Freezing Technology

Teacher

Dr. R. SRINU

Category

Core Courses

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Course Name : Freezing Technology

FSPT 2103(1+1) : FSPT 2103(1-1-0)

Course Objective

At the end of the course, students will have the knowledge on

  1. Freezing and frozen storage - principles and process
  2. Approximation of the constituents present in the fish and changes during freezing
  3. Various equipments involved in freezing
  4. Cold chain importance

CO-PO Mapping

COs Course outcomes Mapping Cos with POs
CO-1 Students will understand the about freezing and frozen storage principles, process and production PO1, PO2
CO-2 Students will Understand the approximation of the constituents present in the fish and changes during freezing PO1
CO-3 Students will learn about various equipment involved in pre processing, freezing and cold storage. PO1, PO2

PO1 : Knowledge enhancement

PO2 :  Professional and Entrepreneurial Skill development

Course Syllabus

Freezing Technology     

Theory

  1. Introduction to freezing technology, Characteristics of fish and shellfish
  2. Changes in fish after death, Spoilage of fish, Spoilage and pathogenic microorganism
  3. Handling of fresh fish, Sanitation in processing plants
  4. Principles of low temperature preservation, Chilling of fish – methods and equipments for chilling, Icing- Quality of ice, Ice making
  5. Refrigerated and chilled sea water, Chilling rate, Spoilage of fish during chilled storage, use of antibiotics and chemicals
  6. Freezing of fish- fundamental aspects, heat units, Freezing point depression, Eutectic pint, Freezing rate
  7. Methods of freezing
  8. Freeze drying
  9. Physicochemical changes that occur during freezing, Mechanism of ice crystal formation
  10. Preparation of fish for freezing
  11. Changes that occur during frozen storage
  12. Protective treatments
  13. Thawing of frozen fish
  14. Transportation of frozen fish
  15. Quality control of frozen fish
  16. HACCP in freezing industry

Practicals

  1. Study of refrigeration cycle
  2. Sanitation and plant housekeeping
  3. Chilling and freezing equipment
  4. Different packages used for frozen products
  5. Freezing of IMC in different styles
  6. Freezing of shrimp in different styles
  7. Methods of icing fish
  8. Calculation of Ice requirement for cooling fish
  9. Preservation by chilled sea water and Refrigerated sea water
  10. Freezing and thawing curves
  11. Freezing of carbs
  12. Freezing of squid and cuttle fish
  13. Freezing of Lobster
  14. Estimation of drip
  15. Inspection of frozen fishery products
  16. Visit to ice plant/freezing plant/cold storage

References

1. Post-Harvest technology of fish and fish products ---- K.K. Balachandran

2. Fish Processing Technology and product development----A.S.Niwane & Rathnakumar

3. Fish Packaging Technology ---- Gopakumar K

4. Advances in Fish Processing Technology ----- DP Sen

Session Plan

Session 1

Introduction to freezing technology; characteristics of fish and shellfish; changes in fish after death, spoilage of fish, spoilage and pathogenic microorganism.

Session 1

https://www.youtube.com/watch?v=D8Npk0ZtxJg

Practical- Plant Hygiene and Sanitation

P1

Session 2

Chilling of fish – methods and equipment for chilling; icing – quality of ice, ice making; refrigerated or chilled sea water, chilling rate; spoilage of fish during chilled storage; use of antibiotics and chemicals.

Session 2

https://www.youtube.com/watch?v=9ztjEOk-tJQ

https://www.youtube.com/watch?v=0WxLLsviIRw

Session 3

Manufacturing of different types of Ice, Super chilling (0ºC to - 4ºC), Application of ozone / chlorine in seafood processing

Session 3

https://www.youtube.com/watch?v=dB6Dxsxb8Og

https://www.youtube.com/watch?v=Y2zdsLrFVb0

Session 4

Freezing preservation of fish, Physical, chemical and thermodynamic properties of  refrigerants

Session 4

https://www.youtube.com/watch?v=rRyo4WcIsMg

https://www.youtube.com/watch?v=jO1tHkoo4-Y

https://www.youtube.com/watch?v=bGdZWyEtYFY

Session 6

Types of freezer, Methods of protective treatments, Calculation of freezer refrigeration load

Session 6

https://www.youtube.com/watch?v=TPabv9iDENc

https://www.youtube.com/watch?v=0gv2tJf7nwo

Session 7

Freeze drying of fish, Thawing of fish, Quality changes during frozen storage, Microbial growth at low temperature.

Session 7

https://www.youtube.com/watch?v=vwtAuslmCkU

https://www.youtube.com/watch?v=_nLsoFNsxHk

https://www.youtube.com/watch?v=3qEwfIif89U

Session 8

Cold stores and containers, Refrigerated containers, Good handling and shipping practices

Session 8

https://www.youtube.com/watch?v=OwSSk1vF5ZI

https://www.youtube.com/watch?v=nMd9mahYoOg

https://www.youtube.com/watch?v=hKRL-HcSJx0

 

Session 9

Packaging methods, Packaging of frozen fishery products, Vaccum packaging and modified atmosphere packaging and storage

Session 9

https://www.youtube.com/watch?v=O1gQNkxkdCE

https://www.youtube.com/watch?v=juvZ-rtViK0

https://www.youtube.com/watch?v=mLXfZGAV5Gw

 

Session 10

HACCP, Physical, chemical and biological hazards in seafood, Important biotoxin in seafood, Histamine

Session 10

https://www.youtube.com/watch?v=j-XNzBUKOoE

https://www.youtube.com/watch?v=5oOhgJd046w

https://www.youtube.com/watch?v=-XZphYpRlyA

 

 

 

Question Bank

Click on the link for model question paper

Freezing Technology Model Question

Assignment topics

Changes in fish after death, Spoilage of fish, Spoilage and pathogenic microorganism

Handling of fresh fish,

Sanitation in processing plants

Chilling of fish – methods and equipments

Methods of freezing

Freeze drying

Physicochemical changes that occur during freezing, Mechanism of ice crystal formation

Changes that occur during frozen storage

Protective treatments

Thawing of frozen fish

Quality control of frozen fish

HACCP in freezing industry

Our Main Teachers

SRINU. R is working as an Associate Professor in the Department of Fish Processing Technology, School of Fisheries, CUTM, Paralakhemundi Campus from May 2023 onwards. He completed his Ph.D., M.F.Sc in Post-Harvest Technology from ICAR-Central Institute of Fisheries Education, Mumbai and B.F.Sc. (Bachelor of Fisheries Science) from College of Fishery Science – Muthukur, SVVU. He […]