Wastewater treatment is quietly reinventing itself. The old way — dump energy into the problem — is getting replaced by something a lot smarter. Enter anammox, short for anaerobic ammonium oxidation. It’s a microbial process that pulls nitrogen out of wastewater with barely any energy input. No aeration, no carbon source, no drama. Just bacteria doing their thing. But anammox has a dirty secret: it’s hypersensitive. And real wastewater, especially from farms and pharma plants, is never clean. It’s a cocktail. Antibiotics swimming alongside heavy metals. That changes everything. The Two Troublemakers: Oxytetracycline and Zinc Oxytetracycline, or OTC, is everywhere in livestock operations. Farmers use it to treat infections and,…