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Discover Articles, Tips & Information on Water Filtration & Treatment Products from Everlift – “The Filtration People”

How to Improve the Performance of RO Units

Membrane filtration is a very effective way to remove dissolved substances in water. However, the membranes can become quickly clogged or fouled if the water has not been pre-treated appropriately. First, suspended solids 5 micron and larger need to be removed. This may involve a single step using a 5 micron multi-media filter. Or, if the concentration of suspended solids is high, a clarifier, a DAF (Dissolved Air Flotation) unit, or a hydro-cyclone filter may be needed prior to the multi-media filter in order to remove the larger suspended solids.

Once the particles larger than 5 micron have been removed and any remaining smaller particles are at a low concentration, attention has to turn to the removal of dissolved organics. This is accomplished by installing an activated carbon filter. In cases where the water going to the membranes is hard, a water softener should also be part of the treatment process.

This may sound like a long, complicated process, but pre-treating water before it reaches membranes is essential to maintain optimum efficiency of the membranes and minimize maintenance and replacement. A water analysis, including a particle size distribution, would go a long way in helping Broken Arrow understand which pre-treatment steps are needed to solve its current problem.  Algae is an immediate problem, but it may not be the only issue that should be addressed.

Are you Using Coagulants?

Adding coagulants to wastewater can greatly improve the efficiency of removing suspended solids. This is particularly true when there are substantial numbers of very small particles.  However, the flocs created by most coagulants are typically “sticky” and will adhere to filter media with which they come into contact. This occurs most frequently when the filterContinue Reading

Is Activated Carbon The Only Way To Remove Color From Water?

Activated carbon is the most common method of removing color from water, but it is not always the most appropriate method.  Sometimes the color in water comes from very small particles of suspended solids and not from dissolved solids.  The particles imparting the color are so small they cannot be seen with the naked eye,Continue Reading