Recent Advances in Understanding the Role of Wastewater …
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1(a) Partial nitrification
1(b) Partial nitrification (SHARON)
NH 4
+
NO 3
-
N 2
Treated
Wastewater
(100)
(100)
Partial
Nitrification
Denitrification
(100)
NH 4
+ / NO 2
-
NH 4
+
N 2
Treated
Wastewater
(100)
(50/50)
Partial
Nitrification
Anammox
(100)
2. Anammox
3. Canon
4.
x
Treated
Wastewater
(90/10)
(100)
Anammox
NH 4
+
N 2 / NO 3
-
Treated
Wastewater
(90/10)
(100)
Canon
NH 4
+ / NO 2
-
(1000/1*)
NH 4
+ / NO 2 (g)
N 2
Treated
Wastewater
(100)
(60/40)
NO x process
Denitrification
N 2
+ / NO 3
-
NH 4
+
Fig. 1 Flux diagram of (1a) partial nitrification, (1b) SHARON, (2) Anammox, (3) Canon and (4)
NO x process
Plant with NO x supply:
Nitrification
3NH 4
+
+ 3O 2 → N 2 + 4H 2 O + NO 2
−
+ 4H
+
(6)
Denitrification
NO 2
−
+ H
+
+ 3[H] → 0.5N 2 + 2H 2 O
( 7 )
Sum
3NH 4
+
+ 3O 2 + 3[H] → 1.5N 2 + 6H 2 O + 3H
+
(8)