What is the primary goal of secondary treatment in wastewater management?

What is the primary goal of secondary treatment in wastewater management?

Step 1: Understand that wastewater contains organic matter, which is material from living things that can pollute water.
Step 2: Learn that biochemical oxygen demand (BOD) is a measure of how much oxygen is needed by microorganisms to break down this organic matter.
Step 3: Know that secondary treatment is a process used to clean wastewater after primary treatment.
Step 4: Realize that the main goal of secondary treatment is to lower the BOD by using microorganisms to eat and break down the organic matter.
Step 5: Conclude that by reducing BOD, secondary treatment helps make the water cleaner and safer for the environment.

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