https://marspedia.org/index.php?title=Nuclear_food_cycle&feed=atom&action=historyNuclear food cycle - Revision history2024-03-29T14:13:05ZRevision history for this page on the wikiMediaWiki 1.34.2https://marspedia.org/index.php?title=Nuclear_food_cycle&diff=140186&oldid=prevMichel Lamontagne: /* Energy analysis */2023-08-14T20:03:14Z<p><span dir="auto"><span class="autocomment">Energy analysis</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 20:03, 14 August 2023</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>From animal studies, the nutritional value of ''[[w:Methylococcus_capsulatus|Methylococcus capsulatus]]'' is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy. (about 7% with the methanol conversion efficiency).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>From animal studies, the nutritional value of ''[[w:Methylococcus_capsulatus|Methylococcus capsulatus]]'' is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy. (about 7% with the methanol conversion efficiency).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The bacteria would probably be used as animal feed, reducing <del class="diffchange diffchange-inline">somewhat </del>the energy efficiency of the process.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The bacteria would probably be used as animal feed, reducing <ins class="diffchange diffchange-inline">significantly </ins>the energy efficiency of the process<ins class="diffchange diffchange-inline">, as the feed conversion ratio for meat is less than one</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.</div></td></tr>
</table>Michel Lamontagnehttps://marspedia.org/index.php?title=Nuclear_food_cycle&diff=137875&oldid=prevMichel Lamontagne: /* Energy analysis */2021-06-03T15:51:15Z<p><span dir="auto"><span class="autocomment">Energy analysis</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 15:51, 3 June 2021</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8" >Line 8:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>From animal studies, the nutritional value of ''[[w:Methylococcus_capsulatus|Methylococcus capsulatus]]'' is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy. (about 7% with the methanol conversion efficiency).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>From animal studies, the nutritional value of ''[[w:Methylococcus_capsulatus|Methylococcus capsulatus]]'' is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy. (about 7% with the methanol conversion efficiency).</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The bacteria would probably be used as animal feed, reducing somewhat the energy efficiency of the process.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.</div></td></tr>
</table>Michel Lamontagnehttps://marspedia.org/index.php?title=Nuclear_food_cycle&diff=137874&oldid=prevMichel Lamontagne: /* Energy analysis */2021-06-03T15:48:16Z<p><span dir="auto"><span class="autocomment">Energy analysis</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 15:48, 3 June 2021</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The nuclear [[food]] cycle is a hypothetical food cycle based upon [[Bioreactor#Methanotrophs|methanotrophs]] which are fed on [[methanol]] produced in [[Nuclear_power|nuclear]] powered [[Sabatier_process|sabatier]] reactors, which are in turn fed on [[syngas]] produced from nuclear powered Zinc/Sulfur/Iodine<ref>https://doi.org/10.1016/j.ijhydene.2015.11.049</ref> reactors. Another product produced by the Zn/S/I reactor is breathable [[oxygen|O<sub>2</sub>]]. This then forms a loop, where people eat the methanotrophs, producing [[Carbon_dioxide|CO<sub>2</sub>]] and [[Hydrogen|H<sub>2</sub>O]] through their metabolism, which are extracted via [[atmospheric processing]] and [[Potable_water_treatment|water recycling]], processed to produce [[methanol]] which is then fed back to the methanotrophs to grow more food.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The nuclear [[food]] cycle is a hypothetical food cycle based upon [[Bioreactor#Methanotrophs|methanotrophs]] which are fed on [[methanol]] produced in [[Nuclear_power|nuclear]] powered [[Sabatier_process|sabatier]] reactors, which are in turn fed on [[syngas]] produced from nuclear powered Zinc/Sulfur/Iodine<ref>https://doi.org/10.1016/j.ijhydene.2015.11.049</ref> reactors. Another product produced by the Zn/S/I reactor is breathable [[oxygen|O<sub>2</sub>]]. This then forms a loop, where people eat the methanotrophs, producing [[Carbon_dioxide|CO<sub>2</sub>]] and [[Hydrogen|H<sub>2</sub>O]] through their metabolism, which are extracted via [[atmospheric processing]] and [[Potable_water_treatment|water recycling]], processed to produce [[methanol]] which is then fed back to the methanotrophs to grow more food.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>== Energy analysis ==</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Energy analysis==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This analysis assumes that nutrients ([[nitrogen]], [[sulfur]], [[phosphorus]], etc.) are entirely recycled, in practice due to imperfect recycling or colony growth, small amounts of additional nutrients would need to be added periodically from [[mining]], [[atmospheric processing]], etc.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This analysis assumes that nutrients ([[nitrogen]], [[sulfur]], [[phosphorus]], etc.) are entirely recycled, in practice due to imperfect recycling or colony growth, small amounts of additional nutrients would need to be added periodically from [[mining]], [[atmospheric processing]], etc.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The growth yields of methanotrophs varies considerably<ref>http://methanotroph.org/wiki/performance-and-yield/</ref><ref>https://www.che.psu.edu/faculty/wood/group/publications/pdf/Assessing%20methanotrophy%20and%20carbon%20fixation%20M.%20a.%20Microb%20Cell%20Factor%202016%20Maranas.pdf</ref><ref>https://www.doi.org/10.1007/BF02346062</ref>, but somewhere around 10-40% of the methanol used ends up as cellular mass. Methanol has an energy density of 15.6 MJ/L and a density of 792g/L<ref>https://en.wikipedia.org/wiki/Methanol</ref>. That works out to be 20 KJ per gram of methanol. Taking 20% yield as an approximation, that leads to 100KJ/g of cell mass assuming the methanol production process is 100% efficient. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The growth yields of methanotrophs varies considerably<ref>http://methanotroph.org/wiki/performance-and-yield/</ref><ref>https://www.che.psu.edu/faculty/wood/group/publications/pdf/Assessing%20methanotrophy%20and%20carbon%20fixation%20M.%20a.%20Microb%20Cell%20Factor%202016%20Maranas.pdf</ref><ref>https://www.doi.org/10.1007/BF02346062</ref>, but somewhere around 10-40% of the methanol used ends up as cellular mass. Methanol has an energy density of 15.6 MJ/L and a density of 792g/L<ref>https://en.wikipedia.org/wiki/Methanol</ref>. That works out to be 20 KJ per gram of methanol. Taking 20% yield as an approximation, that leads to 100KJ/g of cell mass assuming the methanol production process is 100% efficient. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>From animal studies, the nutritional value of [<del class="diffchange diffchange-inline">https</del>:<del class="diffchange diffchange-inline">//en.wikipedia.org/wiki/</del>Methylococcus_capsulatus|<del class="diffchange diffchange-inline">''</del>Methylococcus capsulatus''<del class="diffchange diffchange-inline">] </del>is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">As methanol production is at best 70% efficient in the current state of things, the yield might correspond to about 140 MJ/kg (to be verified). </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>From animal studies, the nutritional value of <ins class="diffchange diffchange-inline">''[</ins>[<ins class="diffchange diffchange-inline">w</ins>:Methylococcus_capsulatus|Methylococcus capsulatus<ins class="diffchange diffchange-inline">]]</ins>'' is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy<ins class="diffchange diffchange-inline">. (about 7% with the methanol conversion efficiency)</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>== Further analysis ==</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Further analysis==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The actual growth media is going to be [[Waste_biomass_recycling|recycled biomass]], which may contain undigested food or more complex proteins that require additional energy for catabolism. </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The actual efficiency of small [[Sabatier_process|sabatier]] or Zn/S/I reactors is currently unknown.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>*The actual growth media is going to be [[Waste_biomass_recycling|recycled biomass]], which may contain undigested food or more complex proteins that require additional energy for catabolism.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Radiotrophic fungi have been observed<ref>https://ddd.uab.cat/pub/tfg/2014/126266/TFG_danielantoniovazquezsanchez.pdf</ref>, which may be able to more directly exploit nuclear energy.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>*The actual efficiency of small [[Sabatier_process|sabatier]] or Zn/S/I reactors is currently unknown.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>*Radiotrophic fungi have been observed<ref>https://ddd.uab.cat/pub/tfg/2014/126266/TFG_danielantoniovazquezsanchez.pdf</ref>, which may be able to more directly exploit nuclear energy.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references /></div></td></tr>
</table>Michel Lamontagnehttps://marspedia.org/index.php?title=Nuclear_food_cycle&diff=136214&oldid=prevMultivac: /* Further analysis */2020-07-27T12:48:37Z<p><span dir="auto"><span class="autocomment">Further analysis</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 12:48, 27 July 2020</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Further analysis ==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Further analysis ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The actual growth media is going to be [[Waste_biomass_recycling|recycled biomass]], which may contain undigested food or more complex proteins that require additional energy for catabolism. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The actual growth media is going to be [[Waste_biomass_recycling|recycled biomass]], which may contain undigested food or more complex proteins that require additional energy for catabolism. </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The actual efficiency of small [[Sabatier_process|sabatier]] or Zn/S/I reactors is currently unknown</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* The actual efficiency of small [[Sabatier_process|sabatier]] or Zn/S/I reactors is currently unknown<ins class="diffchange diffchange-inline">.</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">* Radiotrophic fungi have been observed<ref>https://ddd.uab.cat/pub/tfg/2014/126266/TFG_danielantoniovazquezsanchez.pdf</ref>, which may be able to more directly exploit nuclear energy.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references /></div></td></tr>
</table>Multivachttps://marspedia.org/index.php?title=Nuclear_food_cycle&diff=136212&oldid=prevMultivac: Created page with "The nuclear food cycle is a hypothetical food cycle based upon methanotrophs which are fed on methanol produced in Nuclear_power|nuclear..."2020-07-27T12:36:05Z<p>Created page with "The nuclear <a href="/Food" title="Food">food</a> cycle is a hypothetical food cycle based upon <a href="/Bioreactor#Methanotrophs" class="mw-redirect" title="Bioreactor">methanotrophs</a> which are fed on <a href="/Methanol" title="Methanol">methanol</a> produced in Nuclear_power|nuclear..."</p>
<p><b>New page</b></p><div>The nuclear [[food]] cycle is a hypothetical food cycle based upon [[Bioreactor#Methanotrophs|methanotrophs]] which are fed on [[methanol]] produced in [[Nuclear_power|nuclear]] powered [[Sabatier_process|sabatier]] reactors, which are in turn fed on [[syngas]] produced from nuclear powered Zinc/Sulfur/Iodine<ref>https://doi.org/10.1016/j.ijhydene.2015.11.049</ref> reactors. Another product produced by the Zn/S/I reactor is breathable [[oxygen|O<sub>2</sub>]]. This then forms a loop, where people eat the methanotrophs, producing [[Carbon_dioxide|CO<sub>2</sub>]] and [[Hydrogen|H<sub>2</sub>O]] through their metabolism, which are extracted via [[atmospheric processing]] and [[Potable_water_treatment|water recycling]], processed to produce [[methanol]] which is then fed back to the methanotrophs to grow more food.<br />
== Energy analysis ==<br />
This analysis assumes that nutrients ([[nitrogen]], [[sulfur]], [[phosphorus]], etc.) are entirely recycled, in practice due to imperfect recycling or colony growth, small amounts of additional nutrients would need to be added periodically from [[mining]], [[atmospheric processing]], etc.<br />
<br />
The growth yields of methanotrophs varies considerably<ref>http://methanotroph.org/wiki/performance-and-yield/</ref><ref>https://www.che.psu.edu/faculty/wood/group/publications/pdf/Assessing%20methanotrophy%20and%20carbon%20fixation%20M.%20a.%20Microb%20Cell%20Factor%202016%20Maranas.pdf</ref><ref>https://www.doi.org/10.1007/BF02346062</ref>, but somewhere around 10-40% of the methanol used ends up as cellular mass. Methanol has an energy density of 15.6 MJ/L and a density of 792g/L<ref>https://en.wikipedia.org/wiki/Methanol</ref>. That works out to be 20 KJ per gram of methanol. Taking 20% yield as an approximation, that leads to 100KJ/g of cell mass assuming the methanol production process is 100% efficient. <br />
<br />
From animal studies, the nutritional value of [https://en.wikipedia.org/wiki/Methylococcus_capsulatus|''Methylococcus capsulatus''] is 8.96 MJ/kg<ref>https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_other-23.pdf</ref>, making the cycle 8.9% efficient at converting thermal energy into nutritional energy.<br />
<br />
1kg of <sup>235</sup>U contains 8.64×10<sup>13</sup> joules of energy. The average adult needs approximately 8700kj/day. That means that 1kg uranium could be converted to approximately 850,000 person days of food. Assuming that a molten salt [[Nuclear_power|reactor]] that can almost completely consume its nuclear fuel is utilized. In other words, feeding a person using the nuclear food cycle requires approximately an extra 1kw<sub>th</sub> per person.<br />
<br />
== Further analysis ==<br />
* The actual growth media is going to be [[Waste_biomass_recycling|recycled biomass]], which may contain undigested food or more complex proteins that require additional energy for catabolism. <br />
* The actual efficiency of small [[Sabatier_process|sabatier]] or Zn/S/I reactors is currently unknown<br />
<br />
==References==<br />
<references /></div>Multivac