Activated sludge method

The activated sludge method is a widely used wastewater treatment process that helps in controlling environmental pollution. It involves aerating wastewater in a large tank, which allows bacteria and other microorganisms to break down organic pollutants. The process starts with the introduction of raw _____ ______ _________ _____ ________ _______ ___ ______ ______ __________ _________.
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