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Effects of Yeast and Mold Growth on Product Moisture

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GarethToon

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Posted 25 September 2024 - 03:20 PM

Hello all,

 

I am working on a case at my current post where we had some product quality issues with a Lentil Flour Pellet. The product had some areas of discolouration which is assumingly due to yeast/mold. I had some of the discoloured sample isolated and sent for moisture and Y/M testing alongside an unchanged sample (mostly normal colour).

 

The isolated, discoloured sample did have higher mold counts (60,000 cfu/g) compared to the unchanged sample (12.000 cfu/g), but the moisture was more of a curiosity to me. The moisture of these pellets had dropped from 11.86% at time of manufacture to 9.41% at time of additional testing.

 

My question is as follows, does a Y/M issue gradually reduce moisture content if moisture increasing is restricted somehow? This product is toted and maintained in a food grade warehouse with low humidity and no dripping water. 

 

Looking forward to any ideas.

 

Thank-you and regards,

 

Gareth



G M

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Posted 25 September 2024 - 03:59 PM

I would have expected the opposite distribution.  Is there a physical factor like lower density/compression that could be giving the spoiled pellets a higher bioavailability or water activity?



kconf

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Posted 25 September 2024 - 06:49 PM

It is hard to conclude based on one trial. Also, the difference is not that great. 

 

What was the timeline of two tests? 





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Also tagged with one or more of these keywords: Yeast, Mold, Lentil, Pellets, Moisture, Decrease

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