Nanometer TiO2 photocatalytic Technology is an AOT technology(Advanced Oxidation Technology).TiO2 has good chemical stability, high hardness, high wear resistance, harmless to the human body and environment, rich resources and low price, therefore it is widely used in sewage treatment, air purification, environmental protection, medical and health antivirus, sterilization, pollutant treatment and other fields.

nanometer TiO2 photocatalytic oxidation reaction process and reaction equations as follows:

TiO2+hv→h+ + e- 

h+ + e-→E 

H2O→H+ +OH-

h+ +OH-→·OH 

h+ +H2O+O2-→·OH+H+ +·O2- 

h+ +H2O→·OH + H+ 

e-+O2→O-2 

·O-2 + H+→HO2· 

2HO2·→O2+ H2O2

H2O2+·O-2→·OH+OH- +O2 

Nanometer TiO2 photocatalytic technology is also widely used for water treatment in the swimming pool.In the swimming pool project, it is the successful cases of nanometer TiO2 photocatalytic technology that indoor swimming pool of Sweden Sundbyberg and spa center of Sweden Nova Park Conference adopted the Wallenius AOT advanced oxidation technologies. public baths water quality standard CJT 325-2010, public bath water supply and drainage engineering discipline CJJ160-2011

Application case: Spa center of Sweden used the AOT equipment system,which adopt the method of full flow disinfection. the pool with higher water temperature is used by about 500 visitors a day. it not only ensures the water hygiene standards,but also makes chloride reduce to a minimum. the water quality test result is only to get the combined chlorine content 0.15-0.04 PPM. the use of the advanced oxidation technologies of nanometer TiO2 photocatalytic makes the water quality has always been very ideal, that the change of water reduce makes the operation and maintenance cost greatly reduced.After that, AOT equipment system has been further promoted and applicated.

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