Re: [DIYbio] Re: How difficult would it be to make a super food?

Again, this is ideally, but you could create a closed loop system where bacteria feed on high density polymers, then the bacteria are used to feed humans and plants, the plants are then used to feed humans and fungi, and then the fungi are finally eaten and the feces from the humans can be used to supplement the growth of the bacteria.

I haven't done all the mass balance equations, but the theory is there.

-SG

On Thu, Apr 12, 2018 at 8:22 AM Cory J. Geesaman <cory@geesaman.com> wrote:
The original question was more in the context of "an ice age sets in and you only have frozen trees you dig out to use for fuel" (though that wasn't stated in any way, that's why I picked mushrooms.)  The space aspect is interesting though - maybe start making wooden cargo rockets so that nearly everything which makes it to space can be turned into food?  Any idea of the average percentage of weight of the vessel itself in orbit?  (That is, not the cargo weight?)


On Thursday, April 12, 2018 at 5:51:05 AM UTC-4, John Griessen wrote:
On 04/11/2018 10:24 PM, Daniel C. wrote:
> where everything has to be launched in the first place, why bother converting it from X to Y via a biological system when you
> could just launch Y?

There's always the case of being in a limited closed system for the near term.  So in that setting you have many byproducts
available as growing media that have degraded from their "new state" to some used condition after already having the launch energy
spent.
They are free by comparison to restocking anything not yet launched.  The fraction of weight left over after a launch to orbit is
something like .2%.  Another way to look at it is to price things by weight -- launched to orbit costs:

Atlas V                 $20.2k/kg     as of 2015
Falcon Heavy                 $17k/kg  as of 2016
Soyuz FG                 $7.2k/kg     as of ?
SpaceX Falcon-9         $2.7k/kg  as of 2016
SpaceX Falcon-9 re-used $1.9k/kg  as of 2017
SpaceX planned BFR          $75/kg  future ??

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