title: Packed-bed reactors for secondary effluent BOD and ammonia removal.
mesh_terms: D000641:Ammonia; D005374:Filtration; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D010865:Pilot Projects; D012722:Sewage; D014887:Weather
chemical_list: D012722:Sewage; D000641:Ammonia