Tasneem Water Treatment Co. LLC.

  Membrane Cleaning Skid

Purchasing an RO unit is an investment. So why then would you not want to protect that investment? Deep inside of every reverse osmosis system we manufacture are semi-permeable membranes. These membranes are the heart of the unit. They are what remove all the suspended solids and particles from dirty brackish and tap water. Over time they become dirty and clogged with all manner of colloidal, organic, inorganic, and biological materials and need to be cleaned. Membrane cleaning systems are what do this. Depending on the type and size of the system, Pure Aqua, Inc. manufactures them according to your project.

The membrane cleaning system is designed for manual operation through a local control box located on the skid. A chemical storage tank is mounted on its own stand and connected to the skid with either hard PVC piping or quick disconnect fittings and flexible hoses. This gives the unit the ability to be mounted in a permanent location or totally portable if desired. The piping is schedule 80 PVC that is hydrostatically tested at the factory. The electrical enclosure is NEMA 4X. All skid wiring is completed and tested before shipment.

Membranes are the heart of your reverse osmosis unit. And just like your heart, they need to be taken care of and kept healthy so that they can continue to work to keep your water treatment system alive. Having to replace membranes because of fouling and clogging can become costly and annoying. Not to mention, it can become a huge set back causing hold-ups within your water treatment project.

Fouling is the main culprit that causes membranes to stop working properly. It can be caused by many different things such as: 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.

There are three main 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.

Standard Features

The membrane cleaning skid is designed for manual operation through a local control box located on the skid. A chemical storage tank is mounted on its own stand and connected to the membrane cleaning skid with either hard PVC piping or quick disconnect fittings and flexible hoses. This gives the unit the ability to be mounted in a permanent location or totally portable if desired. The piping is schedule 80 PVC that is hydrostatically tested at the factory. The electrical enclosure is NEMA 4X. All membrane cleaning skid wiring is completed and tested before shipment.

• Skid mounted unit
• Chemical solution tank with cover
• PVC piping
• 316L Stainless cleaning pump
• 5 micron cartridge filter with stainless steel housing (CS8) or polypropylene (CS4)
• Local flow meter
• Tank level switch (CS 8)
• 220V/1Ph/60Hz or 460V/3Ph/60Hz

Available Options

• 220V/1Ph/50Hz or 380-415V 3Ph 50Hz
• pH Controller
• Electric heater for chemical tank with
• temperature controller
• Flexible hoses for cleaning connection
• Wheel mounted skids for smaller units
• Mixer

Applications

• Membrane cleaning
• Descaling