DAFjärjestelmissä

DAFjärjestelmissä, often referred to as DAF systems, are a type of wastewater treatment technology. DAF stands for Dissolved Air Flotation. This process is widely used in industrial and municipal settings to remove suspended solids, oils, and greases from water. The core principle involves introducing fine bubbles of air into the wastewater. These bubbles attach to the suspended particles, reducing their density and causing them to float to the surface.

The DAF system typically consists of a tank where the flotation process occurs. Before entering the flotation tank, pressurized water is saturated with air. This micro-bubble-laden water is then released into the main tank. As the bubbles rise, they adhere to the contaminants. A skimming mechanism then removes the accumulated solids from the surface, leaving cleaner water behind.

DAF systems are effective for treating a variety of wastewaters, including those from food processing plants, paper mills, and oil refineries. They can significantly reduce the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) of the effluent. The efficiency of a DAF system depends on factors such as the type and concentration of contaminants, water flow rate, and the dosage of any added chemicals like coagulants or flocculants, which are often used to enhance particle aggregation before flotation. The removed sludge can then be further dewatered and disposed of or, in some cases, recycled.