Norit Asia Pacific is to supply of X-Flow XIGA™ ultrafiltration (UF) membranes to the Lower Seletar Waterworks project in Singapore to be constructed by Sembawang Engineers & Constructors.
With the capacity to process 300,000 m³/d of raw water into drinking water the Lower Seletar Waterworks will be one of the largest drinking-water plants in Singapore that utilizes UF at the front of its treatment process. It is also the first drinking-water plant in Singapore to use a pressurized UF membrane system.
XIGA UF membranes are widely used throughout the world for large-scale drinking water production and effluent reuse. They are horizontally mounted membranes that can be housed in pressure vessels like conventional reverse osmosis (RO) membranes.
The pressure vessels will be stacked up on a skid to reduce the footprint of the membrane system. Norit’s UF membrane system is well suited for the limited footprint of the Lower Seletar plant.
In addition, the absolute pore size of XIGA membranes ranges from 0.025 to 0.030 microns, which makes it one of the tightest in its class. This enables high log removal for both bacteria and viruses.
“The use of XIGA membranes for drinking water production could potentially reduce the cost of downstream disinfection and provide cost savings for the end-user,” explained Duane Schlicht, managing director of Norit Asia Pacific.