Peripheral Drive Clarifiers from Schreiber use leverage rather than center-drive torque to rotate the scraper and skimming assembly, resulting in a simplified mechanical system. All equipment for continuous removal of floatables and settled solids is suspended from a rotating bridge or, for smaller units, a lightweight rotating beam arm. The skimming equipment removes floatables regardless of wind direction, and helical scrapers transport settled solids to the center of the basin in a single revolution. Equipment can be lifted above the water level for inspection or maintenance without dewatering the basin. 205/655-7466; www.schreiberwater.com.