Final answer:
Aerobic secondary treatment is optimally suited for residential wastewater. The process uses aerobic bacteria to break down organic materials and nutrients in the sewage, providing a vital step in the wastewater treatment process that is predominantly organic in residential sewage. The correct option is C) residential.
Step-by-step explanation:
Aerobic secondary treatment is usually best for residential wastewater. This type of treatment utilizes aerobic bacteria to consume the organic components of the sewage, such as sugars and fats.
The process involves exposing the wastewater to air, either by spraying or bubbling, to supply oxygen to microorganisms that help break down contaminants.
The secondary clarifier then allows these microorganisms to decompose organic material further and absorb nutrients, resulting in a settled mass known as activated sludge, which is later processed or recycled back into the treatment system.
Wastewater treatment is a critical step in resolving water pollution issues and can include advanced steps to remove additional pollutants.
The aerobic bacteria play a pivotal role in this process, especially in the treatment of residential sewage, which is largely organic in nature. Secondary treatment systems such as activated sludge and fixed film systems are vital components of modern sewage treatment plants, ensuring the conversion of waste into less harmful substances.
The correct option is C) residential.