Portable Composter

From Unofficial Stationeers Wiki

Taken from Stationeers Stationpedia...
"A simple composting device, the basic composter creates fertilizer out of organic matter.
It accepts food, decayed food, or biomass. It requires a full Liquid Canister and a battery to operate, accelerating the natural composting process.
When processing, it releases Nitrogen and Volatiles, as well as a small amount of heat.
Fertilizer is produced at a 1:3 ratio of fertilizer to ingredients. the fertilizer's effects on plants will vary depending on the respective proportions of its ingredients."

Food Increases Yield up to 2x
Decayed Food Increases Growth Speed up to 2x
Biomass Increases Growth Cycles before the Fertilizer runs out


  • Insert an H2O canister with at least 20 mol H2O
  • Insert a battery cell
  • Insert at least 3 ingredients into the input slot on the top
  • Turn on the On switch, it will grind the ingredients
  • Point at the Activate button and it will tell you how many are ready for processing. You need at least 3 to produce 1 fertilizer
  • Press the Activate button, and it will start processing, including outputting H2 and N2
  • When done processing, a fertilizer will be produced in the output slot

More information:

  • Produced in the Electronics Printer (Tier One)
  • Each unit of fertilizer produced requires:
    • Power to run the composter
    • 3 ingredients (any mix of Food, Decayed Food, or Biomass)
    • 20 mol H2O
  • While producing one unit of fertilizer, the composter also produces (into the atmosphere):
    • 50 mol H2 at 45C
    • 50 mol N2 at 45C
  • Note that the portable composter seems to produce 15% of the N2 and H2 into the liquid canister, which appears to be a bug