Membrane Systems

Packaged water membrane system:

Engineered packaged system for the efficient treatment of water a source to required quality, using membrane technologies. Reverse osmosis (RO) systems are employed where the feed water source has dissolved contaminants which need to be removed.

  

Potable Water Production Brochure


Reverse Osmosis Systems

Reverse osmosis (RO) technology is used to remove total dissolved solids (TDS) from water. The removal mechanism of RO systems is different to the removal mechanism of filtration due to the fact that physical holes do not exist in the RO membrane. Nanotech Water Solutions have installed numerous RO units as part of a turnkey solution in various industries.

Some of the uses are:

  • Potable water production
  • Process water production (product water, boiler feed water)
  • Discharge water recovery (from various sources)

Ultrafiltration (UF)

Ultrafiltration (UF) is a pressure-driven process that removes a variety of suspended solids (TSS) and particles from water, and other solutions. Some of these solids include bacteria (and some viruses), emulsified oils, metal hydroxides, colloids, emulsions, dispersed material, suspended solids, and other large molecular weight materials.

TREATMENT SYSTEMS CAN BE CONTAINERIZED OR SKID MOUNTED AND TYPICALLY USED FOR:

  • Potable water production
  • Process water purification
  • Waste water purification
  • Reverse osmosis (RO) pre-treatment (consistently producing a SDI < 3)

UF systems very often form part of RO pre-treatment and have the following advantages over conventional systems for RO pre-treatment:

UF Membrane Pre-Treatment Conventional Pre-Treatment
Provides a physical barrier to particles, thereby giving consistently high quality and reliable feed water to the RO. Removes a proportion of particles but produces poor and inconsistent feed quality to the downstream RO. Operational and feed-dosing problems as well as backwashing operation of sand filters can result in long periods of poor RO feed quality.
Good quality feed to RO means lower frequency of RO cleaning and therefore extended on-stream time. More frequent RO cleaning required due to poor feed quality, resulting in downtime.
Lifespan of RO membranes is extended, hence membrane replacement cost is lower. RO membranes may need to be replaced more regularly, resulting in higher operational cost.
Lower requirements for chemical dosing and for RO cleaning, resulting in lower chemical cost Chemical dosing is required in conventional pre-treatment and with more frequent RO cleaning, more chemicals are also used.
Lower environmental impact. Extensive use of concrete, large footprint, higher energy use and high chemical waste disposal.