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Introduction of Michigan Technology
DOF (Dissolved Ozone Flotation) System
Brief Description of the DOF technology
DOF is a single process that combines M-DAF and ozone.
M-DAF removes SS, turbidity, algae, oil, surfactants, and T-P, and ozone removes TOC, BOD, COD, color, odor, taste, and disinfection by-products, agents including virus and bacteria.
Removal of suspended matter, total phosphorus, and algae by flotation method by micro ozone bubbles
M-DOF System
Excellent Separation
Suspended solids, Turbidity,
Oils, Sufactants,
Total phosphorous,
Algae, etc.
Strong Oxidation
Disinfection of Virus, Bacteria
Removal of Color, Odor, Taste
Removal of BOD, COD, TOC, Hazardous Materials
Diagram of M-DOF
Process Diagram: P&ID
Core Technology
Patented technology that enables to compress strongly oxidative ozone gas into water up to 4 ~ 10kg/cm2, which was applied in M-DAF to generate numerous micro and nano ozone bubbles.
A Micro and Nano Bubble Generating System were developed. The sizes of generated micro and nano bubbles are smaller than 40㎛ and uniform without macro-bubbles, which makes it possible the dense bubble layer.
Hydrodynamic modeling has been conducted in the flotation basin for maintaining high density of bubble layer, which maximizes separation rates of solids and water in the flotation basin.
Advantages of Core Technologies of the DOF system
Contact efficiency of micro and nano bubbles with solids was maximized by maximizing surface area of micro and nano bubbles, which maximizes removal rates of floated flocs.
Minimized hydraulic retention time for reaction, and footprint of the plant by using a unique ozone compressing system of Michigan Technology
Various water quality parameters like SS, oil, surfactant, algae, TP, color, BOD, COD, TOC, and VOCs are removed in a single unit of DOF system
- Simplified System by combining DAF flotation and ozone oxidation processes
- Easy for construction and maintenance of the DOF system by combining two processes which minimizes control points
Quick response for the trouble shooting by accumulated experiences
Minimized Ozone facility by Maximizing ozone utilization rate of up to 98~99% in the DOF system
No need an extra ozone contact chamber and area
Electric power was minimized by minimizing ozone related facilities, and combing two processes
Application Area
