Abstract
Anammox reaction was started by inoculating sewage plant digested sludge, and the change of N element in the reactor was detected. It was found that Anammox needed to go through three parts: hydrolysis period, activity lag period and activity increase period. The effect of different Fe2+ concentrations on the denitrification rate was investigated with the well-run Anammox sludge as the inoculation sludge. The results showed that Fe2+ had a positive effect on the anaerobic ammonium oxidation reaction within a certain concentration range, while the denitrification effect would be inhibited if the concentration was too high. When the concentration of Fe2+ was 0.08mmol/L, Fe2+ on Anammox had the best denitrification effect.
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