Continuous sand filtration system with air addition to facilitate removal of ammonia from wastewater.
DynaSand® Oxy delivers ammonia, TSS and BOD removal in a single stage for tertiary treatment of final effluent discharge from sewage and industrial wastewater treatment plants.
DynaSand® Oxy is a continuous sand filtration system with air addition to facilitate removal of ammonia from wastewater.
Primarily designed for ammonia removal, for which it delivers removals down to 2 mg/l, the DynaSand® Oxy can also provide removals of effluent phosphorus down to 0.2 mg/l as well as effluent BOD and TSS down to 10 mg/l. Read about the year-long optimisation trial at Watton Water Recycling Centre.
As the water flows upwards through the filter bed, ammonia is converted into nitrate by bacteria - Nitrosomonas and Nitrobacter - which form a layer on the surfaces of the filter grains. The bacteria, which are autotrophic and thus live only on inorganic materials, produce new biomass out of carbon dioxide.