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Does anyone have experience of walnut in-shell bleaching?

walnut in shell in-shell shell bleaching bleach processing packing

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#1 AverageJoe

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Posted 11 September 2017 - 08:44 PM

Hello Everyone,

 

I work at a Walnut Processing/Packing facility and we are currently installing a bleaching system. The system is used to clean/brighten the shell for in-shell walnuts.

 

I was wondering if anyone has any knowledge or experience with this process? I am not sure of the concentration of chlorine that should be used, how we should test it/document it, how often, and what other documentation or paperwork we may need for this type of system. I am assuming this needs to be in our FSM and we need documents to show we are regularly verifying the amounts of chlorine in the system. 

 

I have researched online some but there isn't much information out there. I was hoping I could find someone here with some experience to help me out. 

 

Thanks!


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#2 SQFconsultant

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Posted 20 September 2017 - 02:16 AM

I don't personally believe in the practice, however it has been used for 50 to 60 years now - all I know is that it is a diluted mixture, but the concentration is elusive - your system installer should be able to determine the dilution.

 

Here's a good article on the subject --

 

http://www.oregonliv...bout_bleac.html


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#3 AverageJoe

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Posted 21 September 2017 - 06:19 PM

I don't personally believe in the practice, however it has been used for 50 to 60 years now - all I know is that it is a diluted mixture, but the concentration is elusive - your system installer should be able to determine the dilution.

 

Here's a good article on the subject --

 

http://www.oregonliv...bout_bleac.html

Thanks for the response. 

 

We are fabbing the system up ourselves but from what I gathered from other local companies who bleach, the concentration is usually 2-5%.

 

I plan on making a sheet for when the solution is made up, should I just have gallons of water and gallons of bleach or would it be wise to document orp or ppm's?


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Also tagged with one or more of these keywords: walnut, in shell, in-shell, shell, bleaching, bleach, processing, packing

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