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Puft farming - not enough polluted oxygen


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I've been struggling to farm pufts.  I thought placing them over a lake of polluted water would supply them with enough polluted oxygen to survive, but it doesn't.  I just read on the wiki that the polluted water only turns into polluted oxygen if it is in contact with either oxygen or polluted oxygen.  Since water sinks, you have to put it in a low lying area, but so does carbon dioxide, which smothers the water and stops it from evaporating.  How are you supposed to stop that from happening?

 

 

1 hour ago, psusi said:

I just read on the wiki that the polluted water only turns into polluted oxygen if it is in contact with either oxygen or polluted oxygen.

 

Wait. Is this true? I just read on the wiki that polluted water will turn any gas that its in contact with to polluted oxygen. Which presumably includes CO2, and also useful germ-killing Chlorine?

3 minutes ago, Jumpp said:

Wait. Is this true? I just read on the wiki that polluted water will turn any gas that its in contact with to polluted oxygen. Which presumably includes CO2, and also useful germ-killing Chlorine?

It will not. The polluted water will evaporate (adding gas) only if it is oxygen or polluted oxygen that is touching the polluted water. If it is CO2 or chlorine, the polluted water will not evaporate at all. It will never convert any gas into PO2.

Very cool.

That setup is interesting. I'd expect the CO2 to sometimes get lodged in the airflow tile layer. But now that I think about it, I'm not 100% certain that that's a thing--I've never looked. Does gas pass from one side of an airflow tile to the other without ever being on/in it?

Just now, Jumpp said:

Very cool.

That setup is interesting. I'd expect the CO2 to sometimes get lodged in the airflow tile layer. But now that I think about it, I'm not 100% certain that that's a thing--I've never looked. Does gas pass from one side of an airflow tile to the other without ever being on/in it?

That's exactly what I was thinking.

Also the tile means when they poop algae, it starts evaporating back into polluted oxygen instead of being contained under water.

 

Also why does any polluted water ever evaporate?  Shouldn't it always be covered in co2?

 

1 minute ago, Neotuck said:

I find that morbs produces more PO2 than Pwater for puft ranching

work on spawning morbs first (about 4 per puft)

I may need to try that now but I'm out of dirt.  I did find a wild morb and built a critter drop off to try to auto-wrangle it but the drop-off doesn't recognize there being any critters in the room, which seems like a bug.

 

2 minutes ago, psusi said:

I may need to try that now but I'm out of dirt.  I did find a wild morb and built a critter drop off to try to auto-wrangle it but the drop-off doesn't recognize there being any critters in the room, which seems like a bug.

Morbs can't be wrangled, you need to use critter traps to move them

17 minutes ago, Christophlette said:

It will not. The polluted water will evaporate (adding gas) only if it is oxygen or polluted oxygen that is touching the polluted water. If it is CO2 or chlorine, the polluted water will not evaporate at all. It will never convert any gas into PO2.

Is this a recent change?  I haven't played in the Expression Upgrade yet, but before that I was always seeing bits of polluted oxygen floating up through the carbon dioxide from pools of polluted water.  Unless the carbon dioxide was over 1800 grams, then the pools would stop off gassing.

5 minutes ago, Albryant said:

Is this a recent change?  I haven't played in the Expression Upgrade yet, but before that I was always seeing bits of polluted oxygen floating up through the carbon dioxide from pools of polluted water.  Unless the carbon dioxide was over 1800 grams, then the pools would stop off gassing.

When checking in the test save and the wiki to be sure, you are right. I was just assuming the author was right and explained a way to solve his problem has it was.

And Psusi is right that slime will evaporate too. And that is a problem... You can remove the airflow tiles. The pool will stay the same. In fact, you didn't have any problem at the start ^^

4 minutes ago, psusi said:

Without the airflow tiles then don't you have a 1 tile deep pocket of carbon dioxide floating on top of the water, stopping it from evaporating?

 

If you get rid of the insulated tile that's at the same height as the airflow tiles, the scrubber would dispose of all the CO2.

 

1 hour ago, psusi said:

I did find a wild morb and built a critter drop off to try to auto-wrangle it but the drop-off doesn't recognize there being any critters in the room, which seems like a bug.

Do a morb farm and you will have enough PO2 for all your pufts and your Duplicants. ;)

morbs.thumb.png.1585c2b021f155f55d59f943ab41dd0e.png

3 hours ago, psusi said:

I just read on the wiki that the polluted water only turns into polluted oxygen if it is in contact with either oxygen or polluted oxygen.

Wiki is incredibly outdated about many things. Mostly because people say it's bad and ignore it instead of updating it to make it not-bad.

Nowadays polluted water offgasses in all gases, as long as it has a gas tile with less than 1800g mass above it.

If you want a morb / pump free puftranch.

You can Make a Stable that is 50% filled with pWater and 50% pOxygen by making the groom+dropoff on a meshtile, otherwise building a 2 high stable inside a waterlock after a exosuit dock.

Offgassing Will Be enough to Feed all pufts but you will need hydro sensors & liquid shutoffs to top up the liquid to near 950, but not over 1000kg.

Since its the top liquid tile that offgasses you want to avoid going above 1000kg/tile.

17 hours ago, Coolthulhu said:

Wiki is incredibly outdated about many things. Mostly because people say it's bad and ignore it instead of updating it to make it not-bad.

Nowadays polluted water offgasses in all gases, as long as it has a gas tile with less than 1800g mass above it.

Just tested this last night by making a large chamber and filling it about two tiles deep in PH20 with a tall column of 1kg/tile Chlorine gas above. Very quickly, like within a cycle, a significant fraction of the gas in the chamber was PO2. It's not clear to me how much of the PO2 was converted Chlorine gas and how much was converted PH2O. Next time I'll use a smaller chamber to make such measurements easier.

Then I don't understand why my pool about 8 tiles wide of pwater wasn't making enough po2 to feed one or two pufts.  I started storing slime in a box in the room above the water so it would also evaporate and suddenly I have tons of po2.

 

Do morbs not have to eat anything?  Just stuff up a toilet and let them keep spawning and making po2 forever?

 

I made some calculations for PH2O evaporation and you need 12.5 tiles of PH2O evaporating to feet only 1 puft. So it's not really doable in my opinion... Or you need it to be industrial...

8 minutes ago, psusi said:

Do morbs not have to eat anything?  Just stuff up a toilet and let them keep spawning and making po2 forever?

Yes they don't eat and produce PO2 forever. But you must keep the pressure below 1000g so they keep producing. And morbs produce slimelung germs in the PO2 they produce. Although you need in between 4 to 5 morbs per puft to feed them at 100%.

31 minutes ago, psusi said:

Then I don't understand why my pool about 8 tiles wide of pwater wasn't making enough po2 to feed one or two pufts.  I started storing slime in a box in the room above the water so it would also evaporate and suddenly I have tons of po2.

I suppose it'd depend on the mechanism by which the PO2 is getting produced. If it's mostly the PH2O evaporating (which I doubt) then I can't explain what you saw. If, however, the PH2O is converting gas above it into PO2, then I'd speculate that your pufts very quickly ate all the available gas and there was little left to convert. The gas pressure when I observed very fast PO2 production was around 1kg/tile. Were you pumping gas in?

13 minutes ago, psusi said:

I'm confused.  Does it convert existing gas to PO2 or does it create new PO2?  I thought it was the latter.  I wasn't pumping any gas in.

 

PH2O evaporates to create PO2. So there is no converting at all.

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