Upgrading Primary Tanks with Rotating Biological Contactors

摘要

A one-year experimental program was conducted at Edgewater, New Jersey, to evaluate the concept of upgrading existing primary wastewater treatment plants to the primary sedimentation tanks. The basic concept was to horizontally divide a primary sedimentation tank into two zones by installing an intermediate floor at mid-depth. Four RBS's were placed in the upper zone above the intermediate floor. This zone provided separate biological contact and treatment of the incoming wastes, while the lower zone functioned as a secondary sedimentation zone. Such a configuration would minimize the need for additional tankage and clarifiers, and would be especially suited to plants with limited space. The experimental program was conducted in three phases over a full year.