Biocatalytic methanation of hydrogen and carbon dioxide in a fixed bed bioreactor.

Biocatalytic methanation of H2 and CO2 was studied in a fixed bed reactor system consisting of two solid state bioreactors in series connected to a recirculation system. Bioreactors were packed with a mixture of vermiculite shales and granular perlite material as a support material. A maximal methane productivity of 6.35l/lreactord was achieved at a hydrogen feed rate of 25.2l/lreactord, while hydrogen conversion rate was 100%. However, stable operation of the reactor at this efficiency remains to be achieved. Very simple reactor design, constructed from low cost materials, and the idea of exploiting waste material as a robust source of nutrients for methanogens makes this study very interesting regarding the overall usability and suitability of the system as part of a decentralized energy system.

[1]  W. Whitman,et al.  Metabolic, Phylogenetic, and Ecological Diversity of the Methanogenic Archaea , 2008, Annals of the New York Academy of Sciences.

[2]  Freyr Sverrisson,et al.  Renewables 2014 : global status report , 2014 .

[3]  Shiro Nagai,et al.  Continuous CH4 Production from H2 and CO2 by Methanobacterium thermoautotrophicum in a fixed-bed reactor , 1988 .

[4]  B. Ahring,et al.  Increase of anaerobic degradation of particulate organic matter in full-scale biogas plants by mechanical maceration. , 2000, Water science and technology : a journal of the International Association on Water Pollution Research.

[5]  W. Whitman,et al.  Isolation and characterization of 22 mesophilic methanococci , 1986 .

[6]  Danièle Revel,et al.  IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation , 2011 .

[7]  H. Björnsson,et al.  Climate change and energy systems: impacts, risks and adaptation in the Nordic and Baltic countries. , 2012 .

[8]  David Lindley,et al.  Smart grids: The energy storage problem , 2010, Nature.

[9]  W. Whitman,et al.  Methanogens: a window into ancient sulfur metabolism. , 2012, Trends in microbiology.

[10]  H. Fritze,et al.  Short and long-term effects of wood ash on the boreal forest humus microbial community , 2002 .

[11]  M. Burkhardt,et al.  Biocatalytic methanation of hydrogen and carbon dioxide in an anaerobic three-phase system. , 2015, Bioresource technology.

[12]  S. Mahmood,et al.  Effects of hardened wood ash on microbial activity, plant growth and nutrient uptake by ectomycorrhizal spruce seedlings. , 2003, FEMS microbiology ecology.

[13]  L. Alakukku,et al.  Process design and dynamics of a series of continuously fed aerated tank reactors treating dairy manure. , 2013, Bioresource technology.

[14]  N. Nishio,et al.  Biomethanation of H2 and CO2 by Methanobacterium thermoautotrophicum in membrane and ceramic bioreactors , 1987 .

[15]  Mark Z. Jacobson,et al.  Providing all global energy with wind, water, and solar power, Part II: Reliability, system and transmission costs, and policies , 2011 .

[16]  A. Omer.  Energy, environment and sustainable development , 2008 .

[17]  Frede Blaabjerg,et al.  Renewable energy resources: Current status, future prospects and their enabling technology , 2014 .

[18]  Christoph Herwig,et al.  Essential prerequisites for successful bioprocess development of biological CH4 production from CO2 and H2 , 2015, Critical reviews in biotechnology.

[19]  H. Miyafuji,et al.  Effect of wood ash treatment on improving the fermentability of wood hydrolysate. , 2003, Biotechnology and bioengineering.

[20]  James G. Ferry,et al.  Methanogenesis : Ecology, Physiology, Biochemistry and Genetics , 1994 .

[21]  Anne-Kristin Kaster,et al.  Methanogenic archaea: ecologically relevant differences in energy conservation , 2008, Nature Reviews Microbiology.

[22]  Benjamin K. Sovacool,et al.  Rejecting Renewables: The Socio-Technical Impediments to Renewable Electricity in the United States , 2008, Renewable Energy.

[23]  Prasant Kumar Rout,et al.  Production of first and second generation biofuels: A comprehensive review , 2010 .

[24]  Raymond Chang,et al.  Physical Chemistry for the Chemical and Biological Sciences , 2000 .