First, water is routed from an impervious surface to the first treatment cell, the sedimentation chamber. This chamber is either a large tank or just a leak proof depression in the ground where water ...

Over time, grime and buildup in the tank can corrode the flushing mechanisms and lead to excessive staining of the toilet ...

"These are rotating tanks," she said. "Essentially re-creating a situation where sediment is disturbed and doesn't settle - it's circulating through the water." The experiment, which was part of ...