Predicting Accumulation of Intermediate Compounds in Nitrification and Autotrophic Denitrification Processes: A Chemical Approach

Table 4

calculation of the redox half-reactions involved during ammonia oxidation and autotrophic denitrification processes under the operating conditions of each studied stage.

Nitrification	N2O reduction to	O2 reduction to H2O	reduction to
	(V)	(V)	(V)
Stage 1	1.49	0.79	0.30
Stage 2	1.49	0.79	0.30
Stage 3	1.49	0.79	0.30
Stage 4	1.49	0.79	0.30
Stage 5	1.49	0.79	0.30
Stage 6	1.49	0.79	0.30
Stage 7	1.49	0.79	0.30
Stage 8	1.49	0.79	0.30
Stage 9	1.49	0.79	0.30
Stage 10	1.49	0.79	0.30
Stage 11	1.49	0.79	0.30
Stage 12	1.49	0.79	0.30
Autotrophic denitrification	reduction to N2	reduction to N2	reduction to HS^-	S reduction to HS^-
	(V)	(V)	(V)	(V)
Stage 1	0.70	-0.19	-0.27	-0.34
Stage 2	0.68	-0.21	-0.28	-0.35
Stage 3	0.64	-0.26	-0.32	-0.36
Stage 4	0.59	-0.31	-0.37	-0.38
Stage 5	0.72	-0.17	-0.25	-0.33
Stage 6	0.67	-0.23	-0.29	-0.35
Stage 7	0.66	-0.24	-0.31	-0.36
Stage 8	0.70	-0.19	-0.26	-0.34
Stage 9	0.70	-0.19	-0.26	-0.34