How to remove ammonia nitrogen in the aerobic tank of traditional push-flow processes
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In the traditional push-flow process, the length-to-width ratio of the aerobic tank is 10:1; water enters at the surface and exits through overflow, with a retention time of 35 hours. There is no A zone nor internal recirculation. How can the removal efficiency of ammonia nitrogen be improved, and what is the maximum achievable removal rate for ammonia nitrogen?
Is the aeration tank in the traditional push-flow process anaerobic?
1. It is necessary to increase the dissolved oxygen at the export; raise it by one unit above the normal range, with adjustments made based on actual operating conditions； 2. Extend the sludge age; this is quite important, as a short sludge age is not conducive to the reproduction of nitrifying bacteria ； 3. Appropriately reduce the return flow rate from the secondary sedimentation tank.