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Old January 16th, 2014, 06:31 PM
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Default Sizing an RO?

I'm not there yet but I expect that one day I will be in the market for an RO. How do you figure out the GPH that you need for your size operation and what you may need in the future? Second question is why do everyone seem to keep the permeate? It's just pure waste water is it not?
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Old January 16th, 2014, 06:57 PM
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I figured the amount of taps I have and 1 or 2 gallons of sap per tap didn't want to spend countless hours in the sugar house. 500 gph seamed best for me . Keep the permeate for wash rinse . It is just that pure water.
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Old January 16th, 2014, 07:47 PM
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Figure how many gallons of sap you expect on a normal day and divide by the number of hours you want to spend boiling. That's the size of the RO. Then size your evaporator to handle 25% of what the RO is rated for or 10% if you are using a high brix RO. You can size the RO smaller, but then you will need to start it earlier and that means the concentrate has to sit.
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Old January 16th, 2014, 07:51 PM
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One 600 gallon post per 1000 gallons of syrup you make
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Old January 16th, 2014, 07:53 PM
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Quote:
Originally Posted by Toad Hill View Post
Figure how many gallons of sap you expect on a normal day
600 gallons
Quote:
Originally Posted by Toad Hill View Post
divide by the number of hours you want to spend boiling.
6
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Originally Posted by Toad Hill View Post
That's the size of the RO.
100? This is where I get confused. So I would need a 100 gph RO which is a step above the so-called hobby RO?
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Old January 16th, 2014, 08:14 PM
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You've got it. And a normal RO will produce 25 gph for each 100 gallons processed. So a 2x6 would be more than big enough to keep up and you would probably need to start the RO a little before the evaporator.
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Old January 16th, 2014, 09:10 PM
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Bryan Remember that down the road when the plantation goes on line you will be doing a lot of 1.5% and will want to get it to 8%. opportunities open up if you have a RO that's bigger than you need right now.
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Old January 17th, 2014, 11:09 AM
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Some things to keep in mind. Most manufactures use the membrane rating at the 68 degrees F. But producers are sending sap through the membrane at approximately 40 degrees F. The net result is decrease the manufactures rating by 80% for actual processing rates. You may also find the following tool helpful. RO Calculator. If you don't understand the tool please ask questions!!!! It is also available for android tablet or cell phone. Search in the google play store as "RO Calculator". The tool is also useful to adjust your concentration for days you only collect a little sap and need to have enough sap to effectively boil.
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Old January 17th, 2014, 04:00 PM
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Now that's going to be a handy app. I have it now on my pc and tried it and it works. However on my android I cant figure out when the number pad pops up, where is the decimal point? Anybody find it? For example, if Im trying to input 2.6 sap brix I can only enter 2 or 3 or. 4 You get my drift.
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Old January 17th, 2014, 04:17 PM
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Quote:
Trying to input 2.6
On my Droid Razr Maxx HD OS Ver 4.1.2 Verizon
I get a Number Pad arranged
1 2 3 -
4 5 6 ,
7 8 9 <bs>
\_\0 . <Next>

Using Swiftkey keyboard. Try another keyboard. That might fix the problem. I will also try it later on my wife's Tablet to see if the results are different.
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