Cleaning (TSC) Methods

• TSC-1 Low pH cleaning
• TSC-3 High pH Cleaning for Thin Film Composite Elements
• TSC-4 High pH Cleaning for Cellulose Acetate Elements
• TSC-6 Aggresive Biological and Organic Cleaning
• TSC-7 Biological and Organic Cleaning
• TSC-8 Low pH Cleaning
• TSC-10 Low pH Cleaning  
• TSC-11 High pH Cleaning for Thin Film Composite Elements(Liquid)

Cleaning (TSC) Methods

TSC-1: Low pH Cleaning

1. Clean and fill solution tank with proper volume of RO Permeate Water.
2. Start water recirculating through pump and back into the tank during chemical mixing.
3. Add 1.5 pounds of TriClean 210 per every 10 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
4. Add 1 gallon of TriClean 211 per every 110 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
5. Check pH of solution (proper range is between 2.5 and 3.5 unless otherwise specified by membrane manufacturer). pH may be raised by adding ammonium hydroxide or lowered by adding additional TriClean 210.
6. Isolate first pass to be cleaned. With Concentrate and Product Lines diverted to proper drain, slowly run cleaning solution through pressure vessels until all remaining water is out of vessels and cleaning solution is coming out of concentrate line. Shutdown pump and divert Concentrate and Product lines to cleaning solution tank.
7. If tank volume is now too low, mix additional cleaning solution.
8. Start recirculating the cleaning solution through the vessels at specified flow rate ( or, if different, at manufacturer’s specified flow rate) per vessel. Pump pressure should be between 20 and 50 psi. Recirculate for 1 hour checking pH periodically. If pH goes above 4.0, a new solution will have to be mixed.
9. Shutdown pump and allow to static soak for 1 hour while cleaning additional passes.
10. Follow same procedure for cleaning additional passes.
11. After soaking, recirculate each pass for 20 minutes.
12. Rinse using rinsing method TSR-1.

SC-3: High pH Cleaning for Thin Film Composite Elements

1. Clean out solution tank and add appropriate volume of RO Permeate Water.
2. Start water recirculating through pump and back to tank.
3. Add 2 pounds of TriClean 212TF per every 15 gallons of water in tank. Recirculate until completely dissolved.
4. Check pH of solution. Range should be between 10.5 and 11.5 unless otherwise specified by membrane manufacturer. pH may be raised by adding additional TriClean 212TF or lowered by adding sulfuric acid.
5. Displace water in vessels by diverting Concentrate and Product lines to an appropriate drain and slowly pumping solution into vessels until it is visible coming from the Concentrate line. Shutdown the pump and divert Concentrate and Product lines back to cleaning solution tank.
6. Recirculate solution through vessels at appropriate flow and pressure for 30 minutes.
7. Shutdown pump and allow to static soak for 1 hour.
8. Clean additional passes in the same manner while first pass soaks.
9. After soaking, recirculate each pass for 30 minutes.
10. Rinse using rinsing method TSR-1.

TSC-4: High pH Cleaning for Cellulose Acetate Elements

1. Clean out solution tank and add appropriate volume of RO Permeate Water.
2. Start water recirculating through pump and back to tank.
3. Add 2 pounds of TriClean 212CA per every 15 gallons of water in tank. Recirculate until completely dissolved.
4. Check pH of solution. Range should be between 7.0 and 7.8 unless otherwise specified by membrane manufacturer. pH may be raised by adding additional TriClean 212CA or lowered by adding sulfuric acid.
5. Displace water in vessels by diverting Concentrate and Product lines to an appropriate drain and slowly pumping solution into vessels until it is visible coming from the Concentrate line. Shutdown the pump and divert Concentrate and Product lines back to cleaning solution tank.
6. Recirculate solution through vessels at appropriate flow and pressure for 30 minutes.
7. Shutdown pump and allow to static soak for 1 hour.
8. Clean additional passes in the same manner while first pass soaks.
9. After soaking, recirculate each pass for 30 minutes.
10. Rinse using rinsing method TSR-1.

TSC-6: Aggressive Biological and Organic Cleaning

NOTE: This cleaning is extremely aggressive and may result in some loss of membrane performance.

1. Clean and fill solution tank with proper volume of RO Permeate Water.
2. Start water recirculating through pump and back into the tank during chemical mixing.
3. Add 1.1 pounds of TriClean 213 per every 25 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
4. Add 1 gallon of TriClean 211 per every 110 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
5. Check pH of solution (proper range is below 11.5 for thin film composite elements and below 7.8 for CA elements unless otherwise specified by membrane manufacturer). pH may be lowered by adding sulfuric acid.
6. Isolate first pass to be cleaned. With Concentrate and Product Lines diverted to proper drain, slowly run cleaning solution through pressure vessels until all remaining water is out of vessels and cleaning solution is coming out of concentrate line. Shutdown pump and divert Concentrate and Product lines to cleaning solution tank.
7. If tank volume is now too low, mix additional cleaning solution.
8. Start recirculating the cleaning solution through the vessels at specified flow rate ( or, if different, at manufacturer’s specified flow rate) per vessel. Pump pressure should be between 20 and 50 psi. Recirculate for 1 hour checking pH periodically
9. Shutdown pump and allow to static soak for 1 hour while cleaning additional passes.
10. Follow same procedure for cleaning additional passes.
11. After soaking, recirculate each pass for 20 minutes.
12. Rinse using rinsing method TSR-1.

TSC-7: Biological and Organic Cleaning

1. Clean and fill solution tank with proper volume of RO Permeate Water.
2. Start water recirculating through pump and back into the tank during chemical mixing.
3. Add 1 gallon of TriClean 214 per every 110 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
4. Check pH of solution (proper range is below 11.5 for thin film composite elements and below 7.8 for CA elements unless otherwise specified by membrane manufacturer). pH may be lowered by adding sulfuric acid.
5. Isolate first pass to be cleaned. With Concentrate and Product Lines diverted to proper drain, slowly run cleaning solution through pressure vessels until all remaining water is out of vessels and cleaning solution is coming out of concentrate line. Shutdown pump and divert Concentrate and Product lines to cleaning solution tank.
6. If tank volume is now too low, mix additional cleaning solution.
7. Start recirculating the cleaning solution through the vessels at specified flow rate ( or, if different, at manufacturer’s specified flow rate) per vessel. Pump pressure should be between 20 and 50 psi. Recirculate for 1 hour checking pH periodically
8. Shutdown pump and allow to static soak for 1 hour while cleaning additional passes.
9. Follow same procedure for cleaning additional passes.
10. After soaking, recirculate each pass for 20 minutes.
11. Rinse using rinsing method TSR-1.

TSC-8: Low pH Cleaning

1. Clean and fill solution tank with proper volume of RO Permeate Water.
2. Start water recirculating through pump and back into the tank during chemical mixing.
3. Add 1 gallon of TriClean 217 per every 25 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
4. Add 1 gallon of TriClean 211 per every 110 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
5. Check pH of solution (proper range is between 2.0 and 3.5 unless otherwise specified by membrane manufacturer).
6. Isolate first pass to be cleaned. With Concentrate and Product Lines diverted to proper drain, slowly run cleaning solution through pressure vessels until all remaining water is out of vessels and cleaning solution is coming out of concentrate line. Shutdown pump and divert Concentrate and Product lines to cleaning solution tank.
7. If tank volume is now too low, mix additional cleaning solution.
8. Start recirculating the cleaning solution through the vessels at specified flow rate ( or, if different, at manufacturer’s specified flow rate) per vessel. Pump pressure should be between 20 and 50 psi. Recirculate for 1 hour checking pH periodically. If pH goes above 5.0, a new solution will have to be mixed.
9. Shutdown pump and allow to static soak overnight.
10. After soaking, recirculate each pass for 20 minutes.
11. Rinse using rinsing method TSR-1.

TSC-10 Low pH Cleaning

1. Clean and fill solution tank with proper volume of RO Permeate Water.
2. Start water recirculating through pump and back into the tank during chemical mixing.
3. Add 1 gallon of TriClean 216 per every 40 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
4. (Optional) Add 1 gallon of TriClean 211 per every 110 gallons of water in the tank. Allow to recirculate until thoroughly mixed.
5. Check pH of solution (proper range is between 2.5 and 3.5 unless otherwise specified by membrane manufacturer). pH may be raised by adding ammonium hydroxide or lowered by adding additional TriClean 216.
6. Isolate first pass to be cleaned. With Concentrate and Product Lines diverted to proper drain, slowly run cleaning solution through pressure vessels until all remaining water is out of vessels and cleaning solution is coming out of concentrate line. Shutdown pump and divert Concentrate and Product lines to cleaning solution tank.
7. If tank volume is now too low, mix additional cleaning solution.
8. Start recirculating the cleaning solution through the vessels at specified flow rate ( or, if different, at manufacturer’s specified flow rate) per vessel. Pump pressure should be between 20 and 50 psi. Recirculate for 1 hour checking pH periodically. If pH goes above 4.0, a new solution will have to be mixed.
9. Shutdown pump and allow to static soak for 1 hour while cleaning additional passes.
10. Follow same procedure for cleaning additional passes.
11. After soaking, recirculate each pass for 20 minutes.
12. Rinse using rinsing method TSR-1.

TSC-11: High pH Cleaning for Thin Film Composite Elements (Liquid)

1. Clean out solution tank and add appropriate volume of RO Permeate Water.
2. Start water recirculating through pump and back to tank.
3. Add 1 gallon of TriClean 219 per every 40 gallons of water in tank. Recirculate until completely dissolved.
4. Check pH of solution. Range should be between 10.5 and 11.5 unless otherwise specified by membrane manufacturer. pH may be raised by adding additional TriClean 219 or lowered by adding sulfuric acid.
5. Displace water in vessels by diverting Concentrate and Product lines to an appropriate drain and slowly pumping solution into vessels until it is visible coming from the Concentrate line. Shutdown the pump and divert Concentrate and Product lines back to cleaning solution tank.
6. Recirculate solution through vessels at appropriate flow and pressure for 30 minutes.
7. Shutdown pump and allow to static soak for 1 hour.
8. Clean additional passes in the same manner while first pass soaks.
9. After soaking, recirculate each pass for 30 minutes.
10. Rinse using rinsing method TSR-1.

Rinsing (TSR) Procedures

TSR-1: Post Cleaning Rinse

1. With pump in the off position, divert Concentrate and Product lines to appropriate drain.
2. Thoroughly rinse out solution tank and fill with RO Permeate or Deionized water.
3. Start pump and begin rinse water through vessels.
4. Rinse for a minimum of 20 minutes.
5. Test pH of water in solution tank and then test pH of Concentrate water.
6. When both pH readings are similar, rinse one more tank volume of water through vessels.
7. Rinse additional passes in the same manner.
8. Shutdown pump and go on to next cleaning method or if cleaning is complete, go to rinse method TSR-2

TSR-2: RO Start-Up

1. Return RO manifolds to normal operating configuration.
2. Divert Concentrate and Product lines to drain.
3. Start water flowing through RO at city water pressure only. DO NOT START PUMP.
4. Allow water to flow through vessels for a minimum of 15 minutes and until all air is out of the system.
5. Start RO pump and adjust pressures and flows to normal operating perameters.
6. Flush to drain for a minimum of 30 minutes.
7. Test pH or Conductivity of Concentrate and Product waters and compare to pre-cleaning readings.
8. When pH or Conductivity is similar to pre-cleaning readings, shutdown RO pump and divert Concentrate and Product lines back to normal operating configuration.
9. Restart RO.

Note: Unless otherwise noted in Cleaning Method or recommended by membrane manufacturer, TriSep Cleaners are designed to be used at temperatures between 75 and 100 degrees F.