11 Wastewater treatment devices, namely, onsite wastewater treatment system for removal of all nitrogen species present in wastewater comprised of a vessel made of any material suitable for containing microorganisms, for example, concrete, fiberglass-reinforced polymer, or polyethylene, and a medium for growing microorganisms made of any substance or material that is suitable for growing microorganisms, whether attached or suspended, for example, sand, rock, air, water, peat, wood chips, or manufctured media; trickling filters, namely, water filters for use in water or wastewater treatment facilities; sequencing batch reactors for use in water or wastewater treatment facilities