Ammonia nitrogen in sewage stripping exceeds the standard
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My unit's sewage stripping unit handles catalysis, hydrocoking, atmospheric and vacuum tower top water injection, etc. The raw materials are complex, so the ammonia nitrogen in purified sewage often exceeds the standard, which affects the normal operation of the sewage treatment plant. What should I do?
You can try 1) increasing the amount of stripping steam, and/or 2) adding a little alkali solution, but it must be added to the feed of the tower. After addition, the molar concentration of alkali in the feed should not exceed 50% of the current molar concentration of NH4 at the bottom of the tower.