1. Prepare sludge: An appropriate amount of activated sludge can be obtained from the secondary sedimentation tank, which contains abundant microorganisms.
2. Add built-in filler: Add the built-in filler to the reaction zone of the BAF reactor.
3. Inoculate sludge: Adopt the method of inoculating activated sludge, for example, take activated sludge from the anoxic tank and aerobic tank separately, then insert a steel pipe into the filling material, pour for about 10 minutes, and pour activated sludge into each tank one by one until all tanks are filled.
4. Closed aeration cultivation: After completing the sludge inoculation, open the inlet valve to introduce water into the tank. When the water level reaches the upper edge of the backwash drainage tank, open the inlet valves of each tank for aeration and conduct 48 hours of closed aeration. After a period of incubation, the supernatant is discharged, and then the wastewater to be treated is added to continue incubation for a period of time. Then, water and air are continuously introduced until steady-state operation is achieved. Through exposure, sufficient oxygen can be provided to microorganisms to promote their growth and reproduction.
5. Continuous cultivation: After 48 hours of exposure, open the inlet valve to continuously feed water into the BAF tank, and use the designed flow rate for continuous cultivation in order to obtain a more stable biomass.
During the vaccination process, it is important to note that the air intake should not be too high to avoid loss of fillers. In addition, the specific inoculation method and operating parameters may vary depending on factors such as the type of BAF reactor and the quality of treated water. In practical operation, adjustments and optimizations can be made according to specific situations.
BAF (biological aerated filter) is a commonly used wastewater treatment process that utilizes the metabolic activity of microorganisms to remove pollutants from water. The purpose of inoculating sludge is to introduce a microbial community with the ability to degrade pollutants, gradually grow and reproduce in the BAF reactor, form a stable biofilm, and thus improve the sewage treatment efficiency.
