Over time the membranes become dirty and clogged with all types of colloidal, organic, inorganic, and biological materials and need to be cleaned. Global Hydro Technologies membrane cleaning system clean the membranes and prolongs the lifespan by double or even triple the normal lifespan.
Fouling is the main culprit that causes membranes to stop working properly.
CAUSES OF FOULING
Calcium build up, fungi, polymers, silica, sand, you name it. All manner of contaminants pass through reverse osmosis and sea water desalination systems, causing the membranes to foul or clog. With a wide range of systems for your unit size, you are guaranteed a quality membrane cleaning system.
THREE WAYS FOULING CAN OCCUR
Soiling, precipitation, and absorption/adsorption. Soiling happens when colloidal particles like silica, clay and silt stick to the surface of the membrane. Precipitation takes place when the saturation level of a solution has reached its maximum. This causes the foulants to separate from the solution and bond with the surface of the membrane as they have nowhere else to go. These foulants must then be dissolved by chelating agents, which change the apparent solubility of the foulants, causing their dissolution.
Lastly absorption/adsorption occurs when biological agents are present in the solution. This includes fats, oils, proteins, greases and biological organisms which attach to the membrane and create biopolymers. Depending on the type of foulant, a special chemical or agent is needed to remove them from the membranes. Depending on the size of the unit and number of membranes, it injects the right chemicals into the system, which then clean the membranes and pressure vessels.