FACILITATING FULL FLOW

摘要

During a March 2011 thunderstorm, operators at the Hill Canyon Wastewater Treatment Plant (Thousand Oaks, Calif.) noticed the facility's hydraulic capacity was not what it should be- Restoring the full 189-m~3/d (50-mgd) flow required figuring out what blocked the pipe and crafting a solution to overcome it. After a half-day of thunderstorms, Hill Canyon's flow - normally 38,000 m~3/d (10 mgd) - approached 113,000 m~3/d (30 mgd). During this period operators discovered that the facility's hydraulic capacity was only about 68,000 m~3/d (18 mgd) - the excess flow was sent to emergency retention basins.