Sponge as Carrier and Applying It for Anammox in an Up-flow Column Reactor

In order to study the feasibility of using sponge as carrier and applying it for ANAMMOX research,experiments were carried out in an up-flow column reactor with synthetic high nitrogen wastewater as influent.The operational results showed that the TN removal efficiency as high as 75% was obtained at a high volumetric loading rate of 3.5 kg/(m³·d) and a short HRT of 3.1 hours with the synthetic wastewater as the influent.At steady operation,the liquid pH value in the bioreactor was alkaline.The ratio of NH₄-N removal,NO₂-N removal and NO₃-N production are 1∶1.21∶0.19.Compared with other carriers(Biofill and PVA-gel),the start-up period for the reactor of sponge as carrier is shorter,and the operation is simple.And also it showed potential for treatment of wastewater with high concentrations of NH₄-N using a short hydraulic retention time.