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The Need
The Solution
Key Advantages
The Need Membrane technology has gained worldwide acceptance as a leading separation technology due to its reliability, simplicity, and low deployment and operating costs. For example, membranes play a key role in sea and brackish water desalination with reverse osmosis, water softening and removal of natural organic matter (NOM) with nanofiltration (NF), and the removal of pathogens with ultrafiltration. The continuously growing number of large-scale applications in the fields of drinking water supply and municipal wastewater treatment also points to the success of membrane technology.
Yet despite the proven success of this technology, many fields still cannot benefit from the advantages of membrane technology due to the limited stability and selectivity of commercially available membranes. In theory, many industrial water and wastewater streams could be treated cost-effectively with membranes; in practice, these streams are too aggressive and would destroy commercially available membranes due to extreme pH levels or the presence of organic solvents.
Selective and chemically stable membranes are poised to revolutionize many industrial and aggressive wastewater treatment processes, making them more cost-effective and less environmentally hazardous.
The Solution Nano-Pro™ is a line of chemically stable nanofiltration (NF) membranes with outstanding selectivities, developed specifically for the chemical process industry (CPI). Used in aggressive acids, bases and organic solvents, the membranes enable new separation operations not available until now with conventional technologies. When used for the recovery of valuable chemicals from industrial wastewater streams, Nano-Pro™ addresses a growing demand of environmental legislation to minimize wastewater volumes and recycle most of the water and chemical resources. Compared to alternative technologies, Nano-Pro™ allows industrial clients to more efficiently manage their chemical, water and energy resources while minimizing wastewater treatment costs.
Typical applications include:
• Recovery of spent acids (sulfuric, hydrochloric): widely
employed in the fields of metal processing, production of high
quality ceramics and glass, sugar purification etc; chemically
stable, selective nanofiltration membranes can remove organic
contaminants and allow reuse of purified acids
• Removal of dissolved metals and organic substances from
spent caustic streams: enabling the reuse of these chemicals
in the food industry, and bottle washing in the aircraft industry
where purified caustic solutions can be reused rather then
neutralized and discarded as waste
Treatment of industrial wastewater with these membranes leads to reduced usage of chemicals and recovery of products with immediate economic benefits to industrial users. Selective nanofiltration membranes empower unique separation processes that are simpler and more cost-effective than processes used today with conventional equipment.
Configuration Options
Nano-Pro™ membranes are supplied in two configurations:
• Spiral wound (SW) elements
• Plate-and-frame (P&F) modules
Nano-Pro™ membranes are offered as a core element of our HMT™ system, or as a stand-alone product for solution providers and systems integrators.
Key Advantages Acid-Base Stable Nano-Pro™ Technological Package
• Full coverage of acid-base applications: With a single
membrane type (pH 0-14), Nano-Pro™ enables the purification
of highly concentrated acids (20% sulfuric acid) to highly
concentrated bases (20% NaOH).
• Extended pressure range: Nano-Pro™ modules are offered in
SW or P&F configurations, covering an extended pressure range
up to 120 bars; this wide range enables processing of a variety
of industrial and wastewater liquids, overcoming osmotic
pressure, and performing effective separations where acidic and
basic liquid streams contain high concentrations of dissolved
species or are highly viscous.
• High selectivity and fluxes: The superior passage of minerals
(salts, acids, bases) and the simultaneous high rejection of
dissolved organic compounds result in higher purification
performance, higher fluxes, and lower costs compared to
competitive products.
Solvent-Resistant Nano-Pro™ Membranes
• Unrivaled solvent stability: Nano-Pro™ solvent-resistant
membranes are manufactured from chemically stable,
crosslinked polymers that are stable in all organic solvents and
solvent mixtures. Small changes in solvent composition
sometimes can have a dramatic effect on the solvating power of
the organic stream, and cause damage to many competitive
polymeric membranes. The unsurpassed solvent stability of Nano-
Pro™ guarantees reliable operation of the membrane plant in all
process conditions.
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