Effect of Free Ammonia, Free Nitrous Acid, and Alkalinity on the Partial Nitrification of Pretreated Pig Slurry, Using an Alternating Oxic/Anoxic SBR

Figure 4

Evolution of (circle), -N (square), -N (triangle), and -N (diamond) calculated amounts inside the reactor during an operational cycle in the SBR on days 109 (Stage II) (a) and 221 (Stage III) (b).

(a)

(b)