Dissolved air flotation machine is an efficient water treatment equipment, whose core function is to achieve rapid separation of solid-liquid or liquid-liquid through physical methods. It is widely used in the purification treatment of various industrial wastewater and municipal sewage. Its working principle is based on dissolved air release technology, which dissolves air in water under high pressure to form a group of fine bubbles, and then suddenly releases them under reduced pressure. The bubbles combine with pollutants such as suspended solids, colloidal particles, or oil droplets in the water to form flocs with a density lower than that of water. With the help of buoyancy, they quickly float to the surface of the water, achieving the separation of pollutants and clean water.
In the industrial field, dissolved air flotation machines have significant treatment effects on oily wastewater, papermaking wastewater, printing and dyeing wastewater, etc. For example, in the petrochemical industry, it can efficiently remove oil and suspended solids from wastewater, reducing the load of subsequent biochemical treatment; In the food processing industry, organic compounds such as proteins and fats can be effectively separated from wastewater to reduce COD (Chemical Oxygen Demand) concentration. In addition, the device is equally efficient in removing small particles such as algae and fibers, and can significantly improve water transparency.
In municipal sewage treatment, dissolved air flotation machines are often used as pre-treatment or advanced treatment units. As a pre-treatment, it can reduce the pressure on subsequent sedimentation tanks or biological treatment systems; As a deep treatment, it can further remove fine suspended solids remaining after biological treatment, improve effluent quality, and meet reuse or discharge standards.
Its advantages lie in high processing efficiency, small footprint, flexible operation, and strong adaptability to water quality fluctuations. By adjusting parameters such as dissolved gas pressure and release type, the treatment effect can be optimized for different water quality characteristics, which is an important key equipment in modern water treatment processes.