Question

The liquid liberated by pressing the cooked fish meat during the fish meal and oil production is known as

• A. Cook drip
• B. Stick water
• C. Press liquor
• D. Fish solubles

Hint:

Remember the product stream in a fish meal plant:
Cooked fish \(\rightarrow\) Pressing \(\rightarrow\) Press liquor (Liquid) + Press cake (Solid).
Press liquor \(\rightarrow\) Centrifugation \(\rightarrow\) Fish Oil + Stickwater.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The manufacture of fish meal and fish oil involves cooking, pressing, separating, and drying operations designed to extract valuable proteins and lipids.

Step 2: Detailed Explanation:
- Press liquor: The raw liquid mixture containing water, dissolved proteins, and suspended oil that is squeezed out when cooked fish meat is passed through a screw press.
- Stickwater: The aqueous liquid remaining after the oil has been separated from the press liquor (via centrifugation).
- Fish solubles: The thick paste obtained by condensing stickwater.

Step 3: Final Answer:
The liquid liberated by pressing is known as Press liquor, which corresponds to option (C).