Nitrogen removal in the overland flow wastewater treatment process - removal mechanisms

Abstract

Pilot-scale overland flow slopes were used to identify and study the nitrogen removal mechanisms in the overland flow process. Primary effluent was applied at several application rates and schedules of wetting and drying. Removal of ammonia and generation of nitrate varied considerably during wastewater application, leading to the con clusion that steady-state conditions could not be assumed. A hypothesized sequence of nitrogen conversion and removal was tested in several ex periments. Ion exchange of ammonia played a prominent role in nitrogen removal. Res. J. Water Pollut. Control Fed, 62, 867 (1990).