• Removal of contaminants from water, such as the process involved in sewage treatment
• Management of industrial waste water to ensure legal compliance
• Ability to produce clean drinking (potable) water cost effectively and efficiently near to where the water is needed.
The water treatment sector predominantly uses the membrane bioreactor process to filter water and faces a continual problem of membrane contamination. This is both costly and causes frequent downtime.
G2O’s graphene oxide membrane surface design has a series of stacked nanoplatelets. This creates several layers of microscopic channels through which only water can pass. In fact, it repels more contaminants and operates four times longer than a traditional membrane before it needs cleaning.
One reason for the membrane’s effectiveness is that less pressure is needed to pass the water through a G2O-coated membrane compared with a traditional membrane.
Using a fixed flux (the amount of water flowing through a membrane) of 20l/m2.hr, a traditional membrane needs cleaning or replacement after 27 hours compared with 105 hours for G2O’s membrane – an almost four-fold improvement. This dramatically reduces plant downtime for membrane cleaning and replacement.
The G2O graphene oxide membrane efficiency means water treatment plants’ footprint can be reduced. This means there is the potential to improve greatly the provision of water treatment facilities, particularly in emerging countries, as it becomes more cost effective to create more plants and offer growing populations increasing access to clean, potable water.