When wastewater first enters the plant, it is screened to remove any large debris or objects that are in the flow. If not removed, these could damage pumps or equipment in the facility. The wastewater is then pumped to the primary treatment facilities. Computer control stabilizes the flow rate for downstream processes.
Wastewater is screened again during primary treatment to remove finer solid materials. First flows through two grit tanks that allow heavier particles to settle to the bottom of the tank. Then it flows through finer screens to remove smaller suspended solids.
From here, wastewater flows into one of six sedimentation tanks. Any remaining material suspended in the water settles and is pumped to the solids treatment facilities.