Simultaneous Removal Of Sulfide, Nitrate And Ammonium Ions From Wastewater In One Reactor

Simultaneous removal of sulfide, nitrate and ammonium salts was achieved in an upflow anaerobic sludge blanked (UASB) reactor by the start-up strategy of gradually decreasing influent nitrite to null. The sulfide/nitrate-nitrogen ratio could affect the distribution of end products of sulfur, and a sulfide/nitrate-nitrogen ratio of 1:0.76 is proposed as optimum for S-0 accumulation. The Denittrasoma, Thiobacillus, and Condidatus_Kuenenia presented the functional strains in the studied reactor. This result can provide a theoretical and technical basis for the large-scale application of anaerobic ammonium oxidation process.