WATER AND WASTEWATER TREATMENT SYSTEM OR METHOD USING DISSOLVED OZONE FLOTATION(DOF)

摘要

DOF is an acronym consisting of Dissolved Ozone Flotation subscript, it referred dissolved ozone injury unit. DOF (Dissolved Ozone injury unit) refers to a process that is combined with the water treatment (drinking water treatment) and to wastewater treatment with strong oxidizing power of high suspended solids removal capability and the ozone DAF (Dissolved Air Flotation, Dissolved air flotation device) . Working principle of DAF (dissolved air flotation) is taking a portion of the water has already been treated in a pressure vessel Applying pressure to above atmospheric pressure air that there is a 3 to 7 dissolved in water in a pressure vessel with water to process the thus pressurized water and a method of mixing processing. There are a number of air dissolved ln the pressurized water when the pressure is not exposed to atmospheric pressure (1 atmospheric pressure) when water and mixed to handle when pressurized to 3-7 atm dissolve the very fine bubbles (micro bubbles, air was 10~120㎛ ) it is to be deposited. The thus contains suspended solids in a myriad of micro-bubbles in the water are precipitated to the surface to be processed, thereby injury. After the removal of the flotation material (sludge) is how the water is being processed. So that made this series of courses is designed as a continuous unit DOF.; DOF is a method of using ozone in the air instead of the DAF. DOF is a fine ozone bubbles and precipitates, and when the dissolved ozone in place of air in the pressure vessel with water and mixed to be processed. So the ozone micro-bubbles formed is dry and thereby so the contact area with the water to be processed infinitely wider maximize the use efficiency of ozone. However, ozone is because it has a strong oxidizing power to a number of roles in the water treatment and wastewater and treatment. Among them it is anhydrous such as taste, odor, color removal and disinfection (sterilization), removal by oxidative decomposition of the toxic substances. Thus, DOF is a device that combines the strong oxidation power of ozone and DAF for the removal of suspended solids.