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Improved Titanium Dioxide Photocatalysts for Highly Efficient Removal of TOC from Wastewater

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Background: Reverse osmosis (RO) membrane technology has been widely applied in the wastewater recovery processes either via conventional process or membrane bioreactor (MBR) process. However currently only 75~85% clean product water can be achieved by utilizing RO membrane for wastewater recovery. The remaining 15~25% RO concentrate is brackish waste which is harmful to the environment due to high organic content and has to be disposed. Technology Description:This technology relates to an improved titanium dioxide photocatalysts for degradation of organic substances in wastewater. The porosity morphology and particle size of the titanium dioxide photocatalysts play an important role in its degradation capability. This technology comprises an agglomerate or aggregate of titanium dioxide particles wherein the particles have an anatase crystal structure and the agglomerate or aggregate having a size of approximately 1 – 3 micrometers. 1) Catalyst loading at ~0.1% wt 2) Operating temperature range 5 – 95 degree Celsius 3) Irradiation wavelength range: 200-~600 nm UV or sunlight 4) Catalyst can be separated via microfiltration easily Applications: 1) RO concentrate recovery 2) Removal of organics from wastewater from industries such as palm oil food brewery pharmaceutical chemical etc. Patent Status: Patent pending Opportunity for collaboration: 1) Licensing 2) Partnership for further development


Advantages: 1) 5x faster than existing commercially available benchmark photocatalysts 2) Simple application method 3) Easy regeneration 4) Save $1.3million annually for a semiconductor factory with 3000 m3 wastewater disposal Benefits: By applying this technology to the brackish waste additional 137000 cubic meters of clean water can be produced daily for a 5-million population city. When this technology is applied to a semiconductor factory with 3000 m3 of wastewater disposed daily cost savings is $5490 daily and $1.3 million per year.

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Patent pending Opportunity for collaboration: 1) Licensing 2) Partnership for further development