Wastewater

Wastewater

Introduction
Screening/Grit
Primary Settling

Solids
Digester
Drying Beds
Belt Filter Press
LSPS

Liquids
Aeration Basin
Final Settling
RAS
Filters
Reuse Tank
Chlorine Contact
Zone of Mixing
Outfall Area

Personnel

Flowchart

Plant Map

Assignment

The secondary clarifier is a gigantic circular pool with a large pipe in the center. The pipe is bringing in the suspension (MLSS) from the aeration tanks. (To see what the secondary clarifier looks like when it's empty, click here )

Solids from the MLSS settle in the final clarifier while the supernatant (clear water) is treated with chlorine and sulfur dioxide for ocean discharge.

Here Mr. Robert Smith, Operations Superintendent, lowers a device into the water of the secondary clarifier which takes a “core sample” of the sludge on the bottom. This allows him to measure the depth to which the sludge has accumulated and to be sure it does not become too thick (more than 4 feet is undesirable).