Why my cow milk is getting sopiled after boiling

Question

Lekha · Accepted Answer

Hello, If your cow's milk is getting spoiled after boiling, it could be due to several reasons related to contamination, storage, or handling.

1. Contamination of Milk
Use of unclean milking equipment or storage containers.
Ensure thorough cleaning and sterilization of milking equipment and storage containers.
Wash the cow's udder properly before milking.

2. High Bacterial Load in Raw Milk
Delayed boiling after milking allows bacteria to multiply.
Presence of mastitis or infection in the cow.
Boil the milk as soon as possible after milking.
Test the cow for mastitis and seek veterinary advice if needed.

3. Improper Boiling
Incomplete boiling may leave some bacteria active.
Overboiling can alter milk proteins, making it prone to curdling.
Heat the milk gradually and avoid overboiling. Bring it to a simmer (around 100°C) and then cool it immediately.

4. Storage Issues
Storing boiled milk in unclean or improperly sealed containers.
Using a refrigerator that is not cold enough (above 4°C).
Store milk in clean, airtight containers.
Keep the refrigerator at the correct temperature (below 4°C).

5. Poor Feed or Water Quality
The cow's diet or drinking water may be contaminated, affecting milk quality.
Ensure the cow has access to clean drinking water and a balanced diet.

6. Residual Chemicals or Antibiotics
If the cow has been treated with antibiotics, traces can remain in the milk.
Residual chemicals can interfere with milk stability.
Do not consume milk from cows under antibiotic treatment until the withdrawal period is over.

7. High Acidity in Milk
Natural souring of milk due to lactobacilli (acid-producing bacteria).
High acidity can lead to curdling when milk is heated.
Test the pH of the milk; it should be close to neutral (around 6.6–6.8).
Use freshly collected milk to avoid acidity buildup.

If these steps don’t resolve the issue, consider getting the milk tested at a laboratory to identify specific contamination or quality problems.