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Shrimp ammonium smell as an effect of drying

shrimp ammonium

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EugeneRo

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Posted 08 May 2021 - 03:42 AM

Hello! We are developing a new shrimp product using vacuum microwave drying. The shrimp is top quality consumer grade shell-on. Nothing special about sulphites or phosphates - everything is below the norm. Cold chain is unbroken. We receive IQF freezed product of 82% moisture. Defrost it in small batches for no more than 10 minutes under microwave, mix it with 1% salt and 1% apple cider vinegar and then use microwave-drying (maximum 80 degrees of heating temp) to bring it to around 20% moisture. All the process is fast, without overexposure to light, oxygen or something else. We work in clean environment, treated with ozone every night. The problem is that end-product develops strong ammonium smell. Can’t figure out why…



Charles.C

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Posted 09 May 2021 - 12:56 PM

 

Hello! We are developing a new shrimp product using vacuum microwave drying. The shrimp is top quality consumer grade shell-on. Nothing special about sulphites or phosphates - everything is below the norm. Cold chain is unbroken. We receive IQF freezed product of 82% moisture. Defrost it in small batches for no more than 10 minutes under microwave, mix it with 1% salt and 1% apple cider vinegar and then use microwave-drying (maximum 80 degrees of heating temp) to bring it to around 20% moisture. All the process is fast, without overexposure to light, oxygen or something else. We work in clean environment, treated with ozone every night. The problem is that end-product develops strong ammonium smell. Can’t figure out why…

 

 

Hi Eugene,

 

Decomposition of XYZ?


Kind Regards,

 

Charles.C


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Posted 10 May 2021 - 09:36 AM

Sounds like you have spoilage onset or contamination from fertilizer (if farmed) in raw material, just not at a sensory level until material is condensed by desiccation.


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