Keeping a Completely Autotrophic Nitrogen Removal over Nitrite System Effective in Treating Low Ammonium Wastewater by Adopting an Alternative Low and High Ammonium Influent Regime
Table 1
Operating parameters of the CANON system.
Phase
High I
Low I
High II
Low II
Periods (d)
0–60
61–148
149–256
257–285
Cycle time (h)
8
4
8
4
Influent FA (mg N/L)
5–7
<3
7–10
<3
Influent -N (mg/L)
196 ± 18
77 ± 4.5
240 ± 21
61 ± 5.6
Volumetric exchange ratio
0.5
DO (mg O2/L)
0.2–0.4
0.2–0.4
0.2–0.4
0.4–0.6
Temperature (°C)
30
30
30
30
Aeration mode
3 aeration and anoxic stages in one SBR cycle (35 min/105 min, respectively)
50-min aeration stage in one SBR cycle
3 aeration and anoxic stages in one SBR cycle (60 min/60 min, respectively)
