Aquilo needs an Ammonia sink/void recycle method.

[Gloweye]

With the recent change of the rocket fuel recipe on Aquilo (122574), we have lost the ability to efficiently dump ammonia.

Either you have to spend crude oil to make solid fuel, or you're forced to use the extremely inefficient Ice Platform recycling.

The following math assumes no quality and no modules.

Separation generates 10 Ammonia for every 1 ice. An ice platform craft+recycle voids 400 Ammonia and 37.5 Ice, meaning that you have 2.5 ice yield on average. This costs 30 seconds of crafting time. If the intent is to melt ice to water for heating tower power generation, it generates 50 water resulting in 500 steam, completely ignoring the cost of heat and melting the ice itself.

This is enough to generate 48 MJ of energy.

Assuming no modules, the required spending for this is the following:
Ice Platform crafting: 30 seconds (base craft time) * 387.5 (T3 assembler energy cost) / 1.25 (T3 assembler work rate) = 9300 kJ = 9.3 MJ
Recycler time: 1.875 (ice platform recycler base craft time) * 192 (Recycler energy cost) / 0.5 (recycler work rate) = 720 kJ = 0.7 MJ
(I will use a chemical plant for the seperation, as it is more energy efficient)
Ammonia Seperation: 8 (total crafts required to generate 40 ice / 400 ammonia) * 1 (base craft time) * 217 (Chemical Plant energy cost) / 1 (chemical plant work rate) = 1736 kJ = 1.7 MJ

So to generate enough water for 48 MJ of energy, we need to spend 11.756 MJ - almost a quarter of our yield.

If setting up the water and rocket fuel parts of your power supply seperately, this means just the water costs you 25% of your total power capacity. This will also make it highly vulnerable to brownouts.

TLDR

We need a better way to void Ammonia. If a straight up rollback of the 122574 change is not possible, then the simple solution would be an ammonia-expensive but crude oil-less solid fuel recipe. The existing one costs 20 crude oil and 50 Ammonia - add another one that costs only 500 Ammonia. Alternatively, allow use to craft it using only ammonia and existing solid fuel - 1 Solid fuel + 200 Ammonia = 2 Solid Fuel. Then we can recycle it down again.

A more involved solution would be a wait to void fluids directly. This is Aquilo, who can't we pour it back into the ocean from which it came?

[CyberCider]

Well, it’s Aquilo. It’s supposed to be hard. The previous method was very clearly an exploit, Aquilo was designed with the other two methods in mind. We just have to face its intended difficulty now.

Also, this late in the game, I really wouldn’t be worried about depleting crude oil. By the time you reach Aquilo you should have all the mining productivity you will ever need.

Besides, fission and fusion are on the table.

[mouzy]

I think pre-fusion power gen on Aquilo is supposed to be kinda painful. Once you get fusion you don't need water for it and it generates absurd amounts of power.

[Hares]

You just make and burn solid & rocket fuel. There's more then enough crude oil around, and you'll need only a plentiful of it. Make a simple circuit condition that checks if your ammonia tanks are full while ice being empty, and allow burning fuel if that condition is met.

[erkki772]

Thing from Pyanodon. Sinkhole. Or plastic/explosives from ammonia. 500 ammonia to 1 plastic or explosive. That way we could recycle ammonia away without depending on some cheese method of recipe cycling

[Mooncat]

While I hope there is a fluid / gas sink in the game, the game actually has secretly provided the sink.

Spoiler

Select a recipe that uses the fluid / gas you want to sink.
Use circuit network to constantly change the recipe.
Because fluid / gas cannot be trashed, it just magically disappear.

The knowledge came from a reddit post.