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Process Water Filtration

Utility water in used in a wide variety of ways depending on the type of process.  From chemicals to petrochemical plants, production water is a widely used commodity.  However, depending on the source of the incoming water- municipal water plant, well water or surface water - a number of filtration steps may be required to produce water that is acceptable for use in the application.  For example, incoming water may contain particulate and bacteria that can foul RO membranes, damage pump seals, clog nozzles, contaminate catalysts, etc, leading to costly repairs or downtime.

Proper water treatment is often a complex multi-stage process.    Depending on the contaminant load in the incoming stream it may be prudent to first treat with a coarse sand or multimedia followed by an activated carbon bed to remove dissolved organics.  Treatment may also involve the use of deionizing resins (to remove dissolved inorganic salts), reverse osmosis membranes (to reduce salts and dissolved organic material) special adsorbents to remove heavy metals, arsenic and lead, and ultraviolet light (to kill bacteria and other microbial contaminants).  Graver offers a number of products that can be used as part of a comprehensive water treatment process.

Pre-RO filters to protect the RO membranes from fouling
Tank vent filters prevent ingress of airborne mold and bacteria
Trap filters downstream of sand, resin and carbon beds
Prefilters to prevent particulate loading of carbon and ion exchange resins beds
Membrane filtration to produce high purity water quality
Absorbents to remove arsenic III which is not removed by the RO membrane

Graver Product Selection

Product Application Area
MBF™ or STC™ Melt blown depth filters for Pre RO filtration to prevent membrane fouling.  5 micron is most typically used.
MBF™ or STC™ Melt blown depth filters to trap any released sand, carbon or DI resins.  5 or 10 micron filters are recommended.
MBF™ or STC™ Melt blown depth filters are ideal for removing particulate upstream of carbon and resin beds to assure their maximum effectiveness.
ZTEC™ Final filtration when sub-micron purity levels are required.
TefTEC™ Hydrophobic PTFE membrane for tank vent applications.
Metsorb® HMRG Highly specialized adsorbent material removes heavy metals, lead and arsenic from water.  Metsorb even removes the Arsenic III, which is not readily removed by RO membranes (RO effective at Arsenic V removal)

© Graver Technologies, 2008.

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