# Filtration (technology) internal name `filtration` · tier 2 (Logistic science pack, [tier 2](https://factorio.kalzumeus.com/tier/2.md)) HTML page: https://factorio.kalzumeus.com/tech/filtration/ ## Cost 175 units of (1 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 2 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 3 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 60 s each. ## Requires (1) - [Nitrogen - Stage 1](https://factorio.kalzumeus.com/tech/nitrogen-mk01.md) ## Leads to (4) - [Coal processing](https://factorio.kalzumeus.com/tech/coal-processing-2.md) - [Coalbed methane extractor - Stage 1](https://factorio.kalzumeus.com/tech/coalbed-mk01.md) - [Fish - Stage 2](https://factorio.kalzumeus.com/tech/fish-mk02.md) - [Phosphorous processing](https://factorio.kalzumeus.com/tech/phosphorous-processing.md) ## Unlocks (14 recipes) ### Activated carbon (`active-carbon`) - 4 s · tier 2 · productivity modules allowed - Ingredients: 2 × [Zinc chloride](https://factorio.kalzumeus.com/item/zinc-chloride.md), 30 × [Coal dust](https://factorio.kalzumeus.com/item/coal-dust.md), 50 × [Nitrogen](https://factorio.kalzumeus.com/fluid/nitrogen.md), 4 × [Sodium hydroxide](https://factorio.kalzumeus.com/item/sodium-hydroxide.md) - Results: 5 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md) - Made in: High pressure furnace MK 01, High pressure furnace MK 02, High pressure furnace MK 03, High pressure furnace MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Ash (`ash-bone`) - 4 s · tier 2 · productivity modules allowed - Ingredients: 2 × [Bones](https://factorio.kalzumeus.com/item/bones.md) - Results: 4 × [Ash](https://factorio.kalzumeus.com/item/ash.md) - Made in: High pressure furnace MK 01, High pressure furnace MK 02, High pressure furnace MK 03, High pressure furnace MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Ash (`ash3`) - 2 s · tier 2 · productivity modules allowed - Ingredients: 5 × [Raw fiber](https://factorio.kalzumeus.com/item/raw-fiber.md) - Results: 15 × [Ash](https://factorio.kalzumeus.com/item/ash.md) - Made in: High pressure furnace MK 01, High pressure furnace MK 02, High pressure furnace MK 03, High pressure furnace MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Filter MK 01 (`carbon-filter`) - 1 s · tier 2 - Ingredients: 2 × [Pipe](https://factorio.kalzumeus.com/item/pipe.md), 3 × [Steam engine](https://factorio.kalzumeus.com/item/steam-engine.md), 20 × [Iron plate](https://factorio.kalzumeus.com/item/iron-plate.md), 30 × [Small parts](https://factorio.kalzumeus.com/item/small-parts-01.md), 2 × [Burner assembling machine MK 01](https://factorio.kalzumeus.com/item/assembling-machine-1.md), 2 × [Intermetallics](https://factorio.kalzumeus.com/item/intermetallics.md) - Results: 1 × [Filter MK 01](https://factorio.kalzumeus.com/item/carbon-filter.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Fiber (`fiber`) - 5 s · tier 2 - Ingredients: 10 × [Raw fiber](https://factorio.kalzumeus.com/item/raw-fiber.md) - Results: 5 × [Fiber](https://factorio.kalzumeus.com/item/fiber.md), 6 × [Biomass](https://factorio.kalzumeus.com/item/biomass.md) - Made in: Ball mill MK 01, Ball mill MK 02, Ball mill MK 03, Ball mill MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Filtration media (`filtration-media`) - 3 s · tier 2 - Ingredients: 30 × [Pure sand](https://factorio.kalzumeus.com/item/pure-sand.md), 3 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md), 25 × [Gravel](https://factorio.kalzumeus.com/item/gravel.md), 6 × [Glass](https://factorio.kalzumeus.com/item/glass.md), 2 × [Microfiber](https://factorio.kalzumeus.com/item/micro-fiber.md) - Results: 5 × [Filtration media](https://factorio.kalzumeus.com/item/filtration-media.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Flue gas (`flue-gas-2`) - 3 s · tier 2 - Ingredients: 10 × [Ash](https://factorio.kalzumeus.com/item/ash.md), 50 × [Pressurized air](https://factorio.kalzumeus.com/fluid/pressured-air.md) - Results: 150 × [Flue gas](https://factorio.kalzumeus.com/fluid/flue-gas.md) - Made in: Gas refinery MK 01, Gas refinery MK 02, Gas refinery MK 03, Gas refinery MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Filter flue gas (`fluegas-filtration`) - 1 s · tier 2 - Ingredients: 100 × [Flue gas](https://factorio.kalzumeus.com/fluid/flue-gas.md) - Results: 2 × [Ash](https://factorio.kalzumeus.com/item/ash.md) - Made in: Filter MK 01, Filter MK 02, Filter MK 03, Filter MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Syngas (`fluegas-to-syngas`) - 7 s · tier 2 - Ingredients: 3000 × [Flue gas](https://factorio.kalzumeus.com/fluid/flue-gas.md), 1 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md) - Results: 300 × [Syngas](https://factorio.kalzumeus.com/fluid/syngas.md) - Made in: Filter MK 01, Filter MK 02, Filter MK 03, Filter MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Microfiber (`micro-fiber`) - 8 s · tier 2 - Ingredients: 4 × [Fiber](https://factorio.kalzumeus.com/item/fiber.md), 3 × [Sodium hydroxide](https://factorio.kalzumeus.com/item/sodium-hydroxide.md) - Results: 2 × [Microfiber](https://factorio.kalzumeus.com/item/micro-fiber.md) - Made in: Pulp mill MK 01, Pulp mill MK 02, Pulp mill MK 03, Pulp mill MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Refined syngas using filtered syngas (`refsyngas-from-filtered-syngas`) - 4 s · tier 2 - Ingredients: 100 × [Syngas](https://factorio.kalzumeus.com/fluid/syngas.md), 1 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md) - Results: 70 × [Refined syngas](https://factorio.kalzumeus.com/fluid/refsyngas.md) - Made in: Filter MK 01, Filter MK 02, Filter MK 03, Filter MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Sand washing (`sand-washing`) - 4 s · tier 2 - Ingredients: 10 × [Sand](https://factorio.kalzumeus.com/item/sand.md), 200 × [Water](https://factorio.kalzumeus.com/fluid/water.md) - Results: 8 × [Pure sand](https://factorio.kalzumeus.com/item/pure-sand.md), 80 × [Muddy sludge](https://factorio.kalzumeus.com/fluid/muddy-sludge.md) - Made in: Washer MK 01, Washer MK 02, Washer MK 03, Washer MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Wastewater fitration (`wastewater-filtration`) - 15 s · tier 2 - Ingredients: 100 × [Wastewater](https://factorio.kalzumeus.com/fluid/waste-water.md), 1 × [Filtration media](https://factorio.kalzumeus.com/item/filtration-media.md) - Results: 100 × [Methanol](https://factorio.kalzumeus.com/fluid/methanol.md) - Made in: Filter MK 01, Filter MK 02, Filter MK 03, Filter MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md) ### Zinc chloride (`zinc-chloride`) - 4 s · tier 2 · productivity modules allowed - Ingredients: 20 × [Hydrogen chloride](https://factorio.kalzumeus.com/fluid/hydrogen-chloride.md), 1 × [Zinc plate](https://factorio.kalzumeus.com/item/zinc-plate.md) - Results: 1 × [Zinc chloride](https://factorio.kalzumeus.com/item/zinc-chloride.md), 20 × [Hydrogen](https://factorio.kalzumeus.com/fluid/hydrogen.md) - Made in: Chemical plant, Chemical plant MK 01, Chemical plant MK 02, Chemical plant MK 03, Chemical plant MK 04 - Unlocked by: [Filtration](https://factorio.kalzumeus.com/tech/filtration.md)