Hydrogen production from wastewater, storage, economy, governance and applications: a review

Elgarahy, Ahmed M.; Eloffy, M.G.; Hammad, Ahmed; Saber, Ayman N.; El‐Sherif, Dina M.; Mohsen, Ahmed; Abouzid, Mohamed; Elwakeel, Khalid Z.

doi:10.1007/s10311-022-01480-3

Cited by 28 publications

(4 citation statements)

References 323 publications

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“…It is also worth mentioning that in our experiments, KOH was used in WE chambers because MEAs were coated with commercial catalysts, which are not ideal for neutral conditions, leading to significant overpotentials and energy losses . In recent years, novel catalysts suitable for neutral WE , and water coelectrolysis with readily occurring small molecule electro-oxidation reactions , have been extensively studied. Hence, wastewater could be used in all chambers of MWECs in the future, leading to significant improvements in the overall cost and practicality.…”

Section: Resultsmentioning

confidence: 99%

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H₂ Production

Dong,

Pang,

Luo

et al. 2024

ACS Sustainable Chem. Eng.

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The world is facing severe environmental pollution and energy shortages. Microbial electrolysis cells (MECs) provide a promising solution by producing H 2 from wastewater. However, MECs face limitations, such as low current densities, slow H 2 production, and electrogenic bacteria deactivation at high voltages. In this study, we developed microbial water electrolysis cells (MWECs), a new device that couples MECs with water electrolysis (WE). At an applied voltage of 2.2 V, MWECs achieved an industrial-level high current density of 400 mA/ cm 2 , a fast H 2 production rate of 121 L-H 2 /L/d, and a low energy consumption of 5.93 kWh/m 3 . Moreover, the protective effect of the abiotic anode in water electrolysis enabled microorganisms to maintain robust activity at high voltages in MWECs, with Geobacter, Azospirillum, and Paracoccus as the dominant genera. This led to a 2-fold increase in chemical oxygen demand (COD) removal, reaching 1.51 kg/m 3 /d, compared to MECs. This study demonstrated the feasibility and advantages of integrating MECs with water electrolysis to achieve high current densities, fast H 2 production rates, and efficient COD removal rates, making practical applications possible.

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Section: Resultsmentioning

confidence: 99%

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H₂ Production

Dong,

Pang,

Luo

et al. 2024

ACS Sustainable Chem. Eng.

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Section: Electrochemical Production Of Hydrogenmentioning

confidence: 99%

“…44 Numerous hydrogen production techniques, including electrolysis, have been thoroughly researched from an economic, environmental, technological, and social standpoint in the literature. 9,27,42,[45][46][47][48][49][50][51][52][53][54][55][56][57][58] The electrolyser is the fundamental part of an electrolysis process for producing hydrogen (can be connected either in parallel or in series). The by-product gases, typically hydrogen and oxygen, are often cooled and compressed before being stored for multiple end uses.…”

Section: Electrochemical Production Of Hydrogenmentioning

confidence: 99%

Electrochemical hydrogen production: sustainable hydrogen economy

Aslam,

Rani,

Lal

et al. 2023

Green Chem.

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“…Sewage sludge it contains a high amount of microorganisms, organic matter, nutrients, water, and heavy metals. Hydrogen production from sewage sludge doesn't have a high performance by itself as a substrate for an acid fermentation process [9]. Hence, it is necessary to co-fermentation with other by-products that increase hydrogen production efficiency [10].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the lab scale biohydrogen production from co-substrates through dark fermentation by bacterial monocultures and bacterial consortium

Mumtha,

Mahalingam

2023

Preprint

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Dark fermentative biohydrogen production with other waste biomass needs to be explored as an alternative for sustainable biohydrogen production in future. the biohydrogen production from co-substrates (DW + SCB) using bacterial monocultures and its consortium was performed through dark fermentation in a laboratory scale reactor. Co-substrates are a promising substrate for enhanced biohydrogen production. For the experimental set-up, a 1-L-working-volume reactor was used for biohydrogen production by bacterial monocultures and consortium on co-substrates. A batch experiment was performed at 37°C with an initial pH of 7.0 and a mixing ratio of 600:300 between DW and solid SCB. Total solids, volatile solids, total chemical oxygen demand, soluble chemical oxygen demand, and hydrogen production rate were determined from co-substrates during the dark fermentation process. Morphological changes of biohydrogen producing bacteria binds on co-substrates after the fermentation process were determined using SEM imaging. The bacteria can degrade the substrate when they attach to it causing hole formation and cracked the surface area. The level of biohydrogen production by bacterial consortium was observed and the results revealed a 8 cumulative hydrogen production of 1098 mL H2/L, HPR of 35.9 mL H2/h/L, and HY of 3.6 mL/H2/gVS(removal) utilizing co-substrates at pH 7.

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Hydrogen production from wastewater, storage, economy, governance and applications: a review

Cited by 28 publications

References 323 publications

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H₂ Production

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H₂ Production

Electrochemical hydrogen production: sustainable hydrogen economy

Enhancing the lab scale biohydrogen production from co-substrates through dark fermentation by bacterial monocultures and bacterial consortium

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Hydrogen production from wastewater, storage, economy, governance and applications: a review

Cited by 28 publications

References 323 publications

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H2 Production

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H2 Production

Electrochemical hydrogen production: sustainable hydrogen economy

Enhancing the lab scale biohydrogen production from co-substrates through dark fermentation by bacterial monocultures and bacterial consortium

Contact Info

Product

Resources

About

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H₂ Production

Microbial Water Electrolysis Cells for Efficient Wastewater Treatment and H₂ Production