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The journey of milk

How milk travels from a cow on the pasture to the buyer's fridge: feeding, milking, cooling, transport, processing at the dairy, bottling, warehouse and shop.

  1. 🌿 Grass — The main summer feed. Feed shapes the taste and composition of milk.
  2. 🌄 Pasture — Land where livestock graze grass themselves; meadows and pastures cover 3.2 billion ha, about two thirds of the world's farmland.
  3. 🔄 Grazing — Livestock graze grass on pasture themselves; Irish cows graze from mid-February to late November, and grass costs a quarter of concentrate per kg.
  4. 🐄 Cow — The world's main source of milk: ≈81 % of global milk output (FAO). High-yielding cows give up to 60 kg of milk a day.
  5. 🔄 Milking — 2–3 times a day, by hand or by machine.
  6. 🔄 Filtration — Removing impurities from milk: on the farm, a sieve or filter before the tank; at the dairy plant, a mesh filter, a clarifier and membranes that hold back even bacteria.
  7. ❄️ Cooling — Quickly cooling fresh milk to 4 °C within 3–4 hours of milking to stop bacteria; in the EU on the farm it is no more than 8 °C.
  8. ⚙️ Bulk milk cooler — A tank on the farm: it cools milk from about 37 °C to +4 °C within two hours of milking at the latest, then holds it at 3–4 °C.
  9. 🚛 Milk tanker — A truck with an insulated tank that carries chilled raw milk from farms to the dairy; under EU rules it can be no warmer than 10 °C on arrival.
  10. 🚛 Raw milk transport — Farm → dairy plant by milk tanker, usually within a day.
  11. 🔄 Milk reception — The first stage of handling milk at the dairy: checking, measuring volume, cooling below +4 °C and storing in silos of 50,000–500,000 litres.
  12. ✅ Quality control — Fat, protein, bacteria, antibiotics, acidity.
  13. 🔄 Separation — Splitting milk into cream and skim milk in a centrifugal separator at 55–65 °C; the skim milk keeps only 0.04–0.07% fat.
  14. 🔄 Standardization — Fat content is adjusted to 1.5 / 2.5 / 3.2%.
  15. 🔄 Homogenization — Breaking up milk fat globules under 10–25 MPa pressure, from 3.5 µm to under 1 µm, so the cream does not rise to the top.
  16. 🌡️ Pasteurization — 72–75 °C for 15–20 seconds: kills pathogens; keeps ~7–10 days chilled.
  17. 🔄 Filling — Packing milk at the plant: pasteurised milk under clean, cold conditions, UHT milk aseptically into sterile containers.
  18. 🏷️ Labelling — Package data: name, ingredients, date, storage; in the EU the rules come from Regulation 1169/2011, applied since 13.12.2014.
  19. 📦 Warehouse — A facility where finished dairy products wait for shipment; pasteurized milk is kept there at 5–7 °C.
  20. 🚚 Distribution — From plant to store, pasteurized milk is kept at 5–7 °C, while sealed ultra-pasteurized milk can travel without refrigeration.
  21. 📦 Distribution center — A retail chain's large warehouse where goods are received and sorted into orders for stores.
  22. 🏪 Shop — Where milk is sold: chilled cases kept below 40 °F (≈4 °C); self-service was patented in 1916 by Clarence Saunders.
  23. 🚚 Delivery — The last link of the dairy chain: in the US, direct delivery of fluid milk fell from 54% in 1954 to 19% in 1971.
  24. 🛒 Shopper — The end point of the chain: picks milk off the shelf.
  25. 🧊 Refrigerator — Home storage of milk: no warmer than +4 °C.

Themes

🥛Types of milkFrom cow to reindeer: composition, benefits, value🧀Cheeses of the worldParmesan, feta, bryndza, sulguni and more🥣Fermented milk productsKefir, yogurt, kumis, matsoni, skyr🌍Dairy traditionsRegions, peoples and their dairy products🐄Dairy animalsWhich animals are milked and how their milk differs🚚The journey of milkFrom pasture to shop — step by step❤️Milk and healthCalcium, lactose, allergy, benefits and risks👷JobsWho works with milk🗺️Map of traditionsWorld regions, peoples and their products on a map⚖️ComparisonsKefir or yogurt, sour cream or cream, and more🍳RecipesCottage cheese, yogurt, ghee, paneer, butter — at home📜History of milkFrom domestication to Tetra Pak🫒OlivesVarieties, oil, table olives, regions and traditions🥃SpiritsWhisky, brandy, rum, liqueurs: how they are made, what the label says, which traditions🌼Monofloral honeyAcacia, lime, chestnut, lavender🏷️Protected honey namesMiel de Provence, Kraški med and other PDO and PGI🐝Bee productsBeeswax, propolis, pollen, bee bread, royal jelly🪵Apiary and beekeepingHives, frames, extractor, the beekeeper’s year🌸Honey plantsWhich plants give bees their nectar⚖️Honey labels and qualityCountry of origin, moisture, adulteration

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