The Sacramento Regional Wastewater Treatment Plant employs reliable treatment processes that mirror nature’s handling of wastewater, with an important advantage: what nature might take months to complete, the Plant accomplishes in about eight hours.
The following important steps take place during the wastewater treatment process:
- Incoming wastewater, or influent, is screened and flows through a primary sedimentation process. This allows most of the solid material to settle to the bottom of tanks and be removed.
- Next, oxygen is added to the wastewater to grow naturally occurring microscopic organisms. These organisms eat particles in the wastewater, thereby removing them from the solution.
- The wastewater then travels to secondary clarifiers where the organisms settle to the bottom and are removed, leaving cleaned water.
- Next, the water is chlorinated to remove any remaining harmful organisms. During this time, the wastewater travels through a two-mile “outfall” to the Sacramento River, near the town of Freeport, California.
- Before entering the river, sulfur dioxide is added to neutralize the chlorine making the water safe for the environment.