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Time and temperature control for blast freezing of Fish

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#1 ronin

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Posted 26 September 2020 - 07:55 AM

Dear friends, I am here with a doubt. What will the time and temperature control for Blast freezing process intended to produce Frozen fish. What is the time limit to reach the core temperature to -18 ?? Thanks



#2 Charles.C

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Posted 27 September 2020 - 05:22 AM

 

Dear friends, I am here with a doubt. What will the time and temperature control for Blast freezing process intended to produce Frozen fish. What is the time limit to reach the core temperature to -18 ?? Thanks

 

 

It obviously depends on things like thickness of the product, total load in freezer, refrigeration capacity.

.
Opinions vary but just as a non-blast freezer example, plate freezers are (ideally) often expected to achieve -18degC for a typical, approx. 7kg box of fish fillets in approx. 2 hours.


Kind Regards,

 

Charles.C


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#3 ronin

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Posted 27 September 2020 - 07:19 AM

It obviously depends on things like thickness of the product, total load in freezer, refrigeration capacity.

.
Opinions vary but just as a non-blast freezer example, plate freezers are (ideally) often expected to achieve -18degC for a typical, approx. 7kg box of fish fillets in approx. 2 hours.

Dear Charles

Thanks for your valuable information, but i need to know is there any mandatory regulation that says if blast freezing the core temp of the product should reach -18 deg celcius with in 4 hours. That is were i got stucked.

Thanks



#4 Charles.C

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Posted 27 September 2020 - 03:10 PM

Dear Charles

Thanks for your valuable information, but i need to know is there any mandatory regulation that says if blast freezing the core temp of the product should reach -18 deg celcius with in 4 hours. That is were i got stucked.

Thanks

 

Hi ronin,

 

UK Guidelines attached.

 

Attached File  Blast freezing time Guidelines.pdf   218.33KB   18 downloads


Kind Regards,

 

Charles.C


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#5 ronin

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Posted 28 September 2020 - 04:49 AM

Hi ronin,

 

UK Guidelines attached.

 

attachicon.gif Blast freezing time Guidelines.pdf

Dear Charles

      Thanks for the help and such a valuable information, can you provide me EU regulation where it says " in blast freezer food be reduced from a temperature of +70ºC to –18ºC in no more than 240 minutes".

 

Thanks



#6 Charles.C

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Posted 28 September 2020 - 07:53 PM

Dear Charles

      Thanks for the help and such a valuable information, can you provide me EU regulation where it says " in blast freezer food be reduced from a temperature of +70ºC to –18ºC in no more than 240 minutes".

 

Thanks

 

Hi Ronin,

 

IIRC, such a Regulation for NRTE frozen fish for EU does not exist. I think the EU prefer the terminology "rapidly".

But happy to be proven incorrect. :smile:

 

India seems to advocate a range of times -

 

Attached File  frozen food processing industry in India.pdf   1.95MB   7 downloads


Kind Regards,

 

Charles.C






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