Ultrafiltration
Ultrafiltration involves passing water through a porous polymer membrane to physically remove suspended solids to improve water quality. Porosity can be as small as 0.01 micron (10 nm). Filtration to this level can also remove many bacteria, virus and high molecular weight dissolved compounds.
Reverse Osmosis
Osmosis is the phenomenon of a solvent (in this case water) to move through a semipermeable membrane from an area of lower dissolved solids to an area of higher dissolved solids in an attempt to bring the concentrations to equilibrium. This results in osmotic pressure through the membrane. By applying an external pressure in excess of the osmotic pressure to the higher dissolved solids side of the membrane the action can be reversed (i.e. reverse osmosis). This allows for the production of a water supply with greatly reduced dissolved solids. With the appropriate membrane and pressure differential, dissolved solids reduction in excess of 99% is possible.
Applications
Surface water clarification
Well water clarification
Disaster relief
Cryptosporidium and giardia removal
Wastewater reuse
Replace coagulation, flocculation settling process media
MBR systems
Pre-filtration for reverse osmosis
Landfill leachate
Food processing wastewater
Car wash effluent
Tool coolant reclaiming
Silt removal
Pond clarification