decreasing the microbial diversity compared to the control reactor and favoring the growth of Lactobacillus. These results highlight the importance of further understanding the impacts of melanoidins on melanoidin-rich organic wastewater bioconversion, such as sugarcane vinasse, which are abundantly available in biorefineries.

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Section: Distribution Of Soluble Phase Metabolitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Melanoidin Content Determines the Primary Pathways in Glucose Dark Fermentation: A Preliminary Assessment of Kinetic and Microbial Aspects

Comparato,

de Araujo,

Sakamoto

et al. 2024

Fermentation

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“…The parallel generation of stillage and recalcitrant substances with high COD values should be also considered. Therefore, efficient approaches to wastewater management must be included 60,61 …”

Section: Fermentative Processesmentioning

confidence: 99%

“…Therefore, efficient approaches to wastewater management must be included. 60,61 Processes such as hydrolysis of cellulose allow sugars to be obtained from fermentable plant material, with applicability to obtain biofuel (ethanol and methane). 62 Mena 63 used Musa spp.…”

Section: Production Of Ethanolmentioning

confidence: 99%

Exploiting waste derived from Musa spp. processing: Banana and plantain

Jiménez

López

Santos

et al. 2023

Biofuels Bioprod Bioref

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Banana and plantain (Musa spp.) are among the most popular crops especially in tropical and sub-tropical zones. Musa spp. is a unique, perennial, single-harvest plant that after fruit harvesting is decapitated and generates large amounts of waste and by-products: leaves and pseudostem. Fruit processing also generates waste peels and discarded pieces. Recent research has demonstrated that this type of organic substrate represents a potentially valuable resource that can be developed into high-value products. These developments are critically reviewed in this article, which includes a summary of the composition and biocompounds contained in pseudostem and peel, the use of Musa spp. waste in animal and human feed and the obtention of fiber to make paper, rope, handcrafts and combustion materials. On the other hand, the potential for polysaccharides to be fermented and transformed into ethanol, methane or hydrogen, the obtention of single-cell protein (microbial protein) and the use of solid residues for composting or as a substrate for mushrooms cultivation have also been evaluated. The applications described represent great opportunities for economic benefits from this agro-industrial waste. A scheme for the integrated utilization of Musa spp. waste in a biorefinery approach is presented as well.

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“…TMP results in anaerobically-treated wastewater to produce biohydrogen in a process called dark fermentation (Figure 2) [85]. Dark fermentation is a temperature-sensitive process since a slight shift in temperature can significantly increase or decrease the hydrogen yield; hence, the temperature of wastewater has to be controlled efficiently [104]. A group of researchers used recirculated two-phased anaerobic digestion to produce biohydrogen and biomethane simultaneously from municipal solid waste, 50% of which was paper waste [105].…”

Section: Biohydrogen and Biogasmentioning

confidence: 99%

On the Conversion of Paper Waste and Rejects into High-Value Materials and Energy

et al. 2023

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The pulp and paper industry (PPI) is a major contributor to the global economy, but it also poses a challenge for waste disposal, as it generates large amounts of several waste streams. Among these, paper rejects are generated during the papermaking process and could account for up to 25% of the produced paper. Moreover, hundreds of millions of tons of paper are produced annually that end up in landfills if not burnt or recycled. Furthermore, the PPI significantly contributes to climate change and global warming in the form of deforestation and water and air pollution. Therefore, the impact of this industry on the sustainability of natural resources and its adverse environmental health effects requires special attention. This review focuses on discussing the sustainable routes to utilize paper waste and rejects from the PPI towards a circular economy. At first, it discusses the industry itself and its environmental impact, followed by the possible sustainable approaches that can be implemented to improve papermaking processes as well as waste management systems, including paper recycling. The literature indicates that paper recycling is crucial because, if appropriately designed, it significantly lowers greenhouse gas emissions, water and resources consumption, and manufacturing costs. However, several concerns have surfaced about the different chemicals that are used to improve recycling efficiency and recycled paper quality. Furthermore, paper recycling is limited to up to seven times. This review, therefore, goes on to highlight several sustainable waste management routes for paper waste utilization other than recycling by emphasizing the concept of converting paper waste and rejects into energy and high-value materials, including biofuels, biohydrogen, biomethane, heat, nanocellulose, hydrochar, construction materials, and soil amendments. Both the benefits and shortcomings of these waste management routes and their applications are discussed. It becomes clear from this review that sustainable management solutions for paper waste and rejects are implementable, but further research and development are still needed.

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Strategies to control pH in the dark fermentation of sugarcane vinasse: Impacts on sulfate reduction, biohydrogen production and metabolite distribution

Cited by 31 publications

References 69 publications

Melanoidin Content Determines the Primary Pathways in Glucose Dark Fermentation: A Preliminary Assessment of Kinetic and Microbial Aspects

Melanoidin Content Determines the Primary Pathways in Glucose Dark Fermentation: A Preliminary Assessment of Kinetic and Microbial Aspects

Exploiting waste derived from Musa spp. processing: Banana and plantain

On the Conversion of Paper Waste and Rejects into High-Value Materials and Energy

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