Natural Treatment and On‐Site Processes

Abstract

Natural treatment systems for wastewater can be divided into three broad categories: soil-based systems, which include sub surface infiltration, rapid infiltration/soil aquifer treatment, over land flow, and slow rate systems; wetland systems, which in clude free water surface and submerged flow systems; and aquatic systems, which include pond and floating aquatic plant systems. Many, but not all, on-site wastewater treatment sys tems are natural systems using septic tanks as a pretreatment