Influence of key operational parameters on biohydrogen production from fruit and vegetable waste via lactate-driven dark fermentation

Martínez-Mendoza, Leonardo J.; Lebrero, Raquel; Muñoz, Raúl; García‐Depraect, Octavio

doi:10.1016/j.biortech.2022.128070

Cited by 41 publications

(16 citation statements)

References 37 publications

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“…Since no modifications of HRT and OLR conditions were applied in the hydrogenogenic fermenter, a suitable explanation for the observed profile of organic acids in Phase V is the catalytic effect of high doses of Fe2O3 NPs, resulting in the highest steady-state VHPR (as mentioned in Section 3.2.1). Concomitant lactate consumption and butyrate accumulation has already been suggested to play a key role in the improvement of VHPR in LD-DF assays [9,45]. In a study performed in batch mode using real CW as a substrate, Aranda-Jaramillo et al ( 2023) observed an accumulation of butyrate at the end of the fermentation, which was directly related to the associated VHPR and explained by a theoretical H 2 production dictated by the conversion of lactate (1 mol) and acetate (0.4 mol) to butyrate (0.7 mol), CO 2 (1 mol), and H 2 (0.6 mol) [9].…”

Section: Evolution Of Intermediate Metabolitesmentioning

confidence: 99%

Enhancing Biohydrogen Production: The Role of Iron-Based Nanoparticles in Continuous Lactate-Driven Dark Fermentation of Powdered Cheese Whey

Leroy-Freitas,

Muñoz,

Martínez-Mendoza

et al. 2024

Fermentation

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Here, a comprehensive investigation was conducted under various operational strategies aimed at enhancing biohydrogen production via dark fermentation, with a specific focus on the lactate metabolic pathway, using powdered cheese whey as a substrate. Initially, a batch configuration was tested to determine both the maximum hydrogen yield (100.2 ± 4.2 NmL H2/g CODfed) and the substrate (total carbohydrates) consumption efficiency (94.4 ± 0.8%). Subsequently, a transition to continuous operation was made by testing five different operational phases: control (I), incorporation of an inert support medium for biomass fixation (II), addition of carbon-coated, zero-valent iron nanoparticles (CC-nZVI NPs) at 100 mg/L (III), and supplementation of Fe2O3 nanoparticles at concentrations of 100 mg/L (IV) and 300 mg/L (V). The results emphasized the critical role of the support medium in stabilizing the continuous system. On the other hand, a remarkable increase of 10% in hydrogen productivity was observed with the addition of Fe2O3 NPs (300 mg/L). The analysis of the organic acids’ composition unveiled a positive correlation between high butyrate concentrations and improved volumetric hydrogen production rates (25 L H2/L-d). Moreover, the presence of iron-based NPs effectively regulated the lactate concentration, maintaining it at low levels. Further exploration of the bacterial community dynamics revealed a mutually beneficial interaction between lactic acid bacteria (LAB) and hydrogen-producing bacteria (HPB) throughout the experimental process, with Prevotella, Clostridium, and Lactobacillus emerging as the predominant genera. In conclusion, this study highlighted the promising potential of nanoparticle addition as a tool for boosting biohydrogen productivity via lactate-driven dark fermentation.

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Section: Evolution Of Intermediate Metabolitesmentioning

confidence: 99%

Enhancing Biohydrogen Production: The Role of Iron-Based Nanoparticles in Continuous Lactate-Driven Dark Fermentation of Powdered Cheese Whey

Leroy-Freitas,

Muñoz,

Martínez-Mendoza

et al. 2024

Fermentation

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“…The pH setpoint values were adjusted according to the neutral standard, with a pH of 6.5 to 8.5 [10]. If the pH of the pool water exceeds 8.5, the pump will pump the pH Down fertilizer liquid in the form of Potassium Hydroxide.…”

Section: Hardware and Software Integrationmentioning

confidence: 99%

Design and Control System of Acidity Degree and Dissolved Oxygen Levels in Aquaponic Systems

Aisyah,

Rofilia

2023

Advances in Physics Research

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The inhibiting factors for plant and fish growth in aquaponics systems are farmers who never control and monitor the quality of Dissolved Oxygen (DO) levels and the degree of acidity/Power of Hydrogen (pH) of water properly. Uncontrolled and monitoring of the quality of pH and DO in water properly and periodically will have an impact on the process of nitrification and denitrification of the aquaponics system. Therefore, it is necessary to update the technology on the aquaponic to automatically maintain the DO and pH parameter to balance the ecosystem. To design a control system, a series of validations are carried out on the sensors used. The MSP340 pH sensor has an average error of 2.58% and an accuracy of 97.42%. The DO sensor SEN0237-A has an average error of 4.82% and an accuracy of 95.18%. The ultrasonic sensor has an average error of 3.14% and an accuracy of 96.86%. Based on the comparison of parameter values before and after the control system was installed, the pH value was still in the neutral pH range (6.5-8.5). While the DO value tends to be below the predetermined setpoint (1-5 mg/l). Based on the comparison of growth rates, it was found that the average plant growth rate decreased from 13.4% to 12.5% during the two weeks of the study. However, the length of the plant increases to 0.2 cm. The fish growth rate increased in the first week using a control system up to 17%, survival rate reached 100% in the second week .

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“…TS content was adjusted using tap water. Both the operational pH values and the initial TS contents were chosen based on previous results [17]. All experimental conditions were conducted in duplicate.…”

Section: Experimental Set-up and Evaluation Of Operational Conditions...mentioning

confidence: 99%

“…Thus, the major advantage of the LD-DF process relies on the fact that lactate produced by lactic bacteria is harnessed to produce hydrogen, otherwise it would be accumulated in the fermentation broth and in turn result in low hydrogen productions. Several recent studies have endorsed the importance of the LD-DF process to increase the recovery of hydrogen from a number of feedstocks [17][18][19][20][21][22][23]. Besides making the process more cost-effective and less complex since it enables to avoid pretreatments aimed to kill LAB, the LD-DF may bring about some desirable bioactivities such as pH regulation (due to the production and consumption of lactate), substrate hydrolysis, biomass retention, oxygen depletion and substrate detoxification [10].…”

Section: Introductionmentioning

confidence: 99%

“…Despite these latent process advantages, studies are lacking to support LD-DF as a viable option to produce hydrogen from FW. Furthermore, although the impact of some key process parameters such as pH and total solids (TS) content on the DF process performance have been extensively studied [24], there is still limited knowledge about their effect on the LD-DF process of FW [17]. This study aimed at evaluating the production of renewable hydrogen with the concomitant formation of organic acids, including MCCAs, from FW through the LD-DF process.…”

Section: Introductionmentioning

confidence: 99%

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Elucidating the Role of Ph and Total Solids Content in the Co-Production of Biohydrogen and Carboxylic Acids from Food Waste Via Lactate-Driven Dark Fermentation

Regueira-Marcos¹,

García‐Depraect

Muñoz

2022

SSRN Journal

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Influence of key operational parameters on biohydrogen production from fruit and vegetable waste via lactate-driven dark fermentation

Cited by 41 publications

References 37 publications

Enhancing Biohydrogen Production: The Role of Iron-Based Nanoparticles in Continuous Lactate-Driven Dark Fermentation of Powdered Cheese Whey

Enhancing Biohydrogen Production: The Role of Iron-Based Nanoparticles in Continuous Lactate-Driven Dark Fermentation of Powdered Cheese Whey

Design and Control System of Acidity Degree and Dissolved Oxygen Levels in Aquaponic Systems

Elucidating the Role of Ph and Total Solids Content in the Co-Production of Biohydrogen and Carboxylic Acids from Food Waste Via Lactate-Driven Dark Fermentation

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