ABSTRACT
This chapter provides a review of findings from second year of operation of the Unified Sewerage Agency’s Jackson Bottom Experimental Wetland (JBEW). JBEW was developed to test natural means of providing tertiary treatment for phosphorus and nitrogen and achieve biodiversification in a monotypic wetland. The JBEW is a 15-acre treatment wetland composed of 17 linear cells, each a combination of shallow and deep segments. Wastewater treatment at the USA Hillsboro Facility affords standard secondary treatment through activated biofilter, aeration basin, and secondary clarification processes. Objectives for the 1990 monitoring program at JBEW were to: evaluate wetland performance at various loading rates; evaluate impacts to JBEW ground water; determine soil phosphorus assimilation potential; evaluate performance in relation to soil types; calculate a phosphorus nutrient budget for JBEW; and characterize biota of JBEW. Phosphorus and nitrogen mass can be effectively removed through this system by incorporation into wetland soils, but ground water effects may not be tolerable at higher hydraulic loading rates.
