Rational Scale-Up of a methane producing bioelectrochemical reactor to 50 L pilot scale

Enzmann, Franziska; Holtmann, Dirk

doi:10.1016/j.ces.2019.07.051

Cited by 48 publications

(18 citation statements)

References 48 publications

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“…Changing the applied current, the different portions of the power input (Eq. ) show different behaviors (equations in ). While the power input caused by electricity increases with an exponent of two with increasing current, the heating energy and the gassing energy remain stable since they are not depending on the current.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of Bioelectromethanogenesis Part I: Energy Calculations

Enzmann

Gronemeier

Holtmann

2019

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Bioelectromethanogenesis, a technology to convert electrical energy into CH 4 , is on the transition from lab-scale to industrial application. But the question arises if it is really a sustainable technology or just another scientific artifact. Especially the energy efficiency is a crucial aspect to allow conclusions about the applicability. In this paper, the basics of energy calculations are applied to literature data to model the energy efficiency. Different scenarios were calculated, showing that further research has to be conducted to turn bioelectromethanogenesis into a feasible technology.

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Section: Resultsmentioning

confidence: 99%

“…To evaluate the process of bioelectromethanogenesis, already published data was used . The bioelectromethanogenic experiment described used a 50‐L pilot plant with a pure culture of Methanococcus maripaludis , which was already described as electroactive methanogen.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Bioelectromethanogenesis Part I: Energy Calculations

Enzmann

Gronemeier

Holtmann

2019

Chemie Ingenieur Technik

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“…In summary, our investigations show that the optimization of the anode reaction has great potential for optimizing the overall process of MES. Together with current research about the scalability and stability of the process , this optimization possibility can be a further step on the road to industrial application.…”

Section: Discussionmentioning

confidence: 99%

Insights in the anode chamber influences on cathodic bioelectromethanogenesis – systematic comparison of anode materials and anolytes

Enzmann

Stöckl

Gronemeier

et al. 2019

Engineering in Life Sciences

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Cathode and catholyte are usually optimized to improve microbial electrosynthesis process, whereas the anodic counter reaction was not systematically investigated and optimized for these applications yet. Nevertheless, the anolyte and especially the anode material can limit the cathodic bioelectrochemical process. This paper compares for the first time the performance of different anode materials as counter electrodes for a cathodic bioelectrochemical process, the bioelectromethanogenesis. It was observed that depending on the anode material the cathodic methane production varies from 0.96 µmol/d with a carbon fabric anode to 25.44 µmol/d with a carbon felt anode of the same geometrical surface area. The used anolyte also affected the methane production rate at the cathode. Especially, the pH of the anolyte showed an impact on the system; an anolyte with pH 5 produced up to 2.0 times more methane compared to one with pH 8.5. The proton availability is discussed as one reason for this effect. Although some of the measured effects cannot be explained completely so far this study advises researchers to strongly consider the anode impact during process development and optimization of a cathodic bioelectrochemical synthesis process.

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“…The methane production via bioelectromethanogenesis in a 50 L reactor was 0.23 mmol/l/d with a pure culture of electroactive methanogens, Methanococcus maripaludis [ 182 ], 1/6 of that observed in the lab scale reactor. Twenty modules, in a circular configuration, comprised the pilot scale with carbon laying electrodes (HP textiles, Schape, Germany) as working electrodes in the inner chambers, and a counter chamber with 20 sheets of carbon fabric electrodes, which are placed circularly around the working chamber.…”

Section: Industrialization and Patentsmentioning

confidence: 99%

“…The gas flux of pure CO 2 was set to 1.5 L/min. The energy efficiency was 27% [ 182 ]. Siemens and Evonik (Essen, Germany) are now building a test plant at the Evonik facility in Marl, Germany, to electroreduce CO 2 to CO and posteriorly to butanol and hexanol [ 183 ].…”

Section: Industrialization and Patentsmentioning

confidence: 99%

Reactor Designs and Configurations for Biological and Bioelectrochemical C1 Gas Conversion: A Review

Ayol

Peixoto

Keskin

et al. 2021

IJERPH

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Microbial C1 gas conversion technologies have developed into a potentially promising technology for converting waste gases (CO2, CO) into chemicals, fuels, and other materials. However, the mass transfer constraint of these poorly soluble substrates to microorganisms is an important challenge to maximize the efficiencies of the processes. These technologies have attracted significant scientific interest in recent years, and many reactor designs have been explored. Syngas fermentation and hydrogenotrophic methanation use molecular hydrogen as an electron donor. Furthermore, the sequestration of CO2 and the generation of valuable chemicals through the application of a biocathode in bioelectrochemical cells have been evaluated for their great potential to contribute to sustainability. Through a process termed microbial chain elongation, the product portfolio from C1 gas conversion may be expanded further by carefully driving microorganisms to perform acetogenesis, solventogenesis, and reverse β-oxidation. The purpose of this review is to provide an overview of the various kinds of bioreactors that are employed in these microbial C1 conversion processes.

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Rational Scale-Up of a methane producing bioelectrochemical reactor to 50 L pilot scale

Cited by 48 publications

References 48 publications

Evaluation of Bioelectromethanogenesis Part I: Energy Calculations

Evaluation of Bioelectromethanogenesis Part I: Energy Calculations

Insights in the anode chamber influences on cathodic bioelectromethanogenesis – systematic comparison of anode materials and anolytes

Reactor Designs and Configurations for Biological and Bioelectrochemical C1 Gas Conversion: A Review

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