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The effluent from the ………..treatment pla...

The effluent from the ………..treatment plant is generally released into natural water bodies like rivers and streams.

A

primary

B

secondary

C

primordial

D

tertiary

Text Solution

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The correct Answer is:
To solve the question regarding which treatment plant's effluent is generally released into natural water bodies like rivers and streams, we can break down the process of wastewater treatment into steps: ### Step-by-Step Solution: 1. **Understanding Wastewater Treatment**: Wastewater treatment typically involves multiple stages, including primary treatment, secondary treatment, and sometimes tertiary treatment. Each stage has a specific function in treating the wastewater. 2. **Primary Treatment**: In the primary treatment stage, large solids are removed from the wastewater through physical processes such as screening and sedimentation. The effluent from this stage is not typically released into natural water bodies because it still contains a significant amount of organic matter and pollutants. 3. **Secondary Treatment**: The secondary treatment stage involves biological processes where microorganisms break down organic matter in the wastewater. This stage significantly reduces the biochemical oxygen demand (BOD) and removes pathogens. The effluent from this stage is much cleaner than that from the primary treatment. 4. **Discharge of Effluent**: After secondary treatment, the effluent is often subjected to further processes like settling, where remaining solids are removed. The treated effluent is then suitable for discharge into natural water bodies such as rivers and streams, as it meets environmental standards for water quality. 5. **Conclusion**: Based on the understanding of the treatment stages, the effluent that is generally released into natural water bodies comes from the **secondary treatment plant**. ### Final Answer: The effluent from the **secondary treatment plant** is generally released into natural water bodies like rivers and streams. ---
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