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Problem with Milk packed in Tetra-Brick


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#1 gkolevski

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Posted 24 August 2011 - 09:32 AM

Hi everyone,

Can anyone explain me the next situation :

I' ve recently found milk packed in tetra-brick in one of the superstores, with normal shelf-life, but it was bloated.
I've given the milk on bacteriological analyses, but they were OK.
So what could be the problem ? (the producer says his analyses are also OK) :dunno:



#2 GMO

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Posted 24 August 2011 - 11:01 AM

I'm no micro expert but what did you test it for and what was the result? Did you test the specific bloated pack or just that batch? I would suspect there could have been some micro contamination through a seal, especially if you've not had a widespread issue; although if you've had an issue at all with one seal, there could be a problem with lots of them. Do you keep retained samples?



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#3 gkolevski

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Posted 24 August 2011 - 11:43 AM

There were several samples with this problem, it's not only this specimen. Microbiological test were for mezofili aerobic bacteria. They were not present. I guess it's maybe the temperature or some chemical problem ?



#4 Orla

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Posted 24 August 2011 - 12:16 PM

Saw this happen many times during my 25 years in the dairy industry. It's the carton. The storage temperature of the flat cartons is important. If not held at the recommended temperature and humidity the cartons will sag and bloat when filled and refrigerated, Check storage temperature of the flat cartons. That's what's causing your problem.



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#5 Lean z

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Posted 24 August 2011 - 01:03 PM

Hi there, I have similar issue before. if the pack is blown for a while, due to the bacteria competition and their by-product produced, all of them will die, so u could not find counts in it. But I think u need to be cautious about the product. I recon it might be due to some extreme thermophilics. Hope this helps.



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#6 Feel Good

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Posted 26 August 2011 - 07:51 AM

There is possibility of chemical residual effect.
Sometimes, early packages need be removed from the line;
and at that pointsome packs may show similar type of problem/s.
Or, treatment of paper when pass through hydrogen peroxide bath
may be insufficient, which can lead to high heat resistant bacteria may not be detected
at tepmperatures of incubation while testing? I am not sure.
Handling of packs during transit and internal shifting in shops can lead to micro-damage.
Needless to say, western countires are having best technology and food safety management systems, but,there is a chance of error.
Okey?



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#7 saguym

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Posted 28 August 2011 - 09:03 AM

Hi everyone,

Can anyone explain me the next situation :

I' ve recently found milk packed in tetra-brick in one of the superstores, with normal shelf-life, but it was bloated.
I've given the milk on bacteriological analyses, but they were OK.
So what could be the problem ? (the producer says his analyses are also OK) :dunno:


Have you checked the Head Space Analysis ?
The head space composition may tell you the real reason for the bloat .

saguym

#8 gkolevski

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Posted 01 September 2011 - 11:51 AM

I can't understand You quite well ?
Can You explain me little more detailed, pls ? tnx



Have you checked the Head Space Analysis ?
The head space composition may tell you the real reason for the bloat .

saguym






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