K2: Add dirty water filtration

Limestone2/data.lua

@@ -1,3 +1,4 @@
 require("prototypes.limestone-ore")
 require("prototypes.calcium-recipe")
 require("prototypes.technology")
+require("prototypes.k2")

Limestone2/locale/en/Limestone.cfg

@@ -33,5 +33,6 @@ limestone-stone=Limestone to stone
 calcium-battery=Calcium battery
 bio-advanced-solar-panel=Bio advanced solar panel
 calcium-chloride-water-reaction=Calcium chloride water reaction
+dirty-water-filtration-limestone=Filter dirty water [item=limestone]
 
 [recipe-description]

Limestone2/prototypes/k2.lua

@@ -0,0 +1,48 @@
+if not mods["Krastorio2"] then
+  return
+end
+
+data:extend({
+  {
+    type = "recipe",
+    name = "dirty-water-filtration-limestone",
+    category = "kr-fluid-filtration",
+    icons = {
+      {
+        icon = data.raw.fluid["kr-dirty-water"].icon,
+        icon_size = data.raw.fluid["kr-dirty-water"].icon_size
+      },
+      {
+        icon = data.raw.item["limestone"].icon,
+        icon_size = data.raw.item["limestone"].icon_size,
+        scale = 0.20,
+        shift = { 0, 4 }
+      }
+    },
+    icon_size = data.raw.fluid["kr-dirty-water"].icon_size,
+    energy_required = 2,
+    enabled = false,
+    allow_as_intermediate = false,
+    always_show_made_in = true,
+    always_show_products = true,
+    ingredients = {
+      { type = "fluid", name = "kr-dirty-water", amount = 100, catalyst_amount = 100 },
+    },
+    results = {
+      { type = "fluid", name = "water", amount = 90, catalyst_amount = 90 },
+      { type = "item", name = "stone", probability = 0.30, amount = 1 },
+      { type = "item", name = "limestone", probability = 0.20, amount = 1 },
+    },
+    crafting_machine_tint = {
+      primary = { r = 0.60, g = 0.20, b = 0, a = 0.6 },
+      secondary = { r = 1.0, g = 0.843, b = 0.0, a = 0.9 }
+    },
+    subgroup = "raw-material",
+    order = "w013[dirty-water-filtration-aluminum]"
+  }
+})
+
+table.insert(data.raw.technology["kr-enriched-ores"].effects, {
+  type = "unlock-recipe",
+  recipe = "dirty-water-filtration-limestone"
+})