Rainy Season Influent Dilution Causing Carbon Deficiency: Sodium Acetate Supplement Practice

In southern rainy seasons, influent is diluted by rainwater, BOD5/TN drops, denitrification carbon is insufficient and TN rebounds. It is advisable to emergency-dose sodium acetate in the anoxic zone and adjust dosing rate by diluted water quality; after rain it can be gradually tuned back.

Establishing a rainy-season carbon source dosing plan is a practical way to ensure stable TN compliance.