Nano Filtration – The newest and most leading edge technology in water treatment is now available for practical use in your home, business or manufacturing facility.Nano filtration is a pressure driven separation process. The filtration process takes place on a selective separation layer formed by an organic semipermeable membrane. The driving force of the separation process is the pressure difference between the feed (retentate) and the filtrate (permeate) side at the separation layer of the membrane. However, because of its selectivity, one or several components of a dissolved mixture are retained by the membrane despite the driving force, while water and substances with a molecular weight < 200 D are able to permeate the semipermeable separation layer. Because nano filtration membranes also have a selectivity for the charge of the dissolved components, monovalent ions will pass the membrane and divalent and multivalent ions will be rejected.
- All items except atmospheric storage tank mounted on an aluminum skid on wheels for ease of installation.
- Entire unit without atmospheric storage tank(s) measures 48″ wide x 25″ long 61″ high.
- Maxi-Cure-3000 unit for pretreatment.
- NANO. unit with thin film element. Designed for 75% recovery and 66% rejection.
- Rotary vane pressure pump.
- Three pressure gauges.
- Waste and product flow meters.
- High and low pressure safety switches.
- Two 2.5″x 20″ long cartridge pre-filters. 5 micron and carbon block.
- Re-circulation and drain valves.
- Automatic flush on start up.
- Three tank level switches. System on/system off/re-pressure pump control.
- Automatic controller with four status lights.
- TDS monitor on treated water line.
- Complete 12gpm @ 50psi re-pressure pump system.
- UV light on outlet as final protection.
- Unit completely tested and on a pallet suitable for LTL truck shipment.
- One 300 gallon tank 35″ diameter x 81″ high
- 23″ dia x 64″ ht. 100 Gallon Storage Tank
- 23″ dia x 76″ ht. 130 Gallon Storage Tank
- 35″ dia x 81″ ht. 300 Gallon Storage Tank
- 46″ dia x 76″ ht. 500 Gallon Storage Tank
- 64″ dia x 81″ ht. 1000 Gallon Storage Tank
- 102″ dia x 151″ ht. 5000 Gallon Storage Tank
- Polyphosphate post filter 4 x 20
- Calcite up flow post filter 8 x 44
- Corosex post filter 8 x 44
- Automatic flush at start up
- PLC Controller
|Filtration level (micron)||0.0001 to 0.001||0.0008 to 0.01|
|Size of viruses (micron)||0.005 to 0.01||0.005 to 0.01|
|Size of bacteria (micron)||0.2 to 10||0.2 to 10|
|Filtration of viruses and bacteria||YES||YES|
|Typical recovery (%)||50%||75%|
|Typical TDS reduction (%)||98||70|
|Typical points of pH reduction||2+||Less than 1|
|Need for pH correction of permeate||Yes, 50% of time||No, 90% of time|
|Residual water hardness (grains)||0||1|
| Maximum raw TDS without special
design considerations (PPM)
|Average high pressure (PSI)||150||90|
This application required the use of a nano-filtration unit. The new homebuyer purchased this home in Temecula, Ca. with extremely poor water quality. A water treatment desal plant is in the area of this home. The previous homeowner had installed a small sand filter at the well and a reverse osmosis unit in the garage. The connecting pipes to this unit was extremely corroded due to the high dissolved solids. The piping and water heater were packed with sand. The small “tornado type” sand filter was basically doing nothing for the sand problem. The water quality tested as follows:
- Iron 8-10 ppm
- Hardness 32 grains per gallon
- Total dissolved solids 1,100ppm
- No other problems
Our recommendation was Nano-filtration at the well that would treat the whole property. Irrigation valves and heads would be destroyed from the sand and high dissolved solids. The water heater and fixtures in the house would also be destroyed quickly. Using Nano-filtration versus reverse osmosis was the best option. Total dissolved solids can be lowered to an acceptable level rather than removing 90-95%. Less cost and less energy used as well.
We started by removing the old filtration equipment in the garage and installed a Noritz tankless water heater. No one wants to lose garage space, so this was a great way to go. Also, tankless water heaters work great with probem water. If there is a malfunction,you are not stuck with trying to flush 50 gallons of poor quality water. The filtration equipment location required a raised shed at the well pump and pressure tank. The sand problem was solved by a large settling tank followed by a nextsand/pyrolux iron filter. This filter reduces iron and removes leftover sand from the water. Next used was a 64,000 grain softener with fine mesh resin. The Nano-filtration system is a 1,000 gallon per day unit with a 1,000 gallon storage tank. For delivery of water, two 12 gpm Grundfos re-pressurization pumps handle the job perfectly. A reverse osmosis drinking system was installed at the kitchen sink for perfect drinking water. The end result was:
- Iron 0ppm
- Hardness 0gpg
- Total Dissolved Solids 200-300ppm
- No sand
The main reason for using this system is to reduce Total Dissolved Solids. Most well water applicationstypically need some type of treatment. Iron, hardness, nitrates, etc. Water with high dissolved solids causes many problems and needs to be treated.