[Effect of Different Ratios of Anaerobic Time and Aeration Time on the Operation of a Continuous-Flow Reactor with Partial Nitrification Granules].

A continuous flow reactor was inoculated at 25-28℃ with mature partial nitrification granular sludge. In order to avoid the granular sludge being crushed because of the sludge backflow through the peristaltic pump, a built-in sedimentation zone was used for internal backflow. The experiment investigated the influence of the different anaerobic time to aeration time ratio (1:1, 2:1, and 1:2) on the stability of a continuous-flow partial nitrification granular sludge system.

[Effect of On/Off Aeration Time Ratio Under High Frequency On/Off Aeration on Performance of Nitrosated Granular Sludge].

The inhibition of the on/off aeration time ratio on nitrite oxidizing bacteria (NOBs) in intermittent aeration is the key to accumulating nitrite. This study explores the stable operation of nitrosated granular sludge under the same frequency of aeration and different combinations of stop exposure time. At 25-28℃, aerobic granular sludge was inoculated into a sequencing batch reactor (SBR) (R0) and acclimatized to nitrosated granular sludge by intermittent aeration and dissolved oxygen (DO) restriction.

[Effect of Step Aeration on a Municipal Sewage Aerobic Granular Sludge System].

In order to achieve simultaneous nitrogen and phosphorus removal in low-C/N urban sewage, a sequencing batch reactor (SBR) was operated in anaerobic/aerobic (A/O) mode. Keeping the total aeration volume at 900 L, the aeration strategy was adjusted. The uniform aeration of 2.

[Startup and Stabilization of Nitrosation in an Anoxic-aerobic Continuous-flow Reactor with Granules].

Matured nitrosation granules were inoculated to an anoxic-aerobic continuous-flow reactor at room temperature (17-19℃). The startup and stabilization of nitrosation with granules were studied. The results show that the nitrosation of the continuous-flow was successfully achieved with an average nitrite accumulation rate (NAR) above 95%.

[Effect of Different Ratios of Anaerobic Time and Aeration Time on the Formation of Partial Nitrification Granules].

Flocculent sludge with good nitritation performance and MLSS and SVI values of 3500 mg ·L and 162 mL ·g, respectively, was inoculated in the R1, R2, and R3 groups of the same SBR reactors at room temperature (22-28℃). The effects of different anaerobic time and aeration time ratios (1:2, 1:1, and 2:1) on the formation of partial nitrification granular sludge were studied. The results showed that granules in three reactors were successfully formed at 103 d, 82 d, and 64 d.