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Cellular agriculture in space

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Requirements for food production systems in space and suitability of cellular agriculture in such systems - with atom recyclability and availability of (volatile) elements through ISRU (in situ resource utilization) taken into account

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Cellular agriculture in space

  1. 1. Cellular Agriculture in Space

  2. 2. Cell-based meat (cultured meat) Muscle cells Bioreactor Culture medium Processing
  3. 3. Energy conversion efficiency < 0.1% Prospectively, Microalgae: 4~11%? “Artificial leaf”: 10%+? https://aiche.onlinelibrary.wiley.com/doi/abs/10.100 2/btpr.2941 Y.Okamoto et al. Biotech. Prog. 2019 ~4% ~35% 50~90% Unregulated Shepon, Eschel et al, IOP Science 2016 http://iopscience.iop.org/article/10.1088/17 48-9326/11/10/105002/meta
  4. 4. Cell-based meat (“synthetic meat”) in Sci-Fi Mars CellAg Farm Orbital Facility Culture vats - a Sci-Fi gadget https://seiga.nicovideo.jp/seiga/im5526417 Pub. in 1952 Pub. in 2012
  5. 5. Outlook of food in space Scenario by MRI https://www.spa cefood-x.com/ Professionals visit Many commoners liveScenario Space food Algae/insects? Space farming Professionals live Source of food ~10 people in orbit Privatization of ISS, space tourism and hotels open ~10 people on the Moon Lunar Gateway Artemis Program ~100 in orbit Space tourism streamlined Space hotels expand 30~60 on the Moon Lunar Gateway Phase 2 Construction of Moonbase 800~ in orbit Mass space tourism Moon flight route via orbit 200 on the Moon Moonbase expands Lunar tourism ~2025 ~2035 ~2045 Nutritional needs Nutritional needs Social and human purposes
  6. 6. Requirements for space food (and agriculture) Space food for limited few professionals A few professionals fly for a mission lasting up to 10 days, ~2025 Space agriculture for unspecified commoners More than 100 common people live, and several-fold more people visit for short durations, ~2045? Organoleptic acceptability ↑ More important Nutritional efficacy ↘ Desired but less important Safety for 3~5yr period ↓ Less important Launch weight ↓ Less important Waste mass ↘ Desired but less important Micro-G cooking process ↘ Remains important on the orbit, but less on the Moon Packaging mass ↓ Less important Requirements for space agriculture Facility weight ↑ Important in space, but not on land Reliability ↗ Important in space, more so than on land Material abundance ↑ Important in space, but not on land Waste recyclability ↗ Important in space, more so than on land [1] [1] Developing the NASA Food System for Long‐Duration Missions https://onlinelibrary.wiley.com/doi/full/10.1111/j.1750-3841.2010.01982.x
  7. 7. Studies at JAXA: requirements for space farms 1. Construction of farming environments 2. Establishment of life in space by sustainable agriculture Maximized recycling of materials to support life in very limited resources Biological Science in Space, Vol21 No4 2007 135-141 S.Wada https://www.jstage.jst.go.jp/article/bss/21/4/21_4_135/_article/-char/en NASA
  8. 8. “Minimal space farm” by JAXA “Minimal farm components”: Rice, sweet potato, leafy green, silkworm, salt, pond loach, soy Assuming 100 people living for 20 days... ・Plants-only diet causes deficiencies in vitamin D, vitamin B12, protein, cholesterol and fats. ・Silkworm and pond loach supply protein and fats Space Utiliz Res 26 2010 ISAS/JAXA 2010 S.Wada https://repository.exst.jaxa.jp/dspace/handle/a-is/15406
  9. 9. Launch fresh food Launch dry food Insects & fungi Cellular agriculture Algae Indoor farms They supply volatile elements and are superior in nutrition and organoleptic acceptability, but launch weight is large, supply disruption risk is high and storage durability is short and require packaging Superior in nutrition and reliability, but require algae and indoor farms for its inputs and processing is needed for organoleptic acceptability Superior in nutrition and reliability, processing is needed for organoleptic acceptability Superior in nutrition and organoleptic acceptability, but misses some nutrition. Spacefarms Superior in nutrition and organoleptic acceptability, but require algae and indoor farms for its inputs Combination of indoor farms, algae and cellular agriculture for the best outcome? Options for food in space
  10. 10. Inputs and outputs of space cellular agriculture Meat is the more desirable protein source from social well-being point of view, as culinary acceptability becomes more important in supporting large number of non-professionals settlers. Since conventional meat production methods require excessive amount of resources, alternatives are needed. Average per capita meat consumption 130g/day 200L bioreactor, 1㎡ footprint, Capacity 260g/day Inputs Amino acid 31g Glucose 63g Inputs Algae 325g https://aiche.onlinelibrary.wiley.com /doi/abs/10.1002/btpr.2941 Hydrolyzer 10㎡ footprint, 100kg/day capacity
  11. 11. Atom cycles need to be closed in space farms C Carbon P Phos- phorus N Nitrogen S Sulfur
  12. 12. “Atom cycle” in space farming ・Electrolysis of water for O2 ・CO2 absorption by alkaline water to culture spirulina and calcareous algae ・Algae in brine decomposed by thermophilic soil bacteria makes K-containing fertilizer ・Improved soil aeration removes CaCO3 and CaSO4 to avoid phosphate immobilization Biological Science in Space, Vol21 No4 2007 135-141 S. Wada Other considerations ・Cultivate morus to supply wood for habitat interior materials, silkworm for consumption ・Some plants require bees for pollination - can bees fly at 0.2atm?
  13. 13. In Situ Resource Utilization (ISRU) Setup for O2 production from Martian atmospheric CO2 Obtainable resources Water and H2 from ice in polar craters?[1] Low on essential volatiles for life, i.e. C, N “Lunar concrete” obtainable from regolith? Bases can be build around subterranean ice. Farming based on C & N (CO2 95%, N2 2%) available from atmosphere?[2] [1] https://www.pnas.org/content/115/36/8907 [2] https://www.jstage.jst.go.jp/article/bss/21/4/21_4_135/_pdf/-char/en (Extinct) comet cores - “Dirty snowball” rich in volatiles and organics can be mined? Moons and dwarf planets in outer solar system i.e. Ganymede, Europa, Pluto have icy crust and rich in water and volatiles i.e. Mars Oxygen ISRU Experiment
  14. 14. Speculative Martian biomass facility ”Nirvana Alpha”
  15. 15. Wastewater sedimentation & filtration Crust materials K,Na,ice S,P,metals Low-T Nitrogen fixation Furnace Hydrolysis Vertical farms cellular agriculture Algae culture Habitats Atmosphere CO2,N2,Ar Compression Gas tank CO2/N2 CO2/N2 Biomass Nutrients(sugars/ amino acids) N2 Nutrients (NH3) Treated wastewater Filtered sediments O2 Waste- water Biological fixation Chemical fixation Nutrients (S,P,minerals) “Nirvana Alpha” ・The facility treats waste water and produces food to fixate biologically relevant elements from minerals and atmosphere ・All materials are obtained through ISRU ・Fixation methods include chemical and biological (i.e. sulfur bacteria) ・Wastewater treatment mainly includes sedimentation and filtration ・Filtered sediments can be sintered for construction materials. Speculative system diagram for a Martian facility Biomass & food
  16. 16. Speculative plutonian biomass facility ”Hadean Orgamass”
  17. 17. 70℃ 25℃ Heat exchanger High-T steam turbine Low-T steam turbine Nitrogen gas turbine Crust material ice, CO2, CH4, N2 Generator Nitrogen gas High-T steam Low-T steam N2 gas water CO2 NH3 Impurity Electro-l ysis Low-T Nitrogen fixation Hydrogen reforma- tion Vertical farms cellular agriculture Hydrogen bacteria CH4 Impurity Amino acids O2 H2CO2NH3 Sugars Liquid-N2 condenser Rocky waste Biomass & food Ice, dryice ・Nuclear powered plutonian biomass production facility feeding on crust materials ・Nuclear power at near 100% Carnot heat efficiency using near absolute zero heat sink・Liquid nitrogen combined cycle power ・100% on in situ resource utilization ・Replacement of some bioprocesses with chemical synthesis Reactorcore Algae culture Speculative system diagram for a Plutonian facility
  18. 18. Summary ・Long-term shift from space food to space farming ・There is a preceding literature on a space farming scheme that takes atom cycle into account ・A combination of indoor farms, algae and cellular agriculture fulfills the requirements for space-based food production system? ・An input of 325g/(day-person) of algae is required to produce 130g/(day-person) of cell-based meat. ・ISRU depends on the location and so are the designs of space farming facilities.

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