Question
Download Solution PDFWhich of the following is a typical sequence of waste water treatment?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThis sequence is a typical approach in wastewater treatment and follows these steps:
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Screening: The first step is screening, where large debris and solid waste materials are removed from the wastewater. This prevents damage to equipment in the subsequent treatment processes.
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Sedimentation: After screening, the wastewater undergoes sedimentation. In this process, suspended solids settle to the bottom of the sedimentation tank, forming sludge. The clearer water at the top is separated for further treatment.
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Aerobic Oxidation: The next step is aerobic oxidation, also known as biological treatment. Here, microorganisms break down organic matter in the presence of oxygen. This helps reduce the biochemical oxygen demand (BOD) and remove organic pollutants.
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Disinfection: Following aerobic oxidation, the wastewater is disinfected to kill pathogens and harmful microorganisms. Common methods include chlorination, UV radiation, or ozone treatment.
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Discharge: After disinfection, the treated water is safe to be discharged into natural water bodies or reused for various purposes.
Last updated on Jun 4, 2025
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