Cologne, Germany:
Specialty Chemicals Company LANXESS has
announced a significant addition to its LewaPlus software suite of reverse
osmosis (RO) and ion exchange (IX) system dimensioning capabilities. The
new module provides system modeling with Desalitech's Closed Circuit
Reverse Osmosis (CCRO) technology and enables the dimensioning of
RO systems using the latest available water treatment technology, helping
system designers bring their water treatment footprint closer to zero liquid
discharge (ZLD) or minimum liquid discharge (MLD) goals.
Reverse osmosis is used for the desalination and purification of water
and has been growing rapidly in industrial, municipal and waste water
reuse applications. The technology is widely used, especially in areas of
water stress such as the American West.
The system operates in two alternating modes: Closed Circuit (CC)
mode at 100% recovery and Plug Flow (PF), or flushing mode, at
10 to 50% recovery. During CC operation, permeate is produced at
a rate equal to the flow rate from the high-pressure pump. When
a desired recovery percentage is reached, the operating mode is
switched to PF mode in which concentrated brine is purged from the
system and displaced by feed water from the high-pressure pump in
a single plug-flow sweep.
The new software module was developed cooperatively by LANXESS
Sybron Chemicals and Desalitech, Inc. (Newton, MA, USA).
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