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الماء القلوي المتأين
2012-05-01 16:40:46
الماء القلوي المتأينليس علاجاً ولا دواء ولكن وسيلة يابانية آمنة ومتطورة وفعالة لمعادلة وإزالة الفضلا
M800 Direct Flow منظومه تحلية امريكية
2010-12-17 16:21:25
USA - M800
101SV-UVمنظومات تحلية امريكية
2010-12-17 15:35:27
101SV-UV USA - RO101SV-UV 5 stage Reverse Osmosis Water Purification System with Ultraviolet Sterilizer Specifications: Membrane: 80 GPD 302 LPD With a transformer, availabl
صور منظومات تحلية تايوانية ممنزلية
2010-12-17 09:47:28

منظومة تحلية منزلية امريكية S800
2010-12-17 08:59:34
Specifications: Production: 50 GPD 189 LPD Water storage tank: 2.2gallons 8.3 liters With a booster pump (optional): -Input in AC 110Volt, 220Volt or 240Volt (5060Hz). Operation

 
 

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Reverse Osmosis Questions---2  

  articleReverse Osmosis Questions---2

Membrane Cleaning Questions & Answers


What is the difference with Tap Water Membranes and Brackish water Membranes?

 

 

There is no difference in the membrane material. Brackish water membranes have an outer shell of fiberglass whereas Tap water have a tape wrap. The construction allows Brackish water membranes to be operated at higher pressures required to treat brackish water.

 

How often should I clean my membranes?

 

 

In normal operation, the membrane in reverse osmosis membrane elements can become fouled by suspended solids, microorganisms and mineral scale. These deposits build up during operation and cause loss in water output or salt rejection, or both. Membrane elements should be cleaned whenever the normalized water output rate drops by 15% from its initial flow rate (the flow rate established during the first 24 to 48 hours of operation) or when salt content in in the product water rises noticeably.


It should be noted that the water output rate will drop if feedwater temperature decreases (see Temperature Correction). This is normal and does not indicate membrane fouling.

 


 

 

 

Is is necessary to heat our RO cleaning solution when the temperature of our well water is already relatively warm and does not change much throughout the year?

 

 

 

If your cleaning solution temperature is at least 20 deg C, then you do not need a heating element. Also, as you recycle the water there will be further rise in temperature, which should be kept below 50 deg C.


 

What is the proper sequence to follow when cleaning my membranes?

 

 

Membrane Cleaning Sequence

  1. Acid Cleaning
  2. Flush
  3. Alkaline Cleaning
  4. Flush
  5. Sanitizing
  6. Flush

 


 

 

What should the flow rate be for proper membrane cleaning?

 

 

Membrane Type Medium Flow (MF) High Flow (HF)
4" x 40" 4 10
4" Magnum 4 10
6" x 40" 12 20
8" x 40" 25 35
8" Magnum 25 35

 

Estimate of Total Flow Required for Membrane Cleaning

HTF = NV × HF
MTF = NV × MF

  • HTF = High Total Flow

  • MTF = Medium Total Flow

  • NV = Number of Vessels in Parallel

  • HF = High Flow from Flow Table

  • MF = Medium Flow from Flow Table


 

 

How much cleaning solution will I need to clean my membranes?

 
Membrane Type Chemical Solution Volume, Gallons (Vol)
4" x 40" 2.5
4" Magnum 3.5
6" x 40" 4.0
8" x 40" 6.0
8" Magnum 8.5

 

Estimate of Cleaning Solution Volume

V = El × Vol × 5

  • El = Number of Elements

  • Vol = Volume of one element from Flow Tables

 


 

 

Which Membrane Cleaner Should I Use?

 

 

 

The membrane cleaner required will depend on the type of fouling the membrane has been exposed to. Visit the below page to troubleshoot:

 
 

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