Effect of ozonation combined with heterogeneous catalysts and ultraviolet radiation on recycling of gas-station wastewater

摘要: Abstract Ozonation is extensively applied in the treatment of drinking water and wastewater due to powerful oxidation potential ozone. Heterogeneous catalytic ozonation (HCO) proceeds through hydroxyl radicals as species. The effect alone combined with catalysts presence absence UV-radiation was investigated reuse biologically pretreated gas-station instead fresh water. Two types catalysts: titanium dioxide (TiO 2 ) activated carbon (AC) were studied. concentration catalyst, dark adsorption, reaction time improvement biodegradability combination reveals a significant removal contaminants present by using ozonation, adsorption or photocatalysis systems. Maximum dissolved organic (DOC) 91% achieved ozone, TiO system. But, an increase from 0.12 0.33 realised ozone Furthermore, increased increasing catalyst up 1 g/L 0.5 g/L AC.