Greg et al., A few weeks ago, I explored the use of *Cupriavidus metallidurans*<http://en.wikipedia.org/wiki/Ralstonia_eutrophus> * *with the Arctic methane groups. Insulated bioreactors would make this species useful in the Arctic ebullition fields. Also, I believe non Arctic marine based systems, such as OMEGA, could exploit this species for a co CO2/CH4 capture. Below is the text of the exploritory email: "It may be possible to construct a continuous incubator for the production of *Cupriavidus metallidurans <http://en.wikipedia.org/wiki/Ralstonia_eutrophus> *which is a feed stock for *Polyhydroxybutyrate* <http://en.wikipedia.org/wiki/Polyhydroxybutyrate>. This may help partially address the critical issue of Arctic methane releases in areas of high ebullition. Of the many things I like about *C. metallidurans*, it is non pathogenic and is a lithotroph. The first makes working with it easy and the second makes it sympathetic to the use of *olivine*<http://en.wikipedia.org/wiki/Olivine>as the mineral source. It is a *mesophile.* <http://en.wikipedia.org/wiki/Mesophile> However, an incubator can compensate for Arctic temperatures. Here is the article which started me down this line of thought:* How Methane-Sourced Polymers Could Save the World*<http://engineering.stanford.edu/news/how-methane-sourced-polymers-could-save-world> . In past posts concerning concepts relitive to the *Arctic Methane Tipping Point*<http://thinkprogress.org/climate/2013/06/13/2138531/nasa-finds-amazing-levels-of-arctic-methane-and-co2-asks-is-a-sleeping-climate-giant-stirring-in-the-arctic/?mobile=nc>and *Arctic Sea Ice Loss*<http://www.guardian.co.uk/environment/2013/mar/25/frozen-spring-arctic-sea-ice-loss>, I've proposed creating multi-use Arctic sea platforms using *Shaf Downwellers * <https://www.dropbox.com/sh/c852tpue32fr5iy/nQDRPbSO_p> as the main structure. In the proposal I mentioned the possibility of incorporating wave energy conversion through in-flow turbines within the down flow, water spraying for ice enhancement and aerobic *methanotroph*<http://en.wikipedia.org/wiki/Methanotroph>continuous incubators to help reduce desolved methane in the sea water. The use of *C. metallidurans *continuous incubators over the high ebullition methane fields of the *ESAS*<http://en.wikipedia.org/wiki/East_Siberian_Sea>, to produce feed stock for polyhydroxybutyrate production, seems to make sense to me and they can be fitted into the overall design. This type of *mariculture* <http://en.wikipedia.org/wiki/Mariculture> may help offset the cost of Arctic methane mitigation. If you have time, please let me know if I've failed to properly connect the dots on this idea. I'll put some work into the technical side to help show what a 'continuous incubator' mounted to a Shaf Downweller may look like.". Best, Michael
On Tuesday, August 13, 2013 10:01:07 AM UTC-7, Greg Rau wrote: > Sorry if this is old news, but in cleaning out my in box I came across > this interesting 2012 paper – anaerobic methane oxidation also consumes > CO2. So with a bit of biogeoengineering we can pro-actively mitigate CH4 > and CO2 simultaneously, +/- take the lipid-rich biomass to produce > biofuels, supplanting fossil sources??? > Greg > > > > *Autotrophy as a predominant mode of carbon fixation in anaerobic > methane-oxidizing microbial communities* > > 1. Matthias Y. > Kellermann<http://www.pnas.org/search?author1=Matthias+Y.+Kellermann&sortspec=date&submit=Submit> > a > <http://www.pnas.org/content/109/47/19321.full#aff-1>,1<http://www.pnas.org/content/109/47/19321.full#fn-3> > ,2 > <http://www.pnas.org/content/109/47/19321.full#fn-4>,3<http://www.pnas.org/content/109/47/19321.full#corresp-1>, > > > 2. Gunter > Wegener<http://www.pnas.org/search?author1=Gunter+Wegener&sortspec=date&submit=Submit> > b > <http://www.pnas.org/content/109/47/19321.full#aff-2>,c<http://www.pnas.org/content/109/47/19321.full#aff-3> > ,1 <http://www.pnas.org/content/109/47/19321.full#fn-3>, > 3. Marcus > Elvert<http://www.pnas.org/search?author1=Marcus+Elvert&sortspec=date&submit=Submit> > a <http://www.pnas.org/content/109/47/19321.full#aff-1>, > 4. Marcos Yukio > Yoshinaga<http://www.pnas.org/search?author1=Marcos+Yukio+Yoshinaga&sortspec=date&submit=Submit> > a <http://www.pnas.org/content/109/47/19321.full#aff-1>, > 5. Yu-Shih > Lin<http://www.pnas.org/search?author1=Yu-Shih+Lin&sortspec=date&submit=Submit> > a <http://www.pnas.org/content/109/47/19321.full#aff-1>, > 6. Thomas > Holler<http://www.pnas.org/search?author1=Thomas+Holler&sortspec=date&submit=Submit> > c <http://www.pnas.org/content/109/47/19321.full#aff-3>, > 7. Xavier Prieto > Mollar<http://www.pnas.org/search?author1=Xavier+Prieto+Mollar&sortspec=date&submit=Submit> > a <http://www.pnas.org/content/109/47/19321.full#aff-1>, > 8. Katrin > Knittel<http://www.pnas.org/search?author1=Katrin+Knittel&sortspec=date&submit=Submit> > c <http://www.pnas.org/content/109/47/19321.full#aff-3>, and > 9. Kai-Uwe > Hinrichs<http://www.pnas.org/search?author1=Kai-Uwe+Hinrichs&sortspec=date&submit=Submit> > a <http://www.pnas.org/content/109/47/19321.full#aff-1> > > + <http://www.pnas.org/content/109/47/19321.full> Author Affiliations > 1. aOrganic Geochemistry Group, MARUM-Center for Marine Environmental > Sciences and Department of Geosciences, University of Bremen, D-28359 > Bremen, Germany; 2. bAlfred Wegener Institute for Polar and Marine > Research, Research Group for Deep Sea Ecology and Technology, D-27515 > Bremerhaven, Germany; and 3. cMax Planck Institute for Marine > Microbiology, D-28359 Bremen, Germany > > 1. Edited by Donald E. Canfield, University of Southern Denmark, > Odense M, Denmark, and approved October 5, 2012 (received for review May > 24, 2012) > > > > Next Section <http://www.pnas.org/content/109/47/19321.full#sec-1> > Abstract > > The methane-rich, hydrothermally heated sediments of the Guaymas Basin are > inhabited by thermophilic microorganisms, including anaerobic > methane-oxidizing archaea (mainly ANME-1) and sulfate-reducing bacteria > (e.g., HotSeep-1 cluster). We studied the microbial carbon flow in ANME-1/ > HotSeep-1 enrichments in stable-isotope–probing experiments with and > without methane. The relative incorporation of 13C from either dissolved > inorganic carbon or methane into lipids revealed that methane-oxidizing > archaea assimilated primarily inorganic carbon. This assimilation is > strongly accelerated in the presence of methane. Experiments with > simultaneous amendments of both 13C-labeled dissolved inorganic carbon > and deuterated water provided further insights into production rates of > individual lipids derived from members of the methane-oxidizing community > as well as their carbon sources used for lipid biosynthesis. In the > presence of methane, all prominent lipids carried a dual isotopic signal > indicative of their origin from primarily autotrophic microbes. In the > absence of methane, archaeal lipid production ceased and bacterial lipid > production dropped by 90%; the lipids produced by the residual fraction of > the metabolically active bacterial community predominantly carried a > heterotrophic signal. Collectively our results strongly suggest that the > studied ANME-1 archaea oxidize methane but assimilate inorganic carbon and > should thus be classified as methane-oxidizing chemoorganoautotrophs. > > > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out.
