Study on Long-term Effect of Oxytetracycline on ANAMMOX Nitrogen Removal Performance in the Treatment of Salt-containing Wastewater

The effects of oxytetracycline on anaerobic ammonium oxidation (ANAMMOX) were analyzed in this study. Meanwhile, the change specific ANAMMOX activity (SAA) and content heme c also revealed. performance reactor decreased gradually when increase OTC concentration from 2mg/L to 10mg/L under 10‰ salinity. nitrogen removal almost collapsed until elevation 10 mg/L OTC, observed with a huge decrease SAA 77.71% 88.04%. After no addition into reactor, system recovered within 20 days. At end phase, NH 4 + -N was completely removed, NO 2 - removed above 99%, total efficiency 85.33%.