All Things Water Course I, Activated Sludge

Wastewater Treatment Plant Overview00:01:29

An introduction to the typical wastewater treatment flowsheet, starting from screening and grit removal to primary clarification, secondary biological treatment using activated sludge, and final disinfection.

Key Treatment Parameters: BOD and TSS00:06:01

Explanation of Biochemical Oxygen Demand (BOD) as a surrogate for organic matter and Total Suspended Solids (TSS) as a measure of particulate matter, along with standard influent and effluent quality requirements.

The Activated Sludge Process00:13:30

Detailed breakdown of the activated sludge cycle, which utilizes an aeration basin and clarifier with a recycle stream to concentrate microorganisms, accelerating the degradation of organic waste.

Operational Parameters00:16:28

Analysis of critical metrics for system health, including Mixed Liquor Suspended Solids (MLSS), dissolved oxygen levels, hydraulic retention time, solids retention time, and the food-to-mass ratio.

System Configurations00:26:05

Comparison of different aeration systems, specifically diffused aeration (coarse vs. fine bubble) and mechanical surface aeration, including the use of oxidation ditches for efficient treatment.