Brainstorming session

The most energy-efficient method to produce food for people

Image credit: Umberto Salvagnin / flickr

Darko Savic Aug 26, 2020

Can we come up with the most energy and resource-efficient nutrient production method that could be applied on an industrial scale? We will need it if we are going to feed ourselves:
in enclosed habitats during space travel
colonizing other planets
extreme conditions on earth (expanding deserts, frozen lands)
overpopulation on earth
With space-exploration but also global warming and overpopulation upon us, now might be the time to master the production of essential nutrients in enclosed systems.

Our waste production should be factored in (converted back to nutrients)

food production space exploration

Creative contributions

Choice of microbial species to convert waste to food directly

Darko Savic Aug 26, 2020

Professor Christopher House's lab is working on waste treatment via anaerobic digestion followed by methanotrophic growth of Methylococcus capsulatus to produce a Vegemite-tasting protein/lipid-rich biomass that can be directly consumed. Alternatively, it could be used to feed other nutrient producing species. They built and tested a fixed-film, flow-through, anaerobic reactor to treat the wastewater.
During steady-state operation, the reactor achieved a 97% chemical oxygen demand (COD) removal rate with an organic loading rate of 1740 g d-1 m-3 and a hydraulic retention time of 12.25 d.
They tested the nutritional content: The M. capsulatus biomass consisted of 52% protein and 36% lipids, the H. desiderata biomass consisted of 15% protein and 7% lipids, and the Thermus aquaticus biomass consisted of 61% protein and 16% lipids.
Professor House says “It’s a little strange, but the concept would be a little bit like Marmite or Vegemite, where you’re eating a smear of ‘microbial goo’.”
Could the above species be genetically engineered to produce all the essential nutrients we need? Could something be done about the vegemite taste?:)

[1]Steinberg LM, Kronyak RE, House CH. Coupling of anaerobic waste treatment to produce protein- and lipid-rich bacterial biomass. Life Sci Space Res (Amst). 2017;15:32-42. doi:10.1016/j.lssr.2017.07.006

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ByDarko Savic

Can we design a fully self-sustaining enclosed habitat for people?

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What would be a good secondary purpose for SpaceX Starlink satellite constellation?

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The most energy-efficient method to produce food for people

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Choice of microbial species to convert waste to food directly

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General comments

ByDarko Savic

Can we design a fully self-sustaining enclosed habitat for people?

ByDarko Savic

What would be a good secondary purpose for SpaceX Starlink satellite constellation?

The most energy-efficient method to produce food for people

Creative contributions

Choice of microbial species to convert waste to food directly

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General comments

ByDarko Savic

Can we design a fully self-sustaining enclosed habitat for people?

ByDarko Savic

What would be a good secondary purpose for SpaceX Starlink satellite constellation?

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