Many industrial processes produce difficult to treat wastewater containing environmental contaminates, in the form of dissolved solids, which must be purified before being discharged. Typically, wastewaters are generated from metal finishing and plating operations, rinsing of printed circuit boards and semiconductors during fabrication, water used for cleaning and painting in automotive manufacturing, food and beverage (concentration of wastewater for reuse and reduction of BODs prior to discharge), pharmaceutical manufacturing, as well as landfill leachate. In many cases, wastewaters cannot be treated cost effectively. As a result, massive quantities of unpurified wastewater is land-applied for disposal, disposed of underground, or discharged into our surface water supply leading to a significant impact on the environment. It has been observed that all conventional membrane processes currently used for wastewater purification are hampered by some form of membrane fouling. When treating wastewater using an osmosis membrane process, significant pretreatment of the wastewater is typically necessary to protect the membrane from organic fouling, mineral scaling, and chemical degradation. Lynntech has developed an advanced osmosis membrane coating technology with greatly improved anti-fouling characteristics by successfully modifying commercially available osmosis membranes with graphene oxide and superhydrophilic nanoparticle coatings. These modified membranes showed excellent antifouling characteristics and improved durability under challenge tests using high concentrations of organic and inorganic foulants. Furthermore, the modification process is universally transferable to all commercially available membrane technologies used for wastewater purification.

Enhanced non-fouling membranes for water purification and recycling

253rd National Meeting (2017)

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