Development of Membrane Concentration Reactor for High Rate-Fermentable Hydrogen Production from Organic Wastes

2017 ◽  
Vol 18 (6) ◽  
pp. 586-586
Author(s):  
Yong Jin Choi
Keyword(s):  
Hydrogen Production ◽  
Organic Wastes ◽  
High Rate ◽  
Membrane Concentration

Hydrogen fermentation of organic municipal wastes

2000 ◽  
Vol 42 (12) ◽  
pp. 155-162 ◽  
Author(s):  
T. Noike ◽  
O. Mizuno
Keyword(s):  
Hydrogen Production ◽  
Rice Bran ◽  
Wheat Bran ◽  
Energy Resource ◽  
Organic Wastes ◽  
Hydrogen Gas ◽  
High Rate ◽  
Hydrogen Recovery ◽  
Carbohydrate Degradation ◽  
Fermentative Bacteria

Hydrogen gas is recognized as a promising energy resource in the future. Microbial hydrogen fermentation would be an attractive process for hydrogen recovery. In particular, hydrogen production using fermentative bacteria has some advantages such as a high rate of hydrogen production without light. In this study, the hydrogen production from organic wastes was investigated using batch experiments. Bean curd manufacturing waste, rice bran and wheat bran were used as the organic wastes. The effects of solid concentration on the hydrogen production potential and the characteristics of substrate decomposition were investigated. The percentages of hydrogen in the produced gas were between 54–78%, 43–68% and 42–72% for bean curd manufacturing waste, ricebran and wheat bran, respectively. The hydrogen production potentials of bean curd manufacturing waste, rice bran and wheat bran were 14–21, 31–61 and 10–43 ml.g VS−1, respectively. The hydrogen yields from carbohydrate degradation were 2.54, 1.29 and 1.73 mol of H2 mol−1 of hexose for bean curd manufacturing waste, rice bran and wheat bran, respectively. The carbohydrate was rapidly consumed just after inoculation. On the other hand, soluble protein was hardly degraded for each substrate, indicating that carbohydrate was the main source of the hydrogen production.

A bio-inspired mononuclear manganese catalyst for high-rate electrochemical hydrogen production

2021 ◽  
Vol 50 (14) ◽  
pp. 4783-4788
Author(s):  
Jie Yang ◽  
Shuanglin He ◽  
Qianqian Wu ◽  
Ping Zhang ◽  
Lin Chen ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Electrochemical Measurements ◽  
High Rate ◽  
Turnover Frequency ◽  
Molecular Catalyst ◽  
Proton Relay ◽  
Excellent Activity

A bio-inspired manganese molecular catalyst featuring an intramolecular aniline as a proton relay was synthesized and used for hydrogen production. Electrochemical measurements with this complex show excellent activity (turnover frequency over 104 s−1).

scholarly journals Zeolite addition to improve biohydrogen production from dark fermentation of C5/C6-sugars and Sargassum sp. biomass

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
R. M. Silva ◽  
A. A. Abreu ◽  
A. F. Salvador ◽  
M. M. Alves ◽  
I. C. Neves ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Anaerobic Bacteria ◽  
Dark Fermentation ◽  
Inorganic Materials ◽  
Biohydrogen Production ◽  
High Rate ◽  
Continuous Reactor ◽  
Organic Loading Rate ◽  
Fermentation Products ◽  
Zeolite Type

AbstractThermophilic biohydrogen production by dark fermentation from a mixture (1:1) of C5 (arabinose) and C6 (glucose) sugars, present in lignocellulosic hydrolysates, and from Sargassum sp. biomass, is studied in this work in batch assays and also in a continuous reactor experiment. Pursuing the interest of studying interactions between inorganic materials (adsorbents, conductive and others) and anaerobic bacteria, the biological processes were amended with variable amounts of a zeolite type-13X in the range of zeolite/inoculum (in VS) ratios (Z/I) of 0.065–0.26 g g−1. In the batch assays, the presence of the zeolite was beneficial to increase the hydrogen titer by 15–21% with C5 and C6-sugars as compared to the control, and an increase of 27% was observed in the batch fermentation of Sargassum sp. Hydrogen yields also increased by 10–26% with sugars in the presence of the zeolite. The rate of hydrogen production increased linearly with the Z/I ratios in the experiments with C5 and C6-sugars. In the batch assay with Sargassum sp., there was an optimum value of Z/I of 0.13 g g−1 where the H2 production rate observed was the highest, although all values were in a narrow range between 3.21 and 4.19 mmol L−1 day−1. The positive effect of the zeolite was also observed in a continuous high-rate reactor fed with C5 and C6-sugars. The increase of the organic loading rate (OLR) from 8.8 to 17.6 kg m−3 day−1 of COD led to lower hydrogen production rates but, upon zeolite addition (0.26 g g−1 VS inoculum), the hydrogen production increased significantly from 143 to 413 mL L−1 day−1. Interestingly, the presence of zeolite in the continuous operation had a remarkable impact in the microbial community and in the profile of fermentation products. The effect of zeolite could be related to several properties, including the porous structure and the associated surface area available for bacterial adhesion, potential release of trace elements, ion-exchanger capacity or ability to adsorb different compounds (i.e. protons). The observations opens novel perspectives and will stimulate further research not only in biohydrogen production, but broadly in the field of interactions between bacteria and inorganic materials.

One Pot Microwave Irradiation Synthesis of Spherical and Nanotube Titanates Incorporated Reduced Graphene for Efficient Hydrogen Production Photo-Electrocatalytically

2021 ◽  
Author(s):  
Mohamed Mohamed ◽  
Mahmoud M. Hessien ◽  
Mohamed M. Ibrahim
Keyword(s):  
Hydrogen Production ◽  
Microwave Irradiation ◽  
Particle Diameter ◽  
Hybrid Structure ◽  
High Rate ◽  
Solar Irradiation ◽  
High Quantum Yield ◽  
One Pot ◽  
Reduced Graphene ◽  
A Current

Abstract Nanosphere and nanotube titanates (TNT) amalgamated with different graphene oxide (GO) ratios synthesized by one pot microwave irradiation route have presented excellent potential towards hydrogen production photoelectrochemically under solar irradiation. The hybrid nanospherical array of the 50TNT-50GO photocatalyst showed a current density equal 9.2 mA cm-2 at a bias of 0.20 V vs. RHE exceeding those of the nanotubes 30TNT-70GO (4.0 mA cm-2 at 0.38 V) and 10TNT-90GO (3.7 mA cm-2 at 0.4 V). The former electrode also exhibits small Tafel slope value (40 mV dec-1), decreased particle diameter (7 nm), decreased band gap (2.6 eV) and high rate of charges transfer. The hybrid structure elucidation carried out using TEM-SAED, XRD, N2 adsorption, UV-Vis, FTIR and PL techniques approved the interfacial interaction between TNT and GO(RGO) networks that was responsible for the high quantum yield, delay of charges recombination beside the increase in the pore volume.

High-rate mesophilic hydrogen production from food waste using hybrid immobilized microbiome

2021 ◽  
Vol 320 ◽  
pp. 124279
Author(s):  
Ju-Hyeong Jung ◽  
Young-Bo Sim ◽  
Jong-Hyun Baik ◽  
Jong-Hun Park ◽  
Sang-Hyoun Kim
Keyword(s):  
Hydrogen Production ◽  
Food Waste ◽  
High Rate

Bio-hydrogen production from organic wastes in a pilot plant reactor and its use in a SOFC

2011 ◽  
Vol 36 (13) ◽  
pp. 7861-7865 ◽  
Author(s):  
B. La Licata ◽  
F. Sagnelli ◽  
A. Boulanger ◽  
A. Lanzini ◽  
P. Leone ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Pilot Plant ◽  
Organic Wastes ◽  
Plant Reactor ◽  
Pilot Plant Reactor

scholarly journals Hydrogen Production from Coffee Mucilage in Dark Fermentation with Organic Wastes

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 71 ◽  
Author(s):  
Edilson Cárdenas ◽  
Arley Zapata-Zapata ◽  
Daehwan Kim
Keyword(s):  
Hydrogen Production ◽  
Manufacturing Industry ◽  
Nitrogen Sources ◽  
Bacterial Consortium ◽  
Dark Fermentation ◽  
Organic Wastes ◽  
Hydrogen Yield ◽  
Hydrogen Metabolism ◽  
Wholesale Market ◽  
Experimental Conditions

One of primary issues in the coffee manufacturing industry is the production of large amounts of undesirable residues, which include the pericarp (outer skin), pulp (outer mesocarp), parchment (endocarp), silver-skin (epidermis) and mucilage (inner mesocarp) that cause environmental problems due to toxic molecules contained therein. This study evaluated the optimal hydrogen production from coffee mucilage combined with organic wastes (wholesale market garbage) in a dark fermentation process. The supplementation of organic wastes offered appropriate carbon and nitrogen sources with further nutrients; it was positively effective in achieving cumulative hydrogen production. Three different ratios of coffee mucilage and organic wastes (8:2, 5:5, and 2:8) were tested in 30 L bioreactors using two-level factorial design experiments. The highest cumulative hydrogen volume of 25.9 L was gained for an 8:2 ratio (coffee mucilage: organic wastes) after 72 h, which corresponded to 1.295 L hydrogen/L substrates (0.248 mol hydrogen/mol hexose). Biochemical identification of microorganisms found that seven microorganisms were involved in the hydrogen metabolism. Further studies of anaerobic fermentative digestion with each isolated pure bacterium under similar experimental conditions reached a lower final hydrogen yield (up to 9.3 L) than the result from the non-isolated sample (25.9 L). Interestingly, however, co-cultivation of two identified microorganisms (Kocuria kristinae and Brevibacillus laterosporus), who were relatively highly associated with hydrogen production, gave a higher yield (14.7 L) than single bacterium inoculum but lower than that of the non-isolated tests. This work confirms that the re-utilization of coffee mucilage combined with organic wastes is practical for hydrogen fermentation in anaerobic conditions, and it would be influenced by the bacterial consortium involved.

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