Magnetite/graphene oxide nano-composite for enhancement of hydrogen production from gelatinaceous wastewater

Mostafa, Alsayed; El‐Dissouky, Ali; Fawzy, A. M.; Farghaly, A. M.; Peu, Pascal; Dabert, Patrick; Roux, Sophie; Tawfik, Ahmed

doi:10.1016/j.biortech.2016.05.072

Cited by 70 publications

(30 citation statements)

References 29 publications

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“…The percentages of HPR increases (%) as a result of MNP supplementation were 29.7 ± 3.1, 39.5 ± 3.5, 42.1 ± 3.9, 31.8 ± 2.4, 23.7 ± 2.9, and 14.6 ± 2.1% corresponding to OLRs of 0.8, 1.1, 1.6, 2.1, 3.2, and 4.8 g COD /L/day, respectively. Such enhancement effect of MNPs on biological H 2 productivity was previously emphasized as described at Table , since H 2 increase (%) ranged from 20.1 to 57.0% was previously harvested from batch reactors amended with MNPs . However, the new finding herein is that the H 2 increase percentage is OLR dependent.…”

Section: Resultssupporting

confidence: 62%

“…XRD, Fourier transform infrared (FTIR) spectra, and SEM devices of Shimadzu XRD‐6100 in the 2θ range 20° to 94°, VERTEX 70 spectrometer over the wave number range 3400 to 400 cm −1 , and JEOL 6100 were carried out, respectively . The methylene blue reduction method was used for the quantification of hydrogenase enzymes' activities …”

Section: Methodsmentioning

confidence: 99%

“…33 The methylene blue reduction method was used for the quantification of hydrogenase enzymes' activities. 34…”

Section: Methodsmentioning

confidence: 99%

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Upgrading continuous H₂gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

et al. 2019

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Summary Continuous H2 production from alkali‐hydrolyzed rice straw in two mesophillic anaerobic baffled reactors (ABRs) was investigated in parallel. ABR1 was inoculated with thermally pretreated sludge while the sludge in ABR2 was amended with magnetite nanoparticles (MNPs). Both reactors were operated at organic loading rates (OLRs) ranged from 0.8 to 4.8 gCOD/L/day. The addition of MNPs significantly improved the H2 production and yield, ie, maximum H2 yield was 21.4 ± 3.2 and 60.6 ± 5.7 mL/g CODremoved for both ABR1 and ABR2, respectively, at OLR of 1.6 gCOD/L/day. Likewise, substrate degradation efficiency (SDE) was augmented from 48.4 ± 3.9% (ABR1) to 55.8 ± 4.2% (ABR2). The enhancement effect of MNPs can be emphasized by hydrogenase enzyme activity increase from 0.097 ± 0.013 to 0.205 ± 0.019 mg MBreduced/min at ABR1 and ABR2, respectively. Besides, ABR2 witnessed higher concentrations of acetate (HAc) and butyrate (HBu) coupled with lower values of propionate (HPr). Additionally, HAc/HBu ratio for ABR2 (3.03 ± 0.31) was higher than that for ABR1 (1.95 ± 0.29). Microbial analysis indicated that Bacillus and Clostridium species became dominant in mixed culture bacteria supplemented with MNPs. Furthermore, economic analysis revealed that the minimum payback period of 10.5 years at OLR of 3.2 gCOD/L/day was recorded for ABR2 compared with 14.6 years at OLR of 4.8 gCOD/L/day for ABR1.

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Section: Resultssupporting

confidence: 62%

Section: Methodsmentioning

confidence: 99%

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Upgrading continuous H₂gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

et al. 2019

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“…Li et al (2014b) investigated the effects of Fe as catalyst for methane decomposition using three porous supports namely HBETA zeolite, HZSM-5 zeolite and Al2O3 and reported highest H2 production with 20 wt% Fe using Al2O3 as support. Mostafa et al (2016) reported that the addition of magnetite/graphene oxide (MGO) enhanced biohydrogen production from dark fermentation of gelatinaceous wastewater and is due to change from the propionic metabolic pathway to the butyric reaction path. On the other hand, the conversion procedure of magnetite/graphene oxide nano composite is almost of the given dosage dependent.…”

Section: Metal-based Nanoparticulate Catalysismentioning

confidence: 99%

A review of research trends in the enhancement of biomass-to-hydrogen conversion

et al. 2018

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Different types of biomass are being examined for their optimum hydrogen production potentials and actual hydrogen yields in different experimental setups and through different chemical synthetic routes. In this review, the observations emanating from research findings on the assessment of hydrogen synthesis kinetics during fermentation and gasification of different types of biomass substrates have been concisely surveyed from selected publications. This review revisits the recent progress reported in biomass-based hydrogen synthesis in the 2 associated disciplines of microbial cell immobilization, bioreactor design and analysis, ultrasound-assisted, microwave-assisted and ionic liquid-assisted biomass pretreatments, development of new microbial strains, integrated production schemes, applications of nanocatalysis, subcritical and supercritical water processing, use of algae-based substrates and lastly inhibitor detoxification. The main observations from this review are that cell immobilization assists in optimizing the biomass fermentation performance by enhancing bead size, providing for adequate cell loading and improving mass transfer; there are novel and more potent bacterial and fungal strains which improve the fermentation process and impact on hydrogen yields positively; application of microwave irradiation and sonication and the use of ionic liquids in biomass pretreatment bring about enhanced delignification, and that supercritical water biomass processing and dosing with metal-based nanoparticles also assist in enhancing the kinetics of hydrogen synthesis. The research areas discussed in this work and their respective impacts on hydrogen synthesis from biomass are arguably standalone. Thence, further work is still required to explore the possibilities and techno-economic implications of combining these areas for developing robust and integrated biomass-to-hydrogen synthetic schemes.

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“…31 Magnetite is commonly used as a catalyst in several reaction types, e.g., organic reactions, 32 ammonia synthesis and degradation of organic contaminants. 33 In this study we report the catalytic effects of mesoporous silica (SBA- [15][16] supported iron catalysts with the goal of upgrading the thermal decomposition products of deoiled algae and jatropha seed cakes. Magnetite (Fe 3 O 4 ) catalyst was used for comparison with the silica supported iron catalysts because Fe 3 O 4 iron phase had been formed in the supported catalysts after calcination.…”

Section: S4mentioning

confidence: 99%

Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake

et al. 2016

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Abstract:The thermal decomposition of the by-products of the biodiesel process was studied by thermoanalytical methods. De-oiled algae cake and jatropha seed de-oiled cake were pyrolyzed and the catalytic effects of silica supported iron catalysts (Fe/FSM-16 and Fe/SBA-15) and magnetite (Fe 3 O 4 ) were tested. The evolution profiles of the decomposition products as well as the thermal stability of the samples were determined by thermogravimetry/mass spectrometry (TG/MS). The formation of the volatile products was monitored by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The composition and the amounts of the S2 gaseous products changed significantly in the presence of the silica supported iron catalysts: the yield of hydrogen and carbon monoxide considerably increased above the decomposition temperature of 400 °C. Both silica supported iron catalysts had important effects on the yield of the products originating from carbohydrates and lignins. The formation of anhydrosugars and phenolic compounds was hindered, while the evolution of aromatic and aliphatic hydrocarbons was enhanced. Fe/FSM-16 proved to be more efficient than Fe/SBA-15 and Fe 3 O 4 catalysts. The thermal decomposition of the protein content of the samples resulted in the formation of 2,5-diketopiperazines and smaller molecules (e.g., ammonia). The silica supported iron catalysts had a special effect: their presence promoted the reaction of fatty acid esters and ammonia resulting in the formation of alkyl nitriles during the thermal decomposition.

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Magnetite/graphene oxide nano-composite for enhancement of hydrogen production from gelatinaceous wastewater

Cited by 70 publications

References 29 publications

Upgrading continuous H₂gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

Upgrading continuous H₂gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

A review of research trends in the enhancement of biomass-to-hydrogen conversion

Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake

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Magnetite/graphene oxide nano-composite for enhancement of hydrogen production from gelatinaceous wastewater

Cited by 70 publications

References 29 publications

Upgrading continuous H2gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

Upgrading continuous H2gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

A review of research trends in the enhancement of biomass-to-hydrogen conversion

Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake

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Product

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Upgrading continuous H₂gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

Upgrading continuous H₂gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles