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Old October 11th, 2013, 01:33 AM
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Default Membrane cleaning.

I had my RO membrane cleaned by Roth Sugar Bush after last season. When I bought it used it came with a report saying that it was at 92%. After using it this year and rinsing after about 1500 gallons through out the day and a wash cycle every night It came back at 100% this year. What have others found with their membranes over time.
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Old October 11th, 2013, 09:26 AM
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Generally you hear of most peoples flow rates going down all the time=not there to see what they do but i strongly believe if you wash them with soap after every use and do an acid wash at least 2X a year you can keep the flow rates up around 100% for many years.
300 or 3000 gals of sap through my 600 and i would wash every tme after sap went through.

The higher or lower the PH that is recommended for the membrane cleaning will certainly clean it better. Powered soap(Sodium Hydroxide) used on most membranes is mostly a filler buffer so that you cannot really get over the membrane manufactures Max PH level. Add one table spoon to wash water or add 3 later it probably really didn't rise but maybe .2 tenths of a percent. Have heard of some putting in 1/2 a tub and still cannot get over 11PH. (they will sell you more buffer=lol) Get an MSDS and you will actualy see the % of filler that is added.

Keep doing what your doing and it will last a long time.
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The Following 2 Users Say Thank You to Kevin Sargent For This Helpful Post:
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Old October 11th, 2013, 09:35 AM
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Thanks Kevin being a newbie I was worried that I would mess it up. I was told and now believe that having a lot of permeate for quick rinsing was a factor on keeping things clean. NOT having a clue as to what really happens in the filter/membrane over the season its good to know I didn't harm it. I also think sending it back to CDL and having the best equipment clean it at seasons end was worth the $209.00 shipping included.
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Old October 11th, 2013, 08:28 PM
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Haynes do you have any idea what condition it was in when you sent it in?
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Old October 11th, 2013, 10:39 PM
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ogden I don't I was given a sheet that showed that it was cleaned and tested out at 92%. Im wondering why after my use and rinsing and daily cleaning and professional cleaning its back to 100%??
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Old October 12th, 2013, 08:21 AM
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yes sometimes the numbers makes things confusing. but you know where you are at now. Write down your flow numbers when you start out this year so you can keep track
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Old October 17th, 2013, 08:49 PM
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Quote:
Originally Posted by Haynes Forest Products View Post
ogden I don't I was given a sheet that showed that it was cleaned and tested out at 92%. Im wondering why after my use and rinsing and daily cleaning and professional cleaning its back to 100%??
You have a pm
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