Dissolved Air Flotation Units in Wastewater Pre-treatment Processes: Application and Advantages

The role of DAF units in wastewater pre-treatment processes is mainly reflected in the following aspects:

1.Removal of Suspended Solids: DAF units generate a large number of tiny bubbles, which attach to suspended solid particles, thereby increasing the buoyancy of the particles and causing them to float to the surface, facilitating separation and removal.

2.Reduction of COD Load: DAF units can effectively remove suspended solids from wastewater, which often contain high levels of Chemical Oxygen Demand (COD). Pre-treatment with DAF can reduce the COD load for subsequent biological treatment.

3.Improvement of Wastewater Biodegradability: Certain industrial wastewaters contain substances that inhibit microorganisms. DAF units can remove these substances, improving the biodegradability of wastewater and creating conditions for subsequent biological treatment.

4.Cost Savings: Compared to other pre-treatment equipment, DAF units have lower investment and operating costs, making them an economical and effective pre-treatment method.

5.Automated Operation: Modern DAF units are usually equipped with automated control systems that can achieve unattended operation, reducing labor costs and increasing the flexibility and convenience of operation.

6.Broad Application Range: DAF units are not only suitable for urban sewage treatment but also for the treatment of various industrial wastewaters, such as papermaking, textile, food processing, and other industries.

7.Enhancement of Subsequent Treatment Efficiency: Pre-treatment with DAF units can reduce the burden on subsequent treatment facilities and improve the efficiency of the entire sewage treatment system.

8.Environmentally Friendly: The treatment process of DAF units does not produce secondary pollution and is environmentally friendly, meeting modern environmental protection requirements.