A review of hydrogen production from anaerobic digestion

Zappi, Alex; Hernández, Rafael; Holmes, William E.

doi:10.1007/s13762-020-03117-w

Cited by 20 publications

(8 citation statements)

References 53 publications

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“…Particulate substances enter the reactor with a certain load and concentration, degrade and produce, mainly, methane, carbon dioxide and hydrogen sulphide. Hydrogen production is not taken into consideration since its production is very small (∼ppm) due to syntrophic interactions [13], and will not be accounted in later calculations.…”

Section: Model Assumptions and Schematisationmentioning

confidence: 99%

Thermodynamic Equilibrium Study of Anaerobic Digestion through Helmholtz Equation of State

2023

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The growing attention regarding a more sustainable future, and thus into energy recovery and waste reduction technologies, has intensified the interest towards processes which allow to exploit waste and biomasses to generate energy, such as the anaerobic digestion. Improving the efficiency of this industrial application is crucial to increase methane production, and is essential from the economic, environmental and safety point of view. This study focuses on the thermodynamic modelling of a steady-state reactor as a flash unit, in order to determine the best operating conditions to produce the maximum amount of pure bio-methane. To this purpose, a new hybrid approach based on the Peng–Robinson cubic equation of state and on the Multi-Parameter Helmholtz-Energy EoS has been proposed. The simulations, performed using the developed algorithm at temperatures between 20 and 55 °C and at pressure values between 0.3 atm and 1.5 atm, point out that the fugacity of the mixture evaluated with the proposed technique is much more accurate and reliable than the one calculated with the PR EoS. In addition, this research has shown not only that the purity and the production of the biogas can be optimised by working at mesophilic conditions and at pressure between 1 atm and 1.5 atm, but also that it is not convenient to operate in a temperature range of 42 °C–45 °C, since about 20 % more H2S goes into the exiting biogas, reducing the CH4 amount and raising the post-treatment costs. Lastly, it has been seen that there is a significant water content in the vapour phase (∼5 %wt.), and this is a factor to be taken into account in order to improve the process.

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Section: Model Assumptions and Schematisationmentioning

confidence: 99%

Thermodynamic Equilibrium Study of Anaerobic Digestion through Helmholtz Equation of State

2023

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“…Usually, inhabitation methanogenesis would enhance the production of the hydrogen and organic acid [ 27 ]. Two-step AD, separating the hydrogen-producing microorganism and the hydrogen-consuming microorganism, yields more hydrogen than one-step AD [ 28 ]. In the following section, three main energy substances, hydrogen, organic acids, and methane, generation during FWAD and the associated key parameters are discussed.…”

Section: The Current State Of Ad Of Fwmentioning

confidence: 99%

“…In a low-pH environment, it is often beneficial to inhibit the survival and reproduction of hydrogen-consuming microorganisms, thus improving the specific hydrogen production rate of the reaction system [ 48 ]. The optimal pH for maximum hydrogen production is found to be around 5–5.5 [ 28 ]. The change in pH value not only directly affects the growth state of the microbe but also causes changes in microbe morphology and structure [ 49 ] and ultimately leads to changes in the number and species of dominant microorganisms in the reaction system [ 50 ].…”

Section: The Current State Of Ad Of Fwmentioning

confidence: 99%

Anaerobic Digestion of Food Waste and Its Microbial Consortia: A Historical Review and Future Perspectives

Wang

Song

et al. 2022

IJERPH

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Renewable energy source, such as food waste (FW), has drawn great attention globally due to the energy crisis and the environmental problem. Anaerobic digestion (AD) mediated by novel microbial consortia is widely used to convert FW to clean energy. Despite of the considerable progress on food waste and FWAD optimization condition in recent years, a comprehensive and predictive understanding of FWAD microbial consortia is absent and therefore represents a major research challenge in FWAD. The review begins with a global view on the FWAD status and is followed by an overview of the role of AD key conditions’ association with microbial community variation during the three main energy substances (hydrogen, organic acids, and methane) production by FWAD. The following topic is the historical understanding of the FWAD microorganism through the development of molecular biotechnology, from classic strain isolation to low-throughput sequencing technologies, to high-throughput sequencing technologies, and to the combination of high-throughput sequencing and isotope tracing. Finally, the integration of multi-omics for better understanding of the microbial community activity and the synthetic biology for the manipulation of the functioning microbial consortia during the FWAD process are proposed. Understanding microbial consortia in FWAD helps us to better manage the global renewable energy source.

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“…NOx, and CH4). In addition, the global market size for hydrogen generation was estimated at USD 117.49 billion in 2019 and it is expected to reach 164.78 billion by 2027 [1]. This increase can be due to hydrogen properties and uses.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Overview of Hydrogen Production via Coal and Biomass Gasification Technologies

Nashrey

2022

EJENERGY

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Gasification has been receiving interest on a global scale due to its varied uses and benefits. Hydrogen has been also found to be one of the promised fuels that can be produced by gasification. So, coal and biomass gasification has been studied widely. Energy conversion systems based on the use of biomass are of particular interest to science because of their potential to reduce global CO2 emissions. It has been found that BG is an efficient and sustainable route for the production of hydrogen. However, the market for biomass gasification is not yet developed sufficiently for widespread use. There is still a stage of diversity, and no dominating design has emerged. Thus, tar formation and high energy could be issues for implementing BG on a large scale. On the other hand, coal gasification is commercial technology and produces a high amount of syngas and a low cost of production compared to the BG. Therefore, this paper aims to make an overview of both processes in terms of technology and the perspective of their future.

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A review of hydrogen production from anaerobic digestion

Cited by 20 publications

References 53 publications

Thermodynamic Equilibrium Study of Anaerobic Digestion through Helmholtz Equation of State

Thermodynamic Equilibrium Study of Anaerobic Digestion through Helmholtz Equation of State

Anaerobic Digestion of Food Waste and Its Microbial Consortia: A Historical Review and Future Perspectives

Comprehensive Overview of Hydrogen Production via Coal and Biomass Gasification Technologies

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