Study of the performance of a thermophilic biological methanation system

Guneratnam, Amita Jacob; Ahern, Emer; FitzGerald, Jamie A.; Jackson, Stephen A.; Xia, Ao; Dobson, Alan D. W.; Murphy, Jerry D.

doi:10.1016/j.biortech.2016.11.066

Cited by 73 publications

(53 citation statements)

References 34 publications

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“…More specifically, it was shown that enriched thermophilic culture resulted in > 60% higher H 2 and CO 2 bioconversion compared to the mesophilic culture in batch assay . Another study concluded that an increment of the operating temperature from 55°C to 65°C leads to more efficient biomethanation operation (Guneratnam et al, 2017). Nevertheless, independently from the temperature conditions, an adaptation period is needed for the microorganisms to be able to efficiently ferment the CO 2 and H 2 gasses.…”

Section: Chemautotrophic Methodsmentioning

confidence: 99%

Biogas upgrading and utilization: Current status and perspectives

Angelidaki

Treu

Tsapekos

et al. 2018

Biotechnology Advances

1,049

560

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Biogas production is an established sustainable process for simultaneous generation of renewable energy and treatment of organic wastes. The increasing interest of utilizing biogas as substitute to natural gas or its exploitation as transport fuel opened new avenues in the development of biogas upgrading techniques. The present work is a critical review that summarizes state-of-the-art technologies for biogas upgrading and enhancement with particular attention to the emerging biological methanation processes. The review includes comprehensive description of the main principles of various biogas upgrading methodologies, scientific and technical outcomes related to their biomethanation efficiency, challenges that have to be addressed for further development and incentives and feasibility of the upgrading concepts.

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Section: Chemautotrophic Methodsmentioning

confidence: 99%

Biogas upgrading and utilization: Current status and perspectives

Angelidaki

Treu

Tsapekos

et al. 2018

Biotechnology Advances

1,049

560

View full text Add to dashboard Cite

show abstract

“…Recent studies on the BHM also indicate, that temperature has a substantial impact on the reaction velocity and the response time, which allows higher loading rates to be achieved [17]. It is reported that the operation of a BHM system is significantly more efficient at 65 • C than at 55 • C [18]. Reference [19] are slightly more specific and describe an increase in the conversion of H 2 and CO 2 by 60%, with an increase in the process temperature from mesophilic (37 • C) to thermophilic (55 • C).…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Operating Temperatures on the Biological Hydrogen Methanation in Trickle Bed Reactors

Lemmer

Ullrich

2018

Energies

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To improve the reactor efficiency, this study investigated the influence of temperature on the biological hydrogen methanation (BHM) in trickle-bed reactors (TBR). Rising temperatures increase the metabolic activity of methanogenic microorganisms, thus leading to higher reactor specific methane formation rates (MFR). In order to quantify the potential for improved performance, experiments with four different operating temperatures ranging from 40 to 55 • C were carried out. Methane content increased from 88.29 ± 2.12 vol % at 40 • C to 94.99 ± 0.81 vol % at 55 • C with a stable biological process. Furthermore, a reactor specific methane formation rate (MFR) of up to 8.85 ± 0.45 m 3 m −3 d −1 was achieved. It could be shown that the microorganisms were able to adapt to higher temperatures within hours. The tests showed that TBR performance with regard to BHM can be significantly increased by increasing the operating temperature.

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“…In general, the use of catalysts can reduce the activation energy of the hydrolysis reaction . For example; the Twitchell fat hydrolysis was performed under mild conditions using the Twitchell reagent, a catalyst composed of oleic acid, H 2 SO 4 , and hydrocarbons .…”

Section: Introductionmentioning

confidence: 99%

An integrated process of catalytic hydrolysis and membrane separation for fatty acids production from lard oil

Ding

Lü³

et al. 2018

Can J Chem Eng

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An integrated process of catalytic hydrolysis and membrane separation was developed for fatty acids (FAs) production from lard oil. Both sulphonated cation exchange resin (SCER) and 0.98 g/g H 2 SO 4 as catalysts were used to produce fatty acids (FAs) from lard oil by three-step hydrolysis, respectively. Simultaneously, polyethersulphone (PES) ultrafiltration membrane was employed to separate glycerol and water from the products. The hydrophilicity and morphology of the pristine and used PES membranes were characterized by contact angle measurement and field-emission scanning electronic microscopy, respectively. The final optimal yields of FAs obtained by SCER and H 2 SO 4 catalysis at 100 8C and atmospheric pressure were 85.6 % at 16.0 h of operation and 94.5 % at 18.0 h of operation, respectively. Furthermore, the yield of FAs obtained from an integrated process of SCER-catalyzed hydrolysis and membrane separation achieved up to 99.9 % at 10.0 h, 90 8C, and operating pressure of 100 kPa.

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Study of the performance of a thermophilic biological methanation system

Cited by 73 publications

References 34 publications

Biogas upgrading and utilization: Current status and perspectives

Biogas upgrading and utilization: Current status and perspectives

Effect of Different Operating Temperatures on the Biological Hydrogen Methanation in Trickle Bed Reactors

An integrated process of catalytic hydrolysis and membrane separation for fatty acids production from lard oil

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