Activated sludge

In biological wastewater treatment, activated sludge refers to either

• the active population of micro-organisms, including bacteria and other living organisms such as fungi and protozoa, used to treat wastewater.
• the wastewater treatment process in which these organisms are employed, or
• the sludge resulting from that process.

Source: GreenFacts

Micro-organism - Sewage

DBP

DINP-DIDP

DEHP