How does the high efficiency dissolved air flotation machine achieve effective treatment of industrial wastewater?
Publish Time: 2025-05-20
The high efficiency dissolved air flotation machine plays a vital role in the treatment of industrial wastewater. It can effectively remove suspended matter, grease and other tiny impurities in the water through a series of precisely designed steps and mechanisms. This equipment uses tiny bubbles generated when dissolved gases are released. These bubbles come into contact with pollutants in the wastewater and bring them to the surface of the water, thereby achieving solid-liquid separation or oil-water separation. Next, we will explore how the high efficiency dissolved air flotation machine can achieve effective treatment of industrial wastewater.First of all, the core of the high efficiency dissolved air flotation machine lies in its unique dissolved air system. In this system, air is pumped into a closed container at high pressure and is fully mixed with water in the process. Due to the effect of pressure, the air is dissolved in the water to form a saturated state. When this water flow containing a high concentration of dissolved gas passes through the pressure reducing valve and enters the flotation tank, the dissolved gas is quickly released to form tiny bubbles due to the sudden drop in pressure. These bubbles are extremely small in size, so they have a large specific surface area and can more effectively adsorb fine particulate matter in the wastewater.As these tiny bubbles rise to the surface, they capture and carry suspended solids, grease and other light pollutants in the wastewater. This process relies not only on the physical adsorption between the bubbles and the pollutants, but also on the charge interaction between them. Many pollutants have a negative surface charge, and bubbles usually have a certain charge. The electrostatic attraction between the two helps to enhance the capture efficiency of pollutants. In addition, bubbles can also change the density distribution of the surrounding liquid, further promoting the migration of pollutants to the water surface.In order to ensure efficient separation, the design of the flotation tank is crucial. The flotation tank usually has a specific structure inside to guide the direction of water flow, so that the water flow containing bubbles can be evenly distributed in the tank body, maximizing the chance of contact between bubbles and pollutants. At the same time, the flotation tank must have sufficient residence time so that the bubbles have enough time to bring the pollutants to the surface of the water to form a scum layer. This scum can be collected and removed by a scraper to achieve the purpose of purifying the water quality.Another key factor is the addition of reagents. In some cases, in order to improve the flotation effect, chemical reagents such as coagulants or flocculants are added before the water enters. These agents can change the surface properties of colloidal particles in wastewater, making it easier for them to aggregate into larger aggregates, which in turn facilitates bubble capture. Although not all application scenarios require agent assistance, proper chemical pretreatment can often significantly improve treatment efficiency when treating industrial wastewater with complex components.It is worth noting that the operational flexibility of the high efficiency dissolved air flotation machine is also a major advantage. According to different wastewater characteristics, operators can optimize the treatment effect by adjusting the operating parameters of the dissolved air system (such as pressure, gas-water ratio, etc.) and the flow conditions in the flotation tank. This flexibility makes the equipment suitable for a variety of industrial wastewater treatment tasks, whether it is food processing wastewater, papermaking wastewater or chemical wastewater, a suitable treatment strategy can be found.In short, the high efficiency dissolved air flotation machine has demonstrated excellent performance in the field of industrial wastewater treatment with its advanced dissolved air technology, reasonable tank design and possible chemical assistance. By creating a large number of tiny bubbles and introducing them into the wastewater, the equipment can effectively separate various difficult-to-treat pollutants from the water, providing strong support for the realization of clean production. With increasingly stringent environmental protection requirements and continuous technological advancement, high efficiency dissolved air flotation machine will undoubtedly play a more important role in future industrial wastewater treatment.
