Enhancing biomethane production by integrating pyrolysis and anaerobic digestion processes

Salman, Chaudhary Awais; Schwede, Sebastian; Thorin, Eva; Yan, Jinyue

doi:10.1016/j.apenergy.2017.05.006

Cited by 83 publications

(26 citation statements)

References 34 publications

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“…The linked methyl group formed with the CO created via the CO 2 reduction and CoA remaining in the cell are further transformed to acetyl‐CoA via acetyl‐CoA synthase and CO dehydrogenase. Finally, different types of valuable compounds and ethanol are obtainable from acetyl‐CoA . The syngas has different routes of application; an energy source via taking advantages of the CH 4 and CO etc, as biogas and biodiesel for transport, valuable chemicals such as NH 4 and CH 4 OH; and the usage as electric energy and gas fuel to fire thermal plants .…”

Section: Pyrolysis Coupled Ad Considerationsmentioning

confidence: 99%

“…Recent studies have shown that introducing of biochar as additives in AD can enhance the formation of the biofilm and improve the output of bio‐methane to 5%‐31% . Besides, second‐stage pyrolysis decomposition of the ROR and subsequent oil/tar to syngas can find a route of utilization in AD, thus avoiding direct usage of oil/tar that can pose as toxicants to AD microbes.…”

Section: Introductionmentioning

confidence: 99%

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Pyrolysis coupled anaerobic digestion process for food waste and recalcitrant residues: Fundamentals, challenges, and considerations

Giwa

Chang

et al. 2019

Energy Science & Engineering

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Food waste (FW) is a severe environmental problem all over the world, and the recalcitrant organic residues (ROR) from FW treatment plant operations are also a critical environmental issue due to unsustainable treatment and disposal techniques.Requirements for FW and ROR complete exploitation with the establishment of recycling-renewable technologies are very crucial. This paper review AD and pyrolysis as two promising technologies to degrade FW and its residues, creating numerous renewable bioenergy yields with value-added. Existing oil/tar application methods in the AD suffered from various problems such as microorganism toxicity and limited productivity. Future upgrading techniques considering the second-stage pyrolysis process to decompose oil/tars for syngas with high hydrogen content and enhanced bio-methanation in the AD were addressed. Simultaneous pyrolysis by-product recycle in the AD during the valorization of FW are aimed to have the features of sustainability toward increased bioenergy production, reactor efficiency, and agricultural application. K E Y W O R D Sanaerobic digestion, coupling, food waste, pyrolysis, recalcitrant organic residues | 2251 GIWA et Al.

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Section: Pyrolysis Coupled Ad Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pyrolysis coupled anaerobic digestion process for food waste and recalcitrant residues: Fundamentals, challenges, and considerations

Giwa

Chang

et al. 2019

Energy Science & Engineering

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“…The existing CHP plant was previously modeled and simulated by authors [1]. Modelling and simulation of pyrolysis and gasification processes were also developed by authors previously [1], [2], [8], [9]. The bio-oil upgradation methodology has been adopted by Dutta et al [6].…”

Section: Process Modeling and Simulationmentioning

confidence: 99%

Future directions for CHP plants using biomass and waste – adding production of vehicle fuels

et al. 2019

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In Northern Europe, the production of many biobased CHP plants is getting affected due to the enormous expansion of wind and solar power. In addition, heat demand varies throughout the year, and existing CHP plants show less technical performance and suffer economically. By integrating the existing CHP plants with other processes for the production of chemicals, they can be operated more hours, provide operational and production flexibility and thus increase efficiency and profitability. In this paper, we look at a possible solution by converting an existing CHP plant into integrated biorefinery by retrofitting pyrolysis and gasification process. Pyrolysis is retrofitted in an existed CHP plant. Bio-oil obtained from pyrolysis is upgraded to vehicle grade biofuels. Gasification process located upfront of CHP plant provides the hydrogen required for upgradation of biofuel. The results show that a pyrolysis plant with 18 ton/h feed handling capacity (90 MWth), when integrated with gasification for hydrogen requirement and CHP plant for heat can produce 5.2 ton/h of gasoline/diesel grade biofuels. The system integration gives positive economic benefits too but the annual operating hours can impact economic performance.

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“…Biogas is produced via anaerobic digestion, which is a biochemical conversion mechanism of biomass into useful fuel. The process involves the digestion of human, animal, and plant waste with anaerobic organisms in the absence of oxygen in the digester [146,147]. Biogas can also be produced via anaerobic fermentation in landfill, which is referred to as landfill gas.…”

Section: Natural Gas From Other Sources (Renewable Cng and Biomethane)mentioning

confidence: 99%

Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue

2018

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Energy sustainability and environmental issues pose greater challenges on different primary energy sectors as the global energy demand increases and it is projected to further increase with an upsurge in population. On the other hand, energy sources from conventional fossil-based fuels are depleting, forcing explorations in challenging and difficult locations. As a result, the use of alternative fuels received dramatic consideration to substitute these conventional fuels, of which natural gas took the significant share. However, the share of natural-gas vehicles in the current vehicle market is quite small, and it is estimated to be below 5%. This paper reviews the current resource scenarios including proven and potential reserves, current production, and consumption, along with the fueling infrastructure, distribution, and storage. It also provides summary of the development of fuel-injection technologies aimed to enhance the performance of gas engines. More attention was also given to natural-gas engines and their limitations. Parameters affecting the performance and combustion of compressed natural gas (CNG) in spark-ignition (SI) engines are thoroughly assessed, among which compression ratio and injection timing play major roles in the optimization of CNG-fueled engines. Furthermore, different technologies that help close the performance gap between conventional liquid-fuel and natural-gas engines and future directions of the research are presented.

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Enhancing biomethane production by integrating pyrolysis and anaerobic digestion processes

Cited by 83 publications

References 34 publications

Pyrolysis coupled anaerobic digestion process for food waste and recalcitrant residues: Fundamentals, challenges, and considerations

Pyrolysis coupled anaerobic digestion process for food waste and recalcitrant residues: Fundamentals, challenges, and considerations

Future directions for CHP plants using biomass and waste – adding production of vehicle fuels

Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue

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