Seed Pretreatment for Increased Hydrogen Production Using Mixed-Culture Systems with Advantages over Pure-Culture Systems

Pachapur, Vinayak Laxman; Kutty, Prianka; Pachapur, Preetika Kuknur; Brar, Satinder Kaur; Bihan, Yann Le; Galvez‐Cloutier, Rosa; Buelna, Gerardo

doi:10.3390/en12030530

Cited by 58 publications

(28 citation statements)

References 143 publications

(245 reference statements)

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“…pH was between 7.49 and 7.9 depending on the ratio of water to glycol ethylene. Fermentations were cultivated at 37 °C temperature applied in a biogas plant and glycerol fermentation (Pachapur et al 2019 ).…”

Section: Methodsmentioning

confidence: 99%

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Sołowski

Zimiński

Cenian

2021

Environ Sci Pollut Res

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Anaerobic digestion of aqueous glycol ethylene was tested. The process lasted two cycles of 7 days, but after the second cycle, high hydrogen production occurred shift to dark fermentation. The biogas production lasted 14 days, obtaining peak values of hydrogen, and then rapidly stopped. In investigations, the following were checked: dependence of hydrogen, methane and hydrogen sulphide in the process. Mixtures of water with glycol ethylene mass ratio from 0.6 to 0.85 were substrates in experiments. The highest methane production was for water ethylene 0.7 ratio 2.85 L of methane with a yield of 178 mL of methane/g VSS (volatile suspended solids) of glycol ethylene. The optimal ratio of water and glycol ethylene was 0.85 25.5 mL of hydrogen (giving yield 1.71 mL of hydrogen/g VSS of glycol ethylene) and 1.71 mL of hydrogen sulphide emission for a 0.6 ratio. Popular polymer industry wastes, glycol ethylene, can be utilised by anaerobic digestion.

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Section: Methodsmentioning

confidence: 99%

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Sołowski

Zimiński

Cenian

2021

Environ Sci Pollut Res

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“…CH-8708, Manedorf, Switzerland), for bio-CH 4 production with a working volume ratio of 1:10. Both bioreactors were inoculated with adequate microbial consortia for the optimized production of each biofuel [64], the tested substrate was the organic fraction of municipal solid waste (OFMSW), additional information can be found in [34,63].…”

Section: Two-stage Anaerobic Digestion (Tsad)mentioning

confidence: 99%

Energy Sustainability Analysis (ESA) of Energy-Producing Processes: A Case Study on Distributed H2 Production

Gómez-Camacho

Ruggeri

2019

Sustainability

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In the sustainability context, the performance of energy-producing technologies, using different energy sources, needs to be scored and compared. The selective criterion of a higher level of useful energy to feed an ever-increasing demand of energy to satisfy a wide range of endo- and exosomatic human needs seems adequate. In fact, surplus energy is able to cover energy services only after compensating for the energy expenses incurred to build and to run the technology itself. This paper proposes an energy sustainability analysis (ESA) methodology based on the internal and external energy use of a given technology, considering the entire energy trajectory from energy sources to useful energy. ESA analysis is conducted at two levels: (i) short-term, by the use of the energy sustainability index (ESI), which is the first step to establish whether the energy produced is able to cover the direct energy expenses needed to run the technology and (ii) long-term, by which all the indirect energy-quotas are considered, i.e., all the additional energy requirements of the technology, including the energy amortization quota necessary for the replacement of the technology at the end of its operative life. The long-term level of analysis is conducted by the evaluation of two indicators: the energy return per unit of energy invested (EROI) over the operative life and the energy payback-time (EPT), as the minimum lapse at which all energy expenditures for the production of materials and their construction can be repaid to society. The ESA methodology has been applied to the case study of H2 production at small-scale (10–15 kWH2) comparing three different technologies: (i) steam-methane reforming (SMR), (ii) solar-powered water electrolysis (SPWE), and (iii) two-stage anaerobic digestion (TSAD) in order to score the technologies from an energy sustainability perspective.

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“…and others [42]. However, furfural may inhibit the growth of these bacteria, particularly when pure strains are used for hydrogen production [43,44]. Not only is the application of pure cultures expensive but it is also problematic due to the high risk of contamination by wild species [44].…”

Section: Introductionmentioning

confidence: 99%

The Use of Acidic Hydrolysates after Furfural Production from Sugar Waste Biomass as a Fermentation Medium in the Biotechnological Production of Hydrogen

et al. 2019

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This study investigates a simultaneous processing of sugar beet pulp (SBP) for furfural, hydrogen and methane production using various pretreatment methods. In the experiments, sugar beet pulp was first subjected to thermal and thermochemical pretreatment at 140 °C. Then hydrolysates from these operations were investigated for their potential for methane and hydrogen production in batch tests. The experiments showed that thermal pretreatment of SBP resulted in the highest biogas and methane yields of 945 dm3/kg volatile solids (VS) and 374 dm3 CH4/kg VS, respectively, and a moderate hydrogen production of 113 dm3 H2/kg VS, which corresponded to a calculated energy production of 142 kWh/t; however, only low amount of furfural was obtained (1.63 g/L). Conversely, the highest furfural yield of 12 g/L was achieved via thermochemical pretreatment of SBP; however, biogas production from hydrolysate was much lower (215 dm3/kg VS) and contained only 67 dm3/kg VS of hydrogen. Meanwhile, in the experiment with lower amounts of sulfuric acid (2%) used for pretreatment, a moderate furfural production of 4 g/L was achieved with as high as 220 dm3/kg VS of hydrogen and the corresponding energy yield of 75 kWh/t.

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Seed Pretreatment for Increased Hydrogen Production Using Mixed-Culture Systems with Advantages over Pure-Culture Systems

Cited by 58 publications

References 143 publications

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Energy Sustainability Analysis (ESA) of Energy-Producing Processes: A Case Study on Distributed H2 Production

The Use of Acidic Hydrolysates after Furfural Production from Sugar Waste Biomass as a Fermentation Medium in the Biotechnological Production of Hydrogen

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