Dissolved Air Flotation ⁽¹⁸⁾

Equipment Selection Small rectangular DAF tanks usually adopt a chain-type scraper. For large rectangular DAF tanks (recommended span ≤ 10 m), a bridge-type scraper is commonly used. For circular DAF tanks (diameter 2–10 m), a planetary-type scraper is suitable. Sludge Removal Efficiency If large amounts…

There are several types of DAF tanks available. The choice depends on the characteristics of the water to be treated, the treatment requirements, and other specific conditions. Common types include horizontal-flow and vertical-flow tanks, square and circular layouts, as well as integrated designs that combine…

Adjust the dosage of coagulant based on the flocculation condition in the reaction tank and the effluent quality of the DAF unit, taking care to prevent clogging of the dosing tank. Observe the water surface in the DAF tank. If large bubbles appear in the…

Dissolved air pump flotation technology is a new type of flotation technology developed in recent years. This technology overcomes the disadvantages of conventional DAF systems, such as the need for multiple auxiliary devices, high energy consumption, and the production of large bubbles in vortex flotation…

DAF equipment is a water treatment system that separates suspended solids from water by attaching them to microbubbles, which rise to the water surface. In some cases, surfactants in the water attach to bubbles and float, enabling separation—this method is referred to as foam flotation.

A dissolved air flotation unit operates by introducing a large quantity of microbubbles into the wastewater. These tiny air bubbles attach to fine oil droplets and suspended solids, causing them to float to the surface, where they are separated from the water. This process enables…

The high-efficiency shallow dissolved air flotation unit integrates coagulation, air flotation, skimming, sedimentation, and sludge scraping into one system. It is cylindrical, compact in structure, and has a shallow tank, making it suitable for wastewater treatment of more than 1,000 cubic meters. The unit consists…

The vortex air flotation machine (DAF) is a new type of wastewater treatment equipment primarily designed to remove grease, colloidal substances, and solid suspended matter from industrial or municipal wastewater. The system mainly consists of an aeration device, a scum scraping device, and a sludge…

Dissolved Air Flotation (DAF) refers to the process of using highly dispersed microbubbles to adhere to pollutants in wastewater, forming a float with a density lower than water to achieve solid-liquid separation and liquid-liquid separation. It is suitable for removing suspended solids, oils, and fats…

Wastewater generated by industrial activities must undergo treatment before being discharged into the local sanitary network, returned to the natural environment, or reused. The diversity of industrial wastewater requires different types of treatment and systems. Dissolved Air Flotation (DAF) wastewater treatment systems are one of…

Impact of Flocculants and pH on Dissolved Air Flotation (DAF) Effect Generally, the higher the COD concentration in raw water, the more chemicals need to be dosed; the higher the concentration of suspended solids in raw water, the greater the amount of chemicals required. There…

Dissolved air flotation (DAF) is a long-established solid-liquid separation technology widely used in water treatment applications globally. Its principle involves introducing a large number of tiny air bubbles into wastewater. Through the interaction of bubbles with particulate matter facilitated by surface tension, including processes such…

The Dissolved Air Flotation (DAF) unit is a machine designed to remove suspended solids, plant oils, and various colloidal substances from industrial production and municipal engineering wastewater. This equipment is widely used in the treatment of industrial wastewater from industries such as refining, chemical, brewing,…

Dissolved Air Flotation (DAF) is a common wastewater treatment equipment widely used in various industrial and municipal wastewater treatment plants. It operates by dissolving gas in water, typically air, and then releasing the gas to form tiny bubbles. These bubbles attach to pollutants, causing them…

Dissolved Air Flotation (DAF) is a water purification process where air or other gases are introduced into wastewater to generate bubbles. These bubbles facilitate the attachment of fine suspended particles or solid particles, allowing them to adhere to the bubbles and float to the water…