How to set the effective water depth of AAO process and main reaction tank in sewage treatment? Is there a prescribed scope?

The principle of AAO is the activated sludge process, so it is the premise of normal operation of the reaction tank to ensure that the activated sludge is suspended and not precipitated.

Therefore, the effective depth of the reaction tank needs to be determined according to the effective depth of the aeration equipment adopted. Aeration equipment not only undertakes the function of aeration, but also has the function of stirring and pushing flow. Because of its high power and good stirring effect, it is suitable for surface aeration equipment. For AAO process with blower aeration, the effective depth also needs to be determined by blower performance.

Once the effective depth of the reaction tank exceeds the performance of aeration equipment, sludge deposition will be difficult to avoid, which will lead to the gradual deposition and accumulation of inorganic components with high specific gravity in sludge. If it is not cleaned in time, the volume of the reaction tank will decrease, which will affect the normal operation of the system.