a very crappy rocket engine

[Nuke]

1 minute ago, FleshJeb said:

I'm just disappointed that none of you have said, "ISPeeeeeeee" yet.

you need the pee to make the oxidizer.

[FleshJeb]

21 minutes ago, Nuke said:

you need the pee to make the oxidizer.

Well, now I have a more socially acceptable response for why it burns when I pee...

[StrandedonEarth]

2 hours ago, FleshJeb said:

Well, now I have a more socially acceptable response for why it burns when I pee...

*steps away *

[wumpus]

2 hours ago, FleshJeb said:

Well, now I have a more socially acceptable response for why it burns when I pee...

That's not required to make potassium nitrate anymore...

[kerbiloid]

Too many nitrates in vegetables and sausages.

[Selective Genius]

Ugh you guys are disgusting

Anyhow, there are anaerobic bio-mass digestors at rural and semi-urban areas in my country which mainly decomposes wastes from farm, or ideally, cow dung-water slurry, to produce biogas (CO2 + CH4) and sludge. This are not complex to build, since almost every rural community has a few of those.

These generators could easily be adapted to process human waste to biogas, and further refining would get us the methane we need and redirect the CO2 to the greenhouses. The leftover sludge, can be used as an EXCELLENT manure for the greenhouses. Or we could use the biogas as a monoprop for station keeping.

[catloaf]

On 7/2/2020 at 7:53 AM, sevenperforce said:

You could also have them cram all their poo into a bag and use the Canadarm to fling it retrograde. Probably wouldn't move very fast but hey, that's impulse.

Or you could use said crappy srb's to fling it to escape velocity Danny2462 style.

1 hour ago, Selective Genius said:

Ugh you guys are disgusting

Anyhow, there are anaerobic bio-mass digestors at rural and semi-urban areas in my country which mainly decomposes wastes from farm, or ideally, cow dung-water slurry, to produce biogas (CO2 + CH4) and sludge. This are not complex to build, since almost every rural community has a few of those.

These generators could easily be adapted to process human waste to biogas, and further refining would get us the methane we need and redirect the CO2 to the greenhouses. The leftover sludge, can be used as an EXCELLENT manure for the greenhouses. Or we could use the biogas as a monoprop for station keeping.

Wait a sec. Can't co2 be use as oxidizer, because if it can poo starship is official. Actually, with this method how many astronauts would it take to run 1 raptor engine?

Edited July 11, 2020 by catloaf

[K^2]

1 hour ago, catloaf said:

Can't co2 be use as oxidizer

No. Certainly not with anything organic. Carbon is even used to strip oxygen from metals - e.g. see how copper is smelted from malachite. There might be some fuels out there that you can oxidize with carbon dioxide, but they aren't anything that's going to be practical. And having either reduced carbon or carbon monoxide as part of your exhaust isn't going to be great either.

[catloaf]

2 minutes ago, K^2 said:

No. Certainly not with anything organic. Carbon is even used to strip oxygen from metals - e.g. see how copper is smelted from malachite. There might be some fuels out there that you can oxidize with carbon dioxide, but they aren't anything that's going to be practical. And having either reduced carbon or carbon monoxide as part of your exhaust isn't going to be great either.

Oh, silly me. I knew it was too good to be true! (We really need a facepalm emoticon.)

Edited July 11, 2020 by catloaf

[StrandedonEarth]

8 hours ago, catloaf said:

(We really need a facepalm emoticon.)

We have faceboard!