Nanofiltration is a membrane separation process which removes many dissolved high molecular weight compounds from the water feed. Nanofiltration membranes are also known as “softening membranes” because they will remove the hardness from feed water but leave the majority of the lower molecular weight ions in the water. Nanofiltration membranes can also remove large organic molecules with molecular weight above about 1,000 Daltons such as color from water. Nanofiltration systems have replaced reverse osmosis membrane treatment in many applications where removal of just the hardness and large organics is needed for the end process. The most common applications for NF systems are for surface water and groundwater treatment. Nanofiltration is being increasingly used in the food processing industry.Based on the source of your feedwater (be it groundwater, surface water or tap water) with total dissolved solids ranging from 500 ppm to 15,000 ppm, Aqua Clear will run design projections and will either select one of our pre-engineered systems or custom design an NF membrane system that is optimal for your facility.
There are NF membranes available to meet various levels of ion selectivity. Aqua Clear will determine the most optimal membrane to match the client’s process water criteria.
Aqua Clear NF systems feature:
- Capacities ranging from 15,000 to 1 million gallons per day output
- Low energy NF membranes
- Energy-efficient stainless steel booster pump
- Variable Frequency Drive option
- Analog and digital instrumentation
- Microprocessor controller with digital readout
- Option to upgrade to fully integrated smart PLC controller with remote access capability
- Robust components from national supply chain
- Rigid skid frame with industrial powder coat
- Compact design (option to customize footprint)
- Prewired and pre-plumbed
- Factory tested prior to shipment
As a one stop shop, Aqua Clear’s water treatment specialists will engineer a pretreatment solution based on the client’s feedwater quality for long life protection of the NF booster pump and membranes. Pretreatment options include ultrafiltration, multimedia filtration, carbon filtration, dechlorination and antiscalant chemical dosing.
Also available are post-treatment options to further condition the NF permeate including UV disinfection and pH adjustment.
Aqua Clear’s membrane healthcare program includes our line of specially formulated reverse osmosis antiscalants, dechlorination agents and membrane cleaning solutions to extend the life of NF membranes. Client’s often integrate one of Aqua Clear’s clean-in-place (CIP) skids with their NF system as part of their predictive maintenance.
With an eye on “ONE WATER” solutions, Aqua Clear has many programs and capabilities to provide our clients with peace of mind. Aqua Clear’s water treatment specialists have the knowledge for onsite reuse of process wastewater using nanofiltration combined with other technologies. Also, our specialists have experience with capturing the brine reject (concentrate) from NF systems and recycling it for onsite use in applications such as cooling towers.
Our #1 product to this very day is our service. Aqua Clear offers preventative maintenance, remote monitoring & control, and membrane healthcare programs to extend the life of NF membranes. We can provide year-round service and/or operation of the water treatment system to support your facility.
