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Secondary treatment focuses on biological processes to degrade organic matter. This is accomplished through aeration tanks, where microorganisms are introduced to consume organic pollutants. The most commonly used methods in secondary treatment include activated sludge systems and biofilm reactors. These processes can significantly reduce the biochemical oxygen demand (BOD) and total suspended solids in the water.
waste water treatment

2. Primary Treatment During primary treatment, the wastewater is allowed to settle in a large tank. This process segregates solids from liquids through sedimentation. Primary clarifiers and settling tanks are vital components of this phase, as they enable the separation of suspended solids from liquid waste. The solid part, known as sludge, is then further treated, while the clarified liquid moves on to secondary treatment.
waste water treatment equipment
