What is the sewage treatment plant looks like in your mind? Reinforced concrete sedimentation tanks, smelly, dirty, disorderly environment? No! The first "botanical garden" type sewage treatment plant will start to build and put into operation! Recently, it is reported that a "botanical garden" type sewage treatment plant has been built in the coast of Wu Song Shanghai, which introduced more than 3,000 species of plants and microorganisms, such as Datura flowers, Periwinkle, European alder, Canna, and is expected to be operational next year; by then , this botanical garden which uses the food chain reactor sewage treatment technology can not only improve the urban environment, but also can handle more than 40,000 cubic meters of polluted water for the urban residents every day.

 

Wet air oxidation method is proved to be an effective wastewater treatment technology, and already has been used in a large number of organic or polluted water containing toxic chemicals which the conventional biological treatment methods are not very effective; however, the strict reaction conditions cause the very expensive equipment and transportation costs, and therefore this method is rarely used in the treatment of organic industrial waste water. There has been a lot of research work on photocatalysis for the terms of general organic waste water treatment, foreign countries have large-scale photocatalytic degradation of organic wastewater and deeply processing experiments of drinking water, and furthermore Europe has been conducting experiments on photocatalytic purification of the river.

 

Tungsten trioxide (WO₃) is the most common form of tungsten oxide, which is produced by controlling the appropriate reaction conditions, has the properties of electrochromic, gas sensitivity, semiconductor and so on. As one of semiconductor photocatalysts, WO₃ can be used for the photocatalytic degradation of organic, dye and papermaking waste water; also it can be used to deal with inorganic pollution and inorganic synthesis; at the same time, it also plays an excellent effect on the photocatalytic decomposition of water to produce hydrogen. In addition, WO₃photocatalyst plays an effective role in the treatment of organic phosphorus pesticide, dye wool and chlorinated organic compounds waste water ect..