Effluent from wastewater treatment plants typically is discharged to surface water. There are a few applications in which WWTP effluent is being polished by sandfilters. This polished effluent is re-used for low grade non-potable applications.

High grade re-use applications or even potable applications were not possible because the current polishing step (sandfilters) will not remove micro biology and dissolved substances, such as nitrate and salinity. The treatment technology needed for removal of salinity is reverse osmosis, however reverse osmosis membranes are susceptible to micro biological fouling and silt that passes through sandfilters.

X-Flow’s hollow fibre UF membrane will screen all turbidity and micro biology. The X-Flow UF membrane will provide a simple solution that will produce water that meets the highest standards for turbidity and micro biology. The water can either be re-used directly (if salinity and dissolved substances are within limits) or fed to a reverse osmosis system (to remove salinity and dissolved substances). X-Flow’s hollow fibre membrane is available in two configurations:

• XIGA™ - Multiple membranes (up to 4) installed in horizontal membrane housings.
• Aquaflex - Single membranes installed vertically and connected directly to feed and filtrate headers.

The X-Flow XIGA™ and Aquaflex membrane modules are being produced with ISO 9000 certification.