Patent ID: 6531062
Filing Date: 2003-03-11
Classification: C02F,Y02W,Y10S

Abstract:
A wastewater treatment apparatus for removing nitrogen from wastewater flowing from a primary sewage treatment system comprisinga bypass device which separates wastewater entering the apparatus into a first flow path and a second flow path; a recirculating media filter holding a filter media with the recirculating media filter including an input connection located above the filter media, a return pipe located below the filter media; a recirculation tank with an output, a first input connected to the return pipe of the recirculating media filter, and a second input connected to the first flow path of the bypass device and receiving wastewater from the return pipe and from the first flow path; a pump interconnected to the input connection of the recirculating media filter and to the recirculation tank and intermittently delivering wastewater from the recirculation tank to the input connection of the recirculating media filter; and a subsurface flow constructed wetland including a filter media and with an input interconnected with the output connection of the recirculation tank and with an input interconnected with the second flow path of the bypass device and also having an output for discharging wastewater from the wastewater treatment apparatus.