activated sewage的意思|示意

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Activated sewage, also known as activated sludge, is a process used to treat wastewater and sewage. The term activated refers to the activity of microorganisms, most commonly bacteria, used to break down organic matter. The process is commonly used in municipal wastewater treatment plants to reduce pollutants such as nitrogen and phosphorus in the water prior to its discharge back into the environment.

The process works by introducing oxygen into raw sewage and allowing for microbial growth. This microbial growth is known as the activated sludge. As the sludge increases, it is able to break down organic material present in the wastewater through oxidation. Nitrogen and phosphorus are also broken down into simpler compounds, allowing for the water to be safely discharged. The activated sludge is then removed and treated separately, allowing the treated water to be safely returned to the environment.

Activated sewage can also be used to remove heavy metals and other contaminants from industrial waste water, providing an effective and cost-efficient way to reduce the amount of pollutants entering the environment. This can help to protect land, surface water, and groundwater resources.

The process of activated sewage has been widely used since the 1950s and is still used to this day. It is an effective and reliable way to treat wastewater and remove pollutants from the environment, making it an important part of wastewater treatment.