Study of Fixed-Film Biological Contactors for Recreational Area Wastewater Treatment Application,
RHODE ISLAND UNIV KINGSTON DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Pagination or Media Count:
A survey was conducted in 1981 to evaluate the type and performance of existing wastewater treatment facilities in U.S. Army Corps of Engineers Civil Works CE recreational areas 1. It was found that septic tank-leaching field or septic tank-sand filter systems for subsurface discharge are by far the most used treatment systems, followed by extended aeration and lagoon systems. Occasional high suspended solid SS concentration in lagoon effluents is not uncommon since dispersed growth and algal cells do not settle well. Upsets of extended aeration treatment plants are experienced by many recreational areas from time to time resulting in biochemical oxygen demand BOD and SS concentrations higher than the acceptable limits. This phenomenon is typical of an extended aeration process which has dispersed growth leading to poor settling in the final clarifier.