What are the biological nitrogen removal processes? What are the main control parameters?

At present, 1 and AAO processes are commonly used, and the treatment effect is good: the parameters are dissolved oxygen, sludge reflux ratio and influent load.

2. Biological aerated filter process: control aeration and backwashing time of the filter.

3. Biological activated carbon filter: controlling backwashing intensity and backwashing time;

4. Zeolite adsorption filter: control water inflow, flow rate, backwashing intensity and time.